0000936395-20-000042 | 10-K | XBRL Viewer

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Cover Page - USD ($) $ in Billions	12 Months Ended
Cover Page - USD ($) $ in Billions	Oct. 31, 2020	Dec. 11, 2020	May 01, 2020
Cover [Abstract]
Document Type	10-K
Document Annual Report	true
Document Period End Date	Oct. 31, 2020
Current Fiscal Year End Date	--10-31
Document Transition Report	false
Entity File Number	001-36250
Entity Registrant Name	Ciena Corp
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	23-2725311
Entity Address, Address Line One	7035 Ridge Road
Entity Address, City or Town	Hanover
Entity Address, State or Province	MD
Entity Address, Postal Zip Code	21076
City Area Code	410
Local Phone Number	694-5700
Title of 12(b) Security	Common Stock, $0.01 par value
Trading Symbol	CIEN
Security Exchange Name	NYSE
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Emerging Growth Company	false
ICFR Auditor Attestation Flag	true
Entity Shell Company	false
Entity Public Float			$ 7.1
Entity Common Stock, Shares Outstanding		154,564,349
Documents Incorporated by Reference	Part III of the Form 10-K incorporates by reference certain portions of the registrant’s definitive proxy statement for its 2021 Annual Meeting of Stockholders to be filed with the Commission not later than 120 days after the end of the fiscal year covered by this report.
Entity Central Index Key	0000936395
Document Fiscal Year Focus	2020
Document Fiscal Period Focus	FY
Amendment Flag	false

Consolidated Balance Sheets - USD ($) $ in Thousands	Oct. 31, 2020	Nov. 02, 2019
Current assets:
Cash and cash equivalents	$ 1,088,624	$ 904,045
Short-term investments	150,667	109,940
Accounts receivable, net	719,405	724,854
Inventories, net	344,379	345,049
Prepaid expenses and other	308,084	297,914
Total current assets	2,611,159	2,381,802
Long-term investments	82,226	10,014
Equipment, building, furniture and fixtures, net		286,884
Equipment, building, furniture and fixtures, net	272,377
Operating right-of-use assets	57,026
Goodwill	310,847	297,937
Other intangible assets, net	96,647	112,781
Deferred tax asset, net	647,805	714,942
Other long-term assets	102,830	88,986
Total assets	4,180,917	3,893,346
Current liabilities:
Accounts payable	291,904	344,819
Accrued liabilities and other short-term obligations	334,132	382,740
Deferred revenue	108,700	111,381
Operating lease liabilities	19,035
Current portion of long-term debt	6,930	7,000
Total current liabilities	760,701	845,940
Long-term deferred revenue	49,663	45,492
Other long-term obligations	123,185	148,747
Long-term operating lease liabilities	61,415
Long-term debt, net	676,356	680,406
Total liabilities	1,671,320	1,720,585
Commitments and contingencies (Note 26)
Stockholders’ equity:
Preferred stock — par value $0.01; 20,000,000 shares authorized; zero shares issued and outstanding	0	0
Common stock — par value $0.01; 290,000,000 shares authorized; 154,563,005 and 154,403,850 shares issued and outstanding	1,546	1,544
Additional paid-in capital	6,826,531	6,837,714
Accumulated other comprehensive loss	(35,358)	(22,084)
Accumulated deficit	(4,283,122)	(4,644,413)
Total stockholders’ equity	2,509,597	2,172,761
Total liabilities and stockholders’ equity	$ 4,180,917	$ 3,893,346

Consolidated Balance Sheets (Parenthetical) - $ / shares	Oct. 31, 2020	Nov. 02, 2019
Statement of Financial Position [Abstract]
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized (in shares)	20,000,000	20,000,000
Preferred stock, shares issued (in shares)	0	0
Preferred stock, shares outstanding (in shares)	0	0
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	290,000,000	290,000,000
Common stock, shares issued (in shares)	154,563,005	154,403,850
Common stock, shares outstanding (in shares)	154,563,005	154,403,850

Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Oct. 31, 2020	Nov. 02, 2019	Nov. 03, 2018
Revenue:
Total revenue	$ 3,532,157	$ 3,572,131	$ 3,094,286
Cost of goods sold:
Total cost of goods sold	1,879,266	2,030,065	1,779,596
Gross profit	1,652,891	1,542,066	1,314,690
Operating expenses:
Research and development	529,888	548,139	491,564
Selling and marketing	416,425	423,046	394,060
General and administrative	169,548	174,399	160,133
Amortization of intangible assets	23,383	21,808	15,737
Acquisition and integration costs	4,031	3,370	5,111
Significant asset impairments and restructuring costs	22,652	24,538	18,139
Total operating expenses	1,165,927	1,195,300	1,084,744
Income from operations	486,964	346,766	229,946
Interest and other income (loss), net	964	3,876	(12,029)
Interest expense	(31,321)	(37,452)	(55,249)
Loss on extinguishment and modification of debt	(646)	0	(13,887)
Income before income taxes	455,961	313,190	148,781
Provision for income taxes	94,670	59,756	493,471
Net income (loss)	$ 361,291	$ 253,434	$ (344,690)
Basic net income (loss) per common share (in dollars per share)	$ 2.34	$ 1.63	$ (2.40)
Diluted net income (loss) per potential common share (in dollars per share)	$ 2.32	$ 1.61	$ (2.49)
Weighted average basic common shares outstanding (in shares)	154,287	155,720	143,738
Weighted average diluted potential common shares outstanding (in shares)	155,955	157,612	143,738
Products
Revenue:
Total revenue	$ 2,914,790	$ 2,983,815	$ 2,565,460
Cost of goods sold:
Total cost of goods sold	1,573,791	1,716,358	1,507,157
Services
Revenue:
Total revenue	617,367	588,316	528,826
Cost of goods sold:
Total cost of goods sold	$ 305,475	$ 313,707	$ 272,439

Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands	12 Months Ended
	Oct. 31, 2020	Nov. 02, 2019	Nov. 03, 2018
Net income (loss)	$ 361,291	$ 253,434	$ (344,690)
Other Comprehensive Income (Loss)
Change in unrealized gain (loss) on available-for-sale securities, net of tax	(107)	577	26
Change in accumulated translation adjustments	(4,174)	(763)	686
Other comprehensive income (loss)	(13,274)	(16,304)	5,237
Total comprehensive income (loss)	348,017	237,130	(339,453)
Foreign currency forward contracts
Other Comprehensive Income (Loss)
Change in unrealized gain (loss) on derivatives	(1,144)	3,985	(1,674)
Forward starting interest rate swaps
Other Comprehensive Income (Loss)
Change in unrealized gain (loss) on derivatives	$ (7,849)	$ (20,103)	$ 6,199

- Definition

The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

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+ Details

Consolidated Statements of Changes in Stockholders' Equity - USD ($) $ in Thousands	Total	Effect of adoption of new accounting standard	Common Stock	Additional Paid-in-Capital	Additional Paid-in-Capital Effect of adoption of new accounting standard	Accumulated Other Comprehensive Income (Loss)	Accumulated Deficit	Accumulated Deficit Effect of adoption of new accounting standard
Beginning balance at Oct. 31, 2017	$ 2,136,342	$ 62,123	$ 1,430	$ 6,810,182	$ 832	$ (11,017)	$ (4,664,253)	$ 61,291
Beginning balance (in shares) at Oct. 31, 2017			143,043,227
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	(344,690)						(344,690)
Other comprehensive income (loss)	5,237					5,237
Reclassification of cash conversion feature	(152,142)			(152,142)
Conversion of convertible notes into common shares	262,103		$ 122	261,981
Conversion of convertible notes into common shares (in shares)			12,236,146
Repurchases of common stock - repurchase program	(110,981)		$ (44)	(110,937)
Repurchases of common stock - repurchase program (in shares)			(4,290,801)
Issuance of shares from employee equity plans	23,127		$ 37	23,090
Issuance of shares from employee equity plans (in shares)			3,484,018
Share-based compensation expense	52,972			52,972
Shares repurchased for tax withholdings on vesting of restricted stock units	(4,757)		$ (2)	(4,755)
Shares repurchased for tax withholdings on vesting of restricted stock units (in shares)			(154,059)
Ending balance at Nov. 03, 2018	1,929,334	$ 49,805	$ 1,543	6,881,223	$ 0	(5,780)	(4,947,652)	$ 49,805
Ending balance (in shares) at Nov. 03, 2018			154,318,531
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	253,434						253,434
Other comprehensive income (loss)	(16,304)					(16,304)
Conversion of convertible notes into common shares	52,944		$ 16	52,928
Conversion of convertible notes into common shares (in shares)			1,585,140
Repurchases of common stock - repurchase program	(150,076)		$ (38)	(150,038)
Repurchases of common stock - repurchase program (in shares)			(3,838,466)
Issuance of shares from employee equity plans	22,947		$ 31	22,916
Issuance of shares from employee equity plans (in shares)			3,112,916
Share-based compensation expense	59,736			59,736
Shares repurchased for tax withholdings on vesting of restricted stock units	(29,059)		$ (8)	(29,051)
Shares repurchased for tax withholdings on vesting of restricted stock units (in shares)			(774,271)
Ending balance at Nov. 02, 2019	$ 2,172,761		$ 1,544	6,837,714		(22,084)	(4,644,413)
Ending balance (in shares) at Nov. 02, 2019	154,403,850		154,403,850
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	$ 361,291						361,291
Other comprehensive income (loss)	(13,274)					(13,274)
Repurchases of common stock - repurchase program	(74,535)		$ (19)	(74,516)
Repurchases of common stock - repurchase program (in shares)			(1,872,446)
Issuance of shares from employee equity plans	28,068		$ 29	28,039
Issuance of shares from employee equity plans (in shares)			2,787,011
Share-based compensation expense	67,758			67,758
Shares repurchased for tax withholdings on vesting of restricted stock units	(32,472)		$ (8)	(32,464)
Shares repurchased for tax withholdings on vesting of restricted stock units (in shares)			(755,410)
Ending balance at Oct. 31, 2020	$ 2,509,597		$ 1,546	$ 6,826,531		$ (35,358)	$ (4,283,122)
Ending balance (in shares) at Oct. 31, 2020	154,563,005		154,563,005

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Oct. 31, 2020	Nov. 02, 2019	Nov. 03, 2018
Cash flows from operating activities:
Net income (loss)	$ 361,291	$ 253,434	$ (344,690)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Loss on extinguishment of debt	0	0	10,039
Loss on fair value of debt conversion liability	0	0	12,070
Depreciation of equipment, building, furniture and fixtures, and amortization of leasehold improvements	93,908	87,576	84,214
Share-based compensation costs	67,758	59,736	52,972
Amortization of intangible assets	38,619	35,136	25,806
Deferred taxes	64,339	19,865	463,631
Provision for doubtful accounts	8,855	6,740	2,700
Provision for inventory excess and obsolescence	24,701	28,085	30,615
Provision for warranty	22,417	23,105	20,992
Other	11,628	(910)	21,685
Changes in assets and liabilities:
Accounts receivable	(17,299)	65,712	(168,357)
Inventories	(25,044)	(112,941)	(27,445)
Prepaid expenses and other	(38,998)	(96,618)	(21,425)
Operating lease right-of-use assets	16,787
Accounts payable, accruals and other obligations	(117,931)	27,740	85,798
Deferred revenue	2,519	16,480	(19,344)
Short and long-term operating lease liabilities	(19,896)
Net cash provided by operating activities	493,654	413,140	229,261
Cash flows provided by (used in) investing activities:
Payments for equipment, furniture, fixtures and intellectual property	(82,667)	(62,579)	(67,616)
Purchase of available for sale securities	(223,196)	(158,074)	(286,824)
Proceeds from maturities of available for sale securities	110,390	248,748	410,109
Purchase of equity investment	0	(2,667)	(1,767)
Settlement of foreign currency forward contracts, net	3,531	(1,351)	9,385
Acquisition of businesses, net of cash acquired	(28,300)	0	(82,670)
Net cash provided by (used in) investing activities	(220,242)	24,077	(19,383)
Cash flows from financing activities:
Proceeds from issuance of long-term debt, net	0	0	305,125
Payment of long-term debt	(5,198)	(7,000)	(292,730)
Payment for debt conversion liability	0	(111,268)	0
Payment for make-whole provision upon conversion of long-term debt	0	0	(13,453)
Payment of debt issuance costs	(382)	(1,191)	(1,936)
Payment of finance lease obligations	(2,703)
Payment of finance lease obligations		(3,319)	(3,624)
Shares repurchased for tax withholdings on vesting of restricted stock units	(32,472)	(29,059)	(4,757)
Repurchases of common stock - repurchase program	(74,535)	(150,076)	(110,981)
Proceeds from issuance of common stock	28,068	22,947	23,127
Net cash used in financing activities	(87,222)	(278,966)	(99,229)
Effect of exchange rate changes on cash, cash equivalents and restricted cash	(1,643)	476	(5,856)
Net increase in cash, cash equivalents and restricted cash	184,547	158,727	104,793
Cash, cash equivalents and restricted cash at beginning of fiscal year	904,161	745,434	640,641
Cash, cash equivalents and restricted cash at end of fiscal year	1,088,708	904,161	745,434
Supplemental disclosure of cash flow information
Cash paid during the fiscal year for interest	32,837	39,579	44,750
Cash paid during the fiscal year for income taxes, net	53,076	33,570	26,900
Operating lease payments	22,089
Non-cash investing and financing activities
Purchase of equipment in accounts payable	7,854	16,549	5,118
Contingent consideration for acquisition of business	0	0	10,900
Operating lease right-of-use assets subject to lease liability	24,160
Unrealized gain on equity investment	2,681	0	0
3.75% Convertible Senior Notes due October 15, 2018
Non-cash investing and financing activities
Conversion of convertible senior notes	0	0	61,270
4.0% Convertible Senior Notes due March 15, 2015
Non-cash investing and financing activities
Conversion of convertible senior notes	0	0	214,286
3.75% Convertible Senior Notes due October 15, 2018 (New)
Non-cash investing and financing activities
Conversion of convertible senior notes	$ 0	$ 52,944	$ 0

Consolidated Statements of Cash Flows (Parenthetical) - shares	12 Months Ended
	Nov. 02, 2019	Nov. 03, 2018
3.75% Convertible Senior Notes due October 15, 2018
Debt conversion, shares issued (in shares)		3,038,208
4.0% Convertible Senior Notes due March 15, 2015
Debt conversion, shares issued (in shares)		9,197,943
3.75% Convertible Senior Notes due October 15, 2018 (New)
Interest rate on convertible notes		0.0375%
Debt conversion, shares issued (in shares)	1,585,140

Ciena Corporation and Significant Accounting Policies and Estimates

12 Months Ended

Oct. 31, 2020

Accounting Policies [Abstract]

CIENA CORPORATION AND SIGNIFICANT ACCOUNTING POLICIES AND ESTIMATES

Description of Business

Ciena Corporation (“Ciena” or the “Company”) is a networking systems, services and software company, providing solutions that enable a wide range of network operators to deploy and manage next-generation networks that deliver services to businesses and consumers. Ciena provides hardware, software and services that e the transport, routing, switching, aggregation, service delivery and management of video, data and voice traffic on communications networks. Ciena’s solutions are used by communications service providers, cable and multiservice operators, Web-scale providers, submarine network operators, governments, enterprises, research and education institutions and emerging network operators.

Ciena’s solutions include Networking Platforms, including Ciena’s Converged Packet Optical and Packet Networking portfolios, which can be applied from the network core to end-user access points, and which allow network operators to scale capacity, increase transmission speeds, allocate traffic and adapt dynamically to changing end-user service demands. Ciena’s Converged Packet Optical portfolio includes products and solutions that support the connection of content to content and users to content, including in long haul and regional, submarine and data center interconnect networks. Ciena’s Packet Networking portfolio includes products and solutions that enable next-generation metro, access and aggregation networks, connecting users to content in applications that include 5G, mobile backhaul, virtualization and enterprise services.

To complement these solutions, Ciena offers Platform Software, which provides management, domain control and specialized applications that automate network lifecycle operations, including provisioning equipment and services, network data, analytics and policy-based assurance to achieve closed loop automation across multi-vendor and multi-domain network environments. Through Ciena’s Blue Planet® Software suite, Ciena enables customers to transform their business and operations support systems (“OSS”) through software-based automation of their network and IT infrastructures. To complement these hardware and software products, Ciena offers a broad range of services that help its customers build, operate and improve their networks and associated operational environments, including network optimization and migration offerings.

Ciena refers to its complete portfolio vision as the Adaptive Network. The Adaptive Network emphasizes a programmable network infrastructure, software control and automation capabilities, network analytics and intelligence, and related advanced services. By transforming network infrastructures into a dynamic, programmable environment driven by automation and analytics, network operators can realize greater business agility, dynamically adapt to changing end user service demands and rapidly introduce new revenue-generating services. They can also gain valuable real-time network insights, allowing them to optimize network operation and maximize the return on their network infrastructure investment.

Basis of Presentation

The accompanying consolidated financial statements include the accounts of Ciena and its wholly owned subsidiaries. All intercompany accounts and transactions have been eliminated in consolidation.

Ciena has a 52 or 53-week fiscal year, which ends on the Saturday nearest to the last day of October in each year. Fiscal 2020 and fiscal 2019 each consisted of a 52-week fiscal year and fiscal 2018 consisted of a 53-week fiscal year. Effective the second quarter of fiscal 2020, Ciena changed the presentation of reporting for its financial statements and notes thereto to reflect the actual dates on which fiscal years ended. Because these dates can change from period to period, for consistency purposes, Ciena previously presented such information indicating that its fiscal years ended on October 31. This change, affecting only the presentation of such information, was made on a prospective basis and it does not impact comparability of previous financial results. Reference to prior reported periods have been changed to reflect the actual period end dates of November 2, 2019, November 3, 2018 and October 28, 2017 for periods reported herein.

Business Combinations

participant. Ciena’s estimates are based on historical experience, information obtained from the management of the acquired companies and, when appropriate, include assistance from independent third-party appraisal firms. Significant assumptions and estimates can include, but are not limited to, the cash flows that an asset is expected to generate in the future, the appropriate weighted-average cost of capital and the cost savings expected to be derived from acquiring an asset. These estimates are inherently uncertain and unpredictable. In addition, unanticipated events and circumstances may occur which may affect the accuracy or validity of such estimates.

Use of Estimates

The preparation of the financial statements and related disclosures in conformity with Generally Accepted Accounting Principles (“GAAP”) requires management to make estimates and judgments that affect the amounts reported in the consolidated financial statements and accompanying notes. Estimates are used for selling prices for multiple element arrangements, shared-based compensation, bad debts, valuation of inventories and investments, recoverability of intangible assets, other long-lived assets and goodwill, income taxes, warranty obligations, restructuring liabilities, derivatives, contingencies and litigation. Ciena bases its estimates on historical experience and assumptions that it believes are reasonable. Actual results may differ materially from management’s estimates.

Cash and Cash Equivalents

Ciena considers all highly liquid investments purchased with original maturities of three months or less to be cash equivalents. Any restricted cash collateralizing letters of credit is included in other current assets and other long-term assets depending on the duration of the restriction.

Investments

Ciena has minority equity investments in privately held technology companies that are classified in other long-term assets. These investments are carried at cost because Ciena owns less than 20% of the voting equity and does not have the ability to exercise significant influence over the company. Ciena monitors these investments for impairment and makes appropriate reductions to the carrying value when necessary. As of October 31, 2020, the combined carrying value of these investments was $13.4 million. Ciena elects to estimate the fair value at cost minus impairment, if any, plus or minus observable price changes in orderly transactions for identical or similar investments of the same issuer. Ciena evaluates these investments for impairment or observable price changes quarterly and records adjustments to interest and other income (loss), net on the Consolidated Statements of Operations.

Inventories

Segment Reporting

Ciena’s chief operating decision maker, its chief executive officer, evaluates the Company’s performance and allocates resources based on multiple factors, including measures of segment profit (loss). Operating segments are defined as components of an enterprise that engage in business activities that may earn revenue and incur expense, for which discrete financial information is available, and for which such information is evaluated regularly by the chief operating decision maker for purposes of allocating resources and assessing performance. Ciena has the following operating segments for reporting purposes: (i) Networking Platforms; (ii) Platform Software and Services; (iii) Blue Planet Automation Software and Services; and (iv) Global Services. See Note 24 below.

Goodwill

Goodwill is the excess of the purchase price over the fair values assigned to the net assets acquired in a business combination. Ciena tests goodwill for impairment on an annual basis, which it has determined to be the last business day of fiscal September each year. Ciena also tests goodwill for impairment between annual tests if an event occurs or circumstances change that would, more likely than not, reduce the fair value of the reporting unit below its carrying value.

Ciena tests goodwill impairment by comparing the fair value of the reporting unit with the unit’s carrying amount, including goodwill. If this test indicates that the fair value is less than the carrying value, then an impairment loss is recognized limited to the total amount of goodwill allocated to that reporting unit. A non-cash goodwill impairment charge would have the effect of decreasing earnings or increasing losses in such period. If Ciena is required to take a substantial impairment charge, its operating results would be materially adversely affected in such period.

Long-lived Assets

Long-lived assets include: equipment, building, furniture and fixtures, ROU assets, finite-lived intangible assets and maintenance spares. Ciena tests long-lived assets for impairment whenever triggering events or changes in circumstances indicate that the asset’s carrying amount is not recoverable from its undiscounted cash flows. An impairment loss is measured as the amount by which the carrying amount of the asset or asset group exceeds its fair value. Ciena’s long-lived assets are assigned to asset groups that represent the lowest level for which cash flows can be identified.

Equipment, Building, Furniture and Fixtures and Internal Use Software

Equipment, building, furniture and fixtures are recorded at cost. Depreciation and amortization are computed using the straight-line method over useful lives of two years to five years for equipment and furniture and fixtures and the shorter of useful life or lease term for leasehold improvements.

Qualifying internal use software and website development costs incurred during the application development stage, which consist primarily of outside services and purchased software license costs, are capitalized and amortized straight-line over the estimated useful lives of two years to five years.

Leases

At the inception of a contract, Ciena must determine whether the contract is or contains a lease. The contract is or contains a lease if the contract conveys the right to control the use of the property, plant, or equipment for a designated term in exchange for consideration. Ciena’s evaluation of its contracts follows the assessment of whether there is a right to obtain substantially all of the economic benefits from the use and the right to direct the use of the identified asset in the contract. Operating leases are included in the Operating right-of-use assets (“Operating ROU assets”), Operating lease liabilities and Long-term operating lease liabilities in the Consolidated Balance Sheets. Finance leases are included in Equipment, building, furniture and fixtures, net (“Finance ROU assets”), Accrued liabilities and other short-term obligations and Other long-term obligations in the Consolidated Balance Sheets.

Ciena has operating and finance leases that primarily relate to real property. Ciena has elected not to capitalize leases with a term of 12 months or less without a purchase option that it is likely to exercise. Ciena has elected not to separate lease and non-lease components of operating and finance leases. Lease components are payment items directly attributable to the use of the underlying asset, while non-lease components are explicit elements of a contract not directly related to the use of the underlying asset, including pass-through operating expenses like common area maintenance and utilities.

Operating ROU assets and lease liabilities and Finance ROU assets and lease liabilities are recognized on the Consolidated Balance Sheets at the present value of the future lease payments over the life of the lease term. Ciena uses discount rates based on incremental borrowing rates, on a collateralized basis, for the respective underlying assets, for terms similar to the respective leases when implicit rates for leases are not determinable. Operating lease costs are included as rent expense in the Consolidated Statements of Operations. Fixed base payments on operating leases paid directly to the lessor are recorded as lease expense on a straight-line basis. Related variable payments based on usage, changes in an index, or market rate are expensed as incurred. Finance ROU assets are generally amortized on a straight-line basis over the lease term with the interest expense on the lease liability recorded using the interest method. The amortization and interest expense are recorded separately in the Consolidated Statements of Operations.

Intangible Assets

Ciena has recorded finite-lived intangible assets as a result of several acquisitions. Finite-lived intangible assets are carried at cost less accumulated amortization. Amortization is computed using the straight-line method over the expected economic lives of the respective assets, up to seven years, which approximates the use of intangible assets.

Maintenance Spares

Maintenance spares are recorded at cost. Spares usage cost is expensed ratably over four years.

Concentrations

Substantially all of Ciena’s cash and cash equivalents are maintained at a small number of major U.S. financial institutions. The majority of Ciena’s cash equivalents consist of money market funds. Deposits held with banks may exceed the amount of insurance provided on such deposits. Because these deposits generally may be redeemed upon demand, management believes that they bear minimal risk.

Historically, a significant percentage of Ciena’s revenue has been concentrated among sales to a small number of large communications service providers and Web-scale providers. Consolidation among Ciena’s customers has increased this concentration. Consequently, Ciena’s accounts receivable are concentrated among these customers. See Note 24 below.

Additionally, Ciena’s access to certain materials or components is dependent on sole or limited source suppliers. The inability of any of these suppliers to fulfill Ciena’s supply requirements, or significant changes in supply cost, could affect future results. Ciena relies on a small number of contract manufacturers to perform the majority of the manufacturing for its products. If Ciena cannot effectively manage these manufacturers or forecast future demand, or if these manufacturers fail to deliver products or components on time, Ciena’s business and results of operations may suffer.

Revenue Recognition

Ciena recognizes revenue when control of the promised products or services is transferred to its customer, in an amount that reflects the consideration to which Ciena expects to be entitled in exchange for those products or services.

Ciena determines revenue recognition by applying the following five-step approach:

•identification of the contract, or contracts, with a customer;

•identification of the performance obligations in the contract;

•determination of the transaction price;

•allocation of the transaction price to the performance obligations in the contract; and

•recognition of revenue when, or as, Ciena satisfies a performance obligation.

Generally, Ciena makes sales pursuant to purchase orders placed by customers under framework agreements that govern the general commercial terms and conditions of the sale of Ciena’s products and services. These purchase orders under framework agreements are used to determine the identification of the contract or contracts with this customer. Purchase orders typically include the description, quantity, and price of each product or service purchased. Purchase orders may include one-line bundled pricing for both products and services. Accordingly, purchase orders can include various combinations of products and services that are generally distinct and accounted for as separate performance obligations. Ciena evaluates each promised product and service offering to determine whether it represents a distinct performance obligation. In doing so, Ciena considers, among other things, customary business practices, whether the customer can benefit from the product or service on its own or together with other resources that are readily available, and whether Ciena’s commitment to transfer the product or service to the customer is separately identifiable from other obligations in the purchase order. For transactions where Ciena delivers the product or services, Ciena is typically the principal and records revenue and costs of goods sold on a gross basis.

Purchase orders are invoiced based on the terms set forth either in the purchase order or the framework agreement, as applicable. Generally, sales of products and software licenses are invoiced upon shipment or delivery. Maintenance and software subscription services are invoiced quarterly or annually in advance of the service term. Ciena’s other service offerings are generally invoiced upon completion of the service. Payment terms and cash received typically range from 30 to 90 days from the invoicing date. Historically, Ciena has not provided any material financing arrangements to its customers. As a practical expedient, Ciena does not adjust the amount of consideration it will receive for the effects of a significant financing

component as it expects, at contract inception, that the period between Ciena transfer of the products or services to the customer, and customer payment for the products or services will be one year or less. Shipping and handling fees invoiced to customers are included in revenue, with the associated expense included in product cost of goods sold. Ciena records revenue net of any associated sales taxes.

Ciena recognizes revenue upon the transfer of control of promised products or services to a customer. Transfer of control occurs once the customer has the contractual right to use the product, generally upon shipment or delivery to the customer. Transfer of control can also occur over time for services such as software subscription, maintenance, installation, and various professional services as the customer receives the benefit over the contract term.

Significant Judgments

Revenue is allocated among performance obligations based on standalone selling price (“SSP”). SSP reflects the price at which Ciena would expect to sell that product or service on a stand-alone basis at contract inception and that Ciena would expect to be entitled to receive for the promised products or services. SSP is estimated for each distinct performance obligation, and judgment may be required in its determination. The best evidence of SSP is the observable price of a product or service when Ciena sells the products separately in similar circumstances and to similar customers. In instances where SSP is not directly observable, Ciena determines SSP using information that may include market conditions and other observable inputs.

Ciena applies judgment in determining the transaction price, as Ciena may be required to estimate variable consideration when determining the amount of revenue to recognize. Variable consideration can include various rebate, cooperative marketing, and other incentive programs that Ciena offers to its distributors, partners and customers. When determining the amount of revenue to recognize, Ciena estimates the expected usage of these programs, applying the expected value or most likely estimate and updates the estimate at each reporting period as actual utilization data becomes available. Ciena also considers any customer right of return and any actual or potential payment of liquidated damages, contractual or similar penalties, or other claims for performance failures or delays in determining the transaction price, where applicable.

When transfer of control is judged to be over time for installation and professional service arrangements, Ciena applies the input method to determine the amount of revenue to be recognized in a given period. Utilizing the input method, Ciena recognizes revenue based on the ratio of actual costs incurred to date to the total estimated costs expected to be incurred. Revenue for software subscription and maintenance is recognized ratably over the period during which the services are performed.

Capitalized Contract Acquisition Costs

Ciena has considered the impact of the guidance in ASC 340-40, Other Assets and Deferred Costs; Contracts with Customers, and the interpretations of the Financial Accounting Standards Board (“FASB”) Transition Resource Group for Revenue Recognition with respect to capitalization and amortization of incremental costs of obtaining a contract. In conjunction with this interpretation, Ciena considers each customer purchase in combination with the corresponding framework agreement, if applicable, as a contract. Ciena has elected to implement the practical expedient, which allows for incremental costs to be recognized as an expense when incurred if the period of the asset recognition is one year or less. If the period of the asset recognition is greater than one year, Ciena amortizes these costs over the period of performance. Ciena considers sales commissions incurred upon receipt of purchase orders placed by customers as incremental costs to obtain such purchase orders. The practical expedient method is applied to the purchase order as a whole and thus the capitalized costs of obtaining a purchase order is applied even if the purchase order contains more than one performance obligation. In cases where a purchase order includes various distinct products or services with both short-term (one year or less) and long-term (more than a year) performance periods, the cost of commissions incurred for the total value of the purchase order is capitalized and subsequently amortized as each performance obligation is recognized.

For the additional disclosures on capitalized contract acquisition costs, see Note 2 below.

Warranty Accruals

Ciena provides for the estimated costs to fulfill customer warranty obligations upon recognition of the related revenue. Estimated warranty costs include estimates for material costs, technical support labor costs and associated overhead. Warranty is included in cost of goods sold and is determined based on actual warranty cost experience, estimates of component failure rates and management’s industry experience. Ciena’s sales contracts do not permit the right of return of the product by the customer after the product has been accepted.

Accounts Receivable, Net

Ciena’s allowance for doubtful accounts receivable is based on its assessment, on a specific identification basis, of the collectibility of customer accounts. Ciena performs ongoing credit evaluations of its customers and generally has not required collateral or other forms of security from them. In determining the appropriate balance for Ciena’s allowance for doubtful accounts receivable, management considers each individual customer account receivable in order to determine collectibility. In doing so, management considers creditworthiness, payment history, account activity and communication with the customer. If a customer’s financial condition changes, or if actual defaults are higher than Ciena’s historical experience, Ciena may be required to take a charge for an allowance for doubtful accounts receivable, which could have an adverse impact on its results of operations.

Research and Development

Ciena charges all research and development costs to expense as incurred. Types of expense incurred in research and development include employee compensation, prototype equipment, consulting and third-party services, depreciation, facility costs and information technology.

Government Grants

Ciena accounts for proceeds from government grants as a reduction of expense when there is reasonable assurance that Ciena has met the required conditions associated with the grant and that grant proceeds will be received. Grant benefits are recorded to the particular line item of the Consolidated Statement of Operations to which the grant activity relates. See Note 26 below.

Advertising Costs

Ciena expenses all advertising costs as incurred.

Legal Costs

Ciena expenses legal costs associated with litigation as incurred.

Share-Based Compensation Expense

Ciena measures and recognizes compensation expense for share-based awards based on estimated fair values on the date of grant. Ciena estimates the fair value of each option-based award on the date of grant using the Black-Scholes option-pricing model. This model is affected by Ciena’s stock price as well as estimates regarding a number of variables, including expected stock price volatility over the expected term of the award and projected employee stock option exercise behaviors. Ciena recognizes the estimated fair value of restricted stock units subject only to service-based vesting conditions by multiplying the number of shares underlying the award by the closing price per share of Ciena common stock on the grant date. In each case, Ciena only recognizes expense in its Consolidated Statement of Operations for those stock options or restricted stock units that are expected ultimately to vest. Awards with performance-based vesting conditions (i) require the achievement of certain operational, financial or other performance criteria or targets or (ii) vest based on Ciena’s total shareholder return as compared to an index of peer companies, in whole or in part. Ciena recognizes the estimated fair value of restricted stock units subject to performance-based vesting conditions other than total shareholder return by assuming the satisfaction of any performance-based objectives at the “target” level and multiplying the corresponding number of shares earned based upon such achievement by the closing price per share of Ciena common stock on the grant date. Ciena recognizes the estimated fair value of performance based awards subject to total shareholder return as compared to an index of peer companies using a Monte Carlo simulation valuation model on the date of grant. At the end of each reporting period, Ciena reassesses the probability of achieving the performance targets and the performance period required to meet those targets. See Note 23 below.

Stock Repurchase Plan

Due to the continued uncertainty surrounding the duration and severity of potential macroeconomic impacts of COVID-19, Ciena considered it prudent to temporarily suspend purchases of its common stock under its stock repurchase program effective as of March 17, 2020. See Note 27 below for information related to the resumption of purchases under this plan in fiscal 2021.

Income Taxes

Ciena accounts for income taxes using an asset and liability approach. This approach recognizes deferred tax assets and liabilities (“DTA”) for the expected future tax consequences attributable to differences between the carrying amounts of assets and liabilities for financial reporting purposes and their respective tax bases, and for operating loss and tax credit carryforwards. In estimating future tax consequences, Ciena considers all expected future events other than the enactment of changes in tax laws or rates. Valuation allowances are provided if, based on the weight of the available evidence, it is more likely than not that some or all of the deferred tax assets will not be realized.

In the ordinary course of business, transactions occur for which the ultimate outcome may be uncertain. In addition, tax authorities periodically audit Ciena’s income tax returns. These audits examine significant tax filing positions, including the timing and amounts of deductions and the allocation of income tax expenses among tax jurisdictions. Ciena is currently under audit in India for 2012 and 2014 through 2018, in Canada for 2013 through 2015, and in the United Kingdom for 2014 through 2018. Management does not expect the outcome of these audits to have a material adverse effect on Ciena’s consolidated financial position, results of operations or cash flows. Ciena’s major tax jurisdictions and the earliest open tax years are as follows: United States (2017), United Kingdom (2014), Canada (2013), and India (2012). Limited adjustments can be made to federal U.S. tax returns in earlier years in order to reduce net operating loss carryforwards. Ciena classifies interest and penalties related to uncertain tax positions as a component of income tax expense.

Ciena has not provided for U.S. deferred income taxes on the cumulative unremitted earnings of its non-U.S. affiliates, as it plans to indefinitely reinvest these foreign earnings outside the U.S. As of October 31, 2020, the cumulative amount of such temporary differences for which a deferred tax liability has not been recognized totaled approximately $375.0 million. If these earnings were distributed to the U.S. in the form of dividends, or otherwise, or if the shares of the relevant foreign subsidiaries were sold or otherwise transferred, Ciena would be subject to additional U.S. income taxes (subject to an adjustment for foreign tax credits) and foreign withholding taxes.

Ciena is required to record excess tax benefits or tax deficiencies related to stock-based compensation as income tax benefit or expense when share-based awards vest or are settled.

Ciena adopted ASU 2016-09, Improvements to Employee Share-Based Payment Accounting, in the first quarter of fiscal 2018. In connection with the adoption of this guidance, Ciena recognized approximately $62.1 million of deferred tax assets related to previously unrecognized tax benefits. This was recorded as a cumulative-effect adjustment to retained earnings as of the beginning of the first quarter of fiscal 2018.

The Tax Cuts and Jobs Act (the “Tax Act”) includes provisions that affected Ciena in fiscal 2019 and fiscal 2020, including a provision designed to tax global intangible low-taxed income (“GILTI”). An accounting policy choice is allowed to either treat taxes due on future U.S. inclusions related to GILTI in taxable income as a current-period expense when incurred (the “period cost method”) or factor such amounts into the measurement of deferred taxes (the “deferred method”). The calculation of the deferred balance with respect to the GILTI tax provisions will depend, in part, on analyzing global income to determine whether future U.S. inclusions in taxable income are expected related to GILTI and, if so, what the impact is expected to be. Ciena is electing to use the period cost method for future GILTI inclusions. Additionally, Ciena is electing to use the incremental cash tax savings approach when determining whether a valuation allowance needs to be recorded against the U.S. net operating loss (“NOL”) due to the GILTI inclusions.

The Tax Act also introduced an alternative tax known as the base erosion and anti-abuse tax (“BEAT”). An accounting policy choice has been made to consider BEAT as a period cost when incurred.

Loss Contingencies

Ciena is subject to the possibility of various losses arising in the ordinary course of business. These may relate to disputes, litigation and other legal actions. Ciena considers the likelihood of loss or the incurrence of a liability, as well as Ciena’s ability to estimate the amount of loss reasonably, in determining loss contingencies. An estimated loss contingency is accrued when it is probable that a liability has been incurred and the amount of loss can be reasonably estimated. Ciena regularly evaluates

current information available to it in order to determine whether any accruals should be adjusted and whether new accruals are required.

Fair Value of Financial Instruments

The carrying value of Ciena’s cash and cash equivalents, accounts receivable, accounts payable and accrued liabilities approximates fair market value due to the relatively short period of time to maturity. For information related to the fair value of Ciena’s term loan, see Note 18 below.

Fair value for the measurement of financial assets and liabilities is defined as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. As such, fair value is a market-based measurement that should be determined based on assumptions that market participants would use in pricing an asset or liability. Ciena utilizes a valuation hierarchy for disclosure of the inputs for fair value measurement. This hierarchy prioritizes the inputs into three broad levels as follows:

•Level 1 inputs are unadjusted quoted prices in active markets for identical assets or liabilities;

•Level 2 inputs are quoted prices for identical or similar assets or liabilities in less active markets or model-derived valuations in which significant inputs are observable for the asset or liability, either directly or indirectly through market corroboration, for substantially the full term of the financial instrument; and

•Level 3 inputs are unobservable inputs based on Ciena’s assumptions used to measure assets and liabilities at fair value. The fair values are determined based on model-based techniques using inputs Ciena could not corroborated with market data.

By distinguishing between inputs that are observable in the marketplace, and therefore more objective, and those that are unobservable, and therefore more subjective, the hierarchy is designed to indicate the relative reliability of the fair value measurements. A financial asset’s or liability’s classification within the hierarchy is determined based on the lowest level input that is significant to the fair value measurement.

Restructuring

From time to time, Ciena takes actions to better align its workforce, facilities and operating costs with perceived market opportunities, business strategies and changes in market and business conditions and redesign business processes. Ciena recognizes a liability for the cost associated with an exit or disposal activity in the period in which the liability is incurred, except for one-time employee termination benefits related to a service period, typically of more than 60 days, which are accrued over the service period. See Note 4 below.

Foreign Currency

Certain of Ciena’s foreign branch offices and subsidiaries use the U.S. Dollar as their functional currency because Ciena Corporation, as the U.S. parent entity, exclusively funds the operations of these branch offices and subsidiaries. For those subsidiaries using the local currency as their functional currency, assets and liabilities are translated at exchange rates in effect at the balance sheet date, and the statement of operations is translated at a monthly average rate. Resulting translation adjustments are recorded directly to a separate component of stockholders’ equity. Where the monetary assets and liabilities are transacted in a currency other than the entity’s functional currency, re-measurement adjustments are recorded in interest and other income (loss), net on the Consolidated Statement of Operations. See Note 5 below.

Derivatives

Ciena’s 3.75% Convertible Senior Notes due October 15, 2018 (the “New Notes”) included a conversion feature that was accounted for as a separate embedded derivative. The embedded conversion feature was recorded at fair value using the underlying stock price, time to maturity and expected volatility of Ciena’s stock and conversion price. These changes are included in interest and other income (loss), net on the Consolidated Statement of Operations. On November 15, 2018, Ciena settled this embedded conversion feature.

From time to time, Ciena uses foreign currency forward contracts to reduce variability in certain forecasted non-U.S. Dollar denominated cash flows. Generally, these derivatives have maturities of 24 months or less. Ciena also has interest rate swap arrangements to reduce variability in certain forecasted interest expense associated with its term loan. All of these derivatives

are designated as cash flow hedges. At the inception of the cash flow hedge, and on an ongoing basis, Ciena assesses whether the derivative has been effective in offsetting changes in cash flows attributable to the hedged risk during the hedging period. The derivative’s net gain or loss is initially reported as a component of accumulated other comprehensive income (loss), and, upon occurrence of the forecasted transaction, is subsequently reclassified to the line item in the Consolidated Statement of Operations to which the hedged transaction relates.

Ciena records derivative instruments in the Consolidated Statements of Cash Flows within operating, investing, or financing activities consistent with the cash flows of the hedged items.

From time to time, Ciena uses foreign currency forward contracts to hedge certain balance sheet foreign exchange exposures. These forward contracts are not designated as hedges for accounting purposes, and any net gain or loss associated with these derivatives is reported in interest and other income (loss), net on the Consolidated Statement of Operations.

See Notes 7 and 15 below.

Computation of Net Income (Loss) per Share

Ciena calculates basic earnings per share by dividing earnings attributable to common stock by the weighted average number of common shares outstanding for the period. Diluted net income (loss) per potential common share (“Diluted EPS”) includes other potential dilutive shares that would be outstanding if securities or other contracts to issue common stock were exercised or converted into common stock. Ciena uses a dual presentation of basic net income (loss) per common share (“Basic EPS”) and Diluted EPS on the face of its income statement. A reconciliation of the numerator and denominator used for the Basic EPS and Diluted EPS computations is set forth in Note 20 below.

Software Development Costs

Ciena develops software for sale to its customers. GAAP requires the capitalization of certain software development costs that are incurred subsequent to the date technological feasibility is established and prior to the date the product is generally available for sale. The capitalized cost is then amortized using the straight-line method over the estimated life of the product. Ciena defines technological feasibility as being attained at the time a working model is completed. To date, the period between Ciena achieving technological feasibility and the general availability of such software has been short, and software development costs qualifying for capitalization have been insignificant. Accordingly, Ciena has not capitalized any software development costs.

Newly Issued Accounting Standards - Effective

Leases

In February 2016, FASB issued ASC 842, Leases, which requires an entity to recognize assets and liabilities on the balance sheet for the rights and obligations created by leased assets and to provide additional disclosures. Effective November 3, 2019, Ciena adopted ASC 842, which requires right-of-use ("ROU") assets and lease liabilities to be recorded on the balance sheet, on a modified retrospective basis, such that related amounts in prior periods have not been restated.

As a practical expedient for disclosure, Ciena has elected the “package of practical expedients” and, as a result, did not reassess existing lease identifications, lease classifications or initial direct costs. As a practical expedient, Ciena has elected not to capitalize leases with a term of 12 months or less without a purchase option that it is likely to exercise. Also as a practical expedient, Ciena has elected not to separate lease and non-lease components of operating and finance leases. Lease components are payment items directly attributable to the use of the underlying asset, while non-lease components are explicit elements of a contract not directly related to the use of the underlying asset, including pass-through operating expenses like common area maintenance and utilities. In connection with its adoption of ASC 842, Ciena has implemented new accounting policies and processes, and incorporated such into its existing internal control environment as necessary to support the requirements of ASC 842.

Upon adoption, Ciena recorded Operating ROU assets of $53.3 million and lease liabilities of $76.0 million related to its operating leases. As of November 2, 2019, the restructuring reserve liability for vacated office space of $11.1 million was included in Accrued liabilities and other short-term obligations and Other long-term obligations on the Consolidated Balance Sheet under prior accounting guidance. Upon adoption of ASC 842, the existing lease reserve liability was reclassified as a reduction to the Operating ROU assets. ROU assets will be tested for impairment when circumstances indicate that the carrying

values may not be recoverable. The adoption of this guidance did not require a cumulative effect adjustment or have an impact on the Consolidated Statements of Operations or Consolidated Statements of Cash Flows.

Opening Balance Adjustments

The following table summarizes the cumulative effect of the changes made to Ciena’s Consolidated Balance Sheet in connection with the adoption of ASC 842 (in thousands):


	Balance at November 2, 2019		New Lease Accounting Standard			Adjusted Balance at November 3, 2019
ASSETS:
Operating right-of-use assets	$	—	$	53,334	(1)	$	53,334

Total assets	$	3,893,346	$	53,334		$	3,946,680

LIABILITIES AND STOCKHOLDERS’ EQUITY:
Accrued liabilities and other short-term obligations	$	382,740	$	(1,484)	(2)	$	381,256
Short-term lease liabilities	$	—	20,498		(3)	$	20,498
Other long-term obligations	$	148,747	(21,244)		(4)	$	127,503
Long-term operating lease liabilities	$	—	55,564		(5)	$	55,564

Total liabilities and stockholders’ equity	$	3,893,346	$	53,334		$	3,946,680

(1) Represents $76.0 million of operating leases recognized as Operating ROU assets upon adoption of ASC 842, less $5.4 million of deferred rent, $6.2 million of tenant improvement allowances, $1.5 million of short-term restructuring reserve liability and $9.6 million of long-term restructuring reserve liability all recognized as a reduction to ROU assets.

(2) Represents $1.5 million of short-term restructuring reserve liability recognized as a reduction to Operating ROU assets.

(3) Represents $20.5 million of lease liabilities for operating leases.

(4) Represents $9.6 million of long-term restructuring reserve liability, $5.4 million of deferred rent, and $6.2 million of tenant improvement allowances recognized as a reduction to ROU assets.

(5) Represents $55.6 million of lease liabilities for operating leases.

See Note 17 below for additional information.

Fair Value Measurement

In August 2018, the FASB issued ASU No. 2018-13 (“ASU 2018-13”), Fair Value Measurement (Topic 820): Disclosure Framework which modifies the disclosure requirements on fair value measurements. ASU 2018-13 is effective for Ciena beginning in the first quarter of fiscal year 2020, and early adoption is permitted. Adoption of ASU 2018-13 did not have a material effect on Ciena’s financial position or results of operations.

Newly Issued Accounting Standards - Not Yet Effective

In June 2016, the FASB issued ASU No. 2016-13 (“ASU 2016-13”), Financial Instruments - Credit Losses, which requires measurement and recognition of expected credit losses for financial assets held based on historical experience, current conditions, and reasonable and supportable forecasts that affect the collectability of the reported amount. The new standard replaces the incurred loss impairment model. Under this standard, Ciena will be required to use a forward-looking expected credit loss model for accounts receivable, contract assets, and other financial instruments. ASU 2016-13 is effective for Ciena beginning in the first quarter of fiscal 2021 on a modified retrospective basis with the cumulative effect of adoption recorded as an adjustment to retained earnings. This standard will not have a material impact on Ciena’s Consolidated Financial Statements and disclosures at adoption.

Revenue

12 Months Ended

Oct. 31, 2020

Revenue from Contract with Customer [Abstract]

REVENUE

REVENUEDisaggregation of Revenue

Ciena’s disaggregated revenue represents similar groups that depict the nature, amount, and timing of revenue and cash flows for Ciena’s various offerings. The sales cycle, contractual obligations, customer requirements, and go-to-market strategies may differ for each of its product categories, resulting in different economic risk profiles for each category.

The tables below set forth Ciena’s disaggregated revenue for the respective period (in thousands):


	Year Ended October 31, 2020
	Networking Platforms		Platform Software and Services		Blue Planet Automation Software and Services		Global Services		Total
Product lines:
Converged Packet Optical	$	2,547,647	$	—	$	—	$	—	$	2,547,647
Packet Networking	267,416		—		—		—		267,416
Platform Software and Services	—		197,809		—		—		197,809
Blue Planet Automation Software and Services	—		—		62,632		—		62,632
Maintenance Support and Training	—		—		—		269,354		269,354
Installation and Deployment	—		—		—		152,003		152,003
Consulting and Network Design	—		—		—		35,296		35,296
Total revenue by product line	$	2,815,063	$	197,809	$	62,632	$	456,653	$	3,532,157

Timing of revenue recognition:
Products and services at a point in time	$	2,815,063	$	69,099	$	19,583	$	14,363	$	2,918,108
Products and services transferred over time	—		128,710		43,049		442,290		614,049
Total revenue by timing of revenue recognition	$	2,815,063	$	197,809	$	62,632	$	456,653	$	3,532,157


	Year Ended November 2, 2019
	Networking Platforms		Platform Software and Services		Blue Planet Automation Software and Services		Global Services		Total
Product lines:
Converged Packet Optical	$	2,562,841	$	—	$	—	$	—	$	2,562,841
Packet Networking	348,477		—		—		—		348,477
Platform Software and Services	—		155,376		—		—		155,376
Blue Planet Automation Software and Services	—		—		54,555		—		54,555
Maintenance Support and Training	—		—		—		261,337		261,337
Installation and Deployment	—		—		—		148,233		148,233
Consulting and Network Design	—		—		—		41,312		41,312
Total revenue by product line	$	2,911,318	$	155,376	$	54,555	$	450,882	$	3,572,131

Timing of revenue recognition:
Products and services at a point in time	$	2,911,318	$	55,530	$	17,697	$	18,802	$	3,003,347
Products and services transferred over time	—		99,846		36,858		432,080		568,784
Total revenue by timing of revenue recognition	$	2,911,318	$	155,376	$	54,555	$	450,882	$	3,572,131

Effective the beginning of fiscal 2020, Ciena’s Global Sales and Marketing organization combined its previous North America and CALA regions into a new “Americas” sales region. Accordingly, Ciena reflects its sales geographically around the following markets: (i) Americas; (ii) EMEA; and (iii) APAC. Within each geographic area, Ciena maintains specific teams or personnel that focus on a particular region, country, customer or market vertical. These teams include sales management, account salespersons and sales engineers, as well as services professionals and commercial management personnel.

For the periods below, Ciena’s geographic distribution of revenue was as follows (in thousands):


	Year Ended
	October 31, 2020		November 2, 2019
Geographic Distribution:
Americas	$	2,469,278	$	2,503,913
EMEA	591,468		566,718
APAC	471,411		501,500
Total revenue by geographic distribution	$	3,532,157	$	3,572,131

•Networking Platforms revenue reflects sales of Ciena’s Converged Packet Optical and Packet Networking product lines.

•Converged Packet Optical - includes the 6500 Packet-Optical Platform, Waveserver® stackable interconnect system, the 6500 Reconfigurable Line System (RLS) and the 5400 family of Packet-Optical Platforms. This product line also includes sales of the Z-Series Packet-Optical Platform.

•Packet Networking - includes the 3000 family of service delivery switches and service aggregation switches and the 5000 family of service aggregation switches. This product line also includes the 8700 Packetwave Platform, the Ethernet packet configuration for the 5410 Service Aggregation Switch, and the 6500 Packet Transport System (PTS), which combines packet switching, control plane operation, and integrated optics.

The Networking Platforms segment revenue also includes sales of operating system software and enhanced software features embedded in each of the product lines above. Revenue from this segment is included in product revenue on the Consolidated Statements of Operations. Operating system software and enhanced software features embedded in Ciena hardware are considered distinct performance obligations for which the revenue is generally recognized upfront at a point in time upon transfer of control.

•Platform Software and Services provides analytics, data, and planning tools to assist customers in managing Ciena’s Networking Platforms products in their networks. Ciena’s platform software includes its Manage, Control and Plan (MCP) domain controller solution, OneControl Unified Management System, as well as planning tools and a number of legacy software solutions that support our installed base of network solutions. Platform software-related services revenue includes sales of subscription, installation, support, and consulting services related to Ciena’s software platforms, operating system software and enhanced software features embedded in each of the Networking Platforms product lines above. Revenue from the software portion of this segment is included in product revenue on the Consolidated Statements of Operations. Revenue from services portions of this segment is included in services revenue on the Consolidated Statements of Operations.

•Blue Planet Automation Software and Services is a comprehensive, micro-services, standards-based open software suite, together with related services, that enables customers to implement large-scale software and IT-led OSS transformations by transforming legacy networks into “service ready” networks, accelerating the creation, delivery and lifecycle management of new, cloud-based services. Ciena’s Blue Planet Automation Platform includes multi-domain service orchestration (MDSO), inventory management (BPI), route optimization and analysis (ROA), network function virtualization orchestration (NFVO), and unified assurance and analytics (UAA). Services revenue includes sales of subscription, installation, support, consulting and design services related to Ciena’s Blue Planet Automation Platform. Revenue from the software portion of this segment is included in product revenue on the Consolidated Statements of Operations. Revenue from services portions of this segment is included in services revenue on the Consolidated Statements of Operations.

Ciena’s software platform revenue typically reflects either perpetual or term-based software licenses, and these sales are considered a distinct performance obligation where revenue is generally recognized upfront at a point in time upon transfer of control. Revenue from software subscription and support are recognized ratably over the period during which the services are performed. Revenue from professional services for solution customization, software and solution support services, consulting and design, and build-operate-transfer services relating to Ciena’s software offerings are recognized over time with Ciena applying the input method to determine the amount of revenue to be recognized in a given period.

•Global Services reflects sales of a broad range of Ciena’s services for maintenance support and training, installation and deployment, and consulting and network design activities. Revenue from this segment is included in services revenue on the Consolidated Statements of Operations.

Ciena’s Global Services are considered a distinct performance obligation where revenue is generally recognized over time. Revenue from maintenance support is recognized ratably over the period during which the services are performed. Revenue from installation and deployment services and consulting and network design services are recognized over time with Ciena applying the input method to determine the amount of revenue to be recognized in a given period. Revenue from training services is generally recognized at a point in time upon completion of the service.

Contract Balances

The following table provides information about receivables, contract assets and contract liabilities (deferred revenue) from contracts with customers (in thousands):


	Balance at October 31, 2020		Balance at November 2, 2019
Accounts receivable, net	$	719,405	$	724,854
Contract assets for unbilled accounts receivable	$	85,843	$	84,046
Deferred revenue	$	158,363	$	156,873

Our contract assets represent unbilled accounts receivable where transfer of a product or service has occurred but invoicing is conditional upon completion of future performance obligations. These amounts are primarily related to installation and deployment and professional services arrangements where transfer of control has occurred, but Ciena has not yet invoiced the customer. Contract assets are included in prepaid expenses and other current assets in the Consolidated Balance Sheets. See Note 10 below.

Contract liabilities consist of deferred revenue and represent advanced payments against non-cancelable customer orders received prior to revenue recognition. Ciena recognized approximately $101.9 million and $95.1 million of revenue during fiscal 2020 and 2019, respectively, that was included in the deferred revenue balance at November 3, 2019 and November 4, 2018, respectively. Revenue recognized due to changes in transaction price from performance obligations satisfied or partially satisfied in previous periods was immaterial during fiscal 2020 and 2019.

Capitalized Contract Acquisition Costs

Capitalized contract acquisition costs consist of deferred sales commissions and were $15.3 million and $15.7 million as of October 31, 2020 and November 2, 2019, respectively, and are included in other current assets and other assets. The amortization expense associated with these costs was $22.4 million and $18.6 million during fiscal 2020 and fiscal 2019, respectively, and are included in sales and marketing expense.

Remaining Performance Obligations

Remaining Performance Obligations (“RPO”) are comprised of non-cancelable customer purchase orders for products and services that are awaiting transfer of control for revenue recognition under the applicable contract terms. As of October 31, 2020, the aggregate amount of RPO was $1.0 billion. As of October 31, 2020, Ciena expects approximately 81% of the RPO to be recognized as revenue within the next twelve months.

- Definition

The entire disclosure of revenue from contract with customer to transfer good or service and to transfer nonfinancial asset. Includes, but is not limited to, disaggregation of revenue, credit loss recognized from contract with customer, judgment and change in judgment related to contract with customer, and asset recognized from cost incurred to obtain or fulfill contract with customer. Excludes insurance and lease contracts.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-URI http://asc.fasb.org/topic&trid=49130388

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 10
-URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130551-203045

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 13
-Subparagraph (b)(2)
-URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130556-203045

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 12
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130554-203045

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 9
-URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130550-203045

Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 12
-Subparagraph (e)
-URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130554-203045

Reference 7: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 12
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130554-203045

Reference 8: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 12
-Subparagraph (d)
-URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130554-203045

Reference 9: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 15
-URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130558-203045

Reference 10: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 12
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130554-203045

+ Details

Business Combinations

12 Months Ended

Oct. 31, 2020

Business Combinations [Abstract]

BUSINESS COMBINATIONS

Centina Systems, Inc. Acquisition

On November 2, 2019, Ciena acquired Centina Systems, Inc. (“Centina”), a provider of service assurance analytics and network performance management solutions, for approximately $34.0 million in cash. This transaction has been accounted for as the acquisition of a business.

During fiscal 2020, Ciena incurred approximately $0.8 million of acquisition-related costs associated with this transaction. These costs primarily reflect fees associated with financial, legal and accounting advisors.

The following table summarizes the final purchase price allocation related to the acquisition based on the estimated fair value of the acquired assets and assumed liabilities (in thousands):


	Amount
Cash and cash equivalents	$	5,718
Accounts receivable	610
Prepaid expenses and other	536
Equipment, furniture and fixtures	17
Goodwill	13,055
Customer relationships and contracts	400
Developed technology	22,200
Accounts payable	(47)
Accrued liabilities	(286)
Deferred revenue	(1,493)
Deferred tax liability	(6,692)
Total purchase consideration	$	34,018

Customer relationships and contracts represent agreements with existing Centina customers and have an estimated useful life of two years.

Developed technology represents purchased technology that has reached technological feasibility and for which Centina had substantially completed development as of the date of acquisition. Fair value was determined using future discounted cash flows related to the projected income stream of the developed technology for a discrete projection period. Cash flows were discounted to their present value as of the closing date. Developed technology is amortized on a straight-line basis over its estimated useful life of five years.

The goodwill generated from the acquisition of Centina is primarily related to expected synergies. The total goodwill amount was recorded in the Blue Planet Automation Software and Services segment. The goodwill is not deductible for income tax purposes.

Pro forma disclosures have not been included due to immateriality.

DonRiver Acquisition

On October 1, 2018, Ciena acquired Don River Holdings, LLC (“ DonRiver”), a global software and services company specializing in federated network and service inventory management solutions within the service provider Operational Support Systems (OSS) environment. This transaction has been accounted for as the acquisition of a business.

During fiscal 2020, fiscal 2019 and fiscal 2018, Ciena incurred approximately $6.9 million, $7.5 million and $3.5 million, respectively. These costs and expenses include fees associated with financial, legal and accounting advisors, severance and other employee-related costs associated with our acquisition of DonRiver, including the contingent compensation portion of the three year earn-out agreement as described below. These costs were recorded in acquisition and integration costs in the Consolidated Statement of Operations.

The following table summarizes the purchase price for the acquisition (in thousands):


	Amount
Cash	$	43,283
Contingent consideration	10,900
Total purchase price	$	54,183

The following table summarizes the final purchase price allocation related to the acquisition based on the estimated fair value of the acquired assets and assumed liabilities (in thousands):


	Amount
Cash and cash equivalents	$	1,025
Accounts receivable	4,790
Prepaid expenses and other long-term assets	372
Goodwill	10,453
Customer relationships and contracts	37,700
Developed technology	9,700


Deferred revenue	(193)
Other current and long-term liabilities	(9,664)
Total purchase price	$	54,183

The acquisition of DonRiver included a $28.5 million three-year earn-out arrangement that consisted of both a contingent consideration element and a contingent compensation element. The contingent consideration element required additional cash consideration to be paid based on the future revenues generally derived from the DonRiver business over a 25-month period from the acquisition date through October 31, 2020. The undiscounted amounts potentially payable by Ciena under the contingent consideration element ranged from $0.0 million to $15.0 million in the aggregate over the period. The $10.9 million fair value of the contingent consideration element as of the acquisition date was estimated by applying the income approach based on a discounted cash flow technique using Monte Carlo simulations. See Note 7 below. The contingent compensation element of the earn-out arrangement included an employment condition for the selling shareholders who became employees of Ciena upon the completion of the acquisition. The range of amounts that Ciena could pay under the contingent compensation element is between $0.0 million and $13.5 million in the aggregate over the period. These amounts are accrued over the period earned and recorded as expense in the acquisition and integration costs line item in the Consolidated Statement of Operations. During fiscal 2020, fiscal 2019 and fiscal 2018, Ciena recorded $6.9 million, $5.1 million and $0.4 million, of contingent compensation associated with the earn-out arrangement, respectively.

The contingent consideration liability established at closing had an acquisition date fair value of $10.9 million. As of November 2, 2019, the fair value of the contingent consideration liability was $8.1 million. During fiscal 2020 and fiscal 2019, decreases of $3.7 million and $2.8 million, respectively, were recorded as reductions to expense in the acquisition and integration cost line item in the Consolidated Statement of Operations. During fiscal 2019, $4.4 million of the total contingent consideration liability was earned. This payment was paid during the first quarter of fiscal 2020. As of October 31, 2020, no contingent consideration liability remained.

Customer relationships and contracts represent agreements with existing DonRiver customers. Customer relationships and contracts are amortized on a straight-line basis over their estimated useful life of seven years. Fair value was determined using the multi-period excess earnings method based on the present value of the incremental after-tax cash flows (or “excess earnings”) attributable to customer relationships for a discrete projection period.

Developed technology represents purchased technology that had reached technological feasibility and for which DonRiver had substantially completed development as of the date of acquisition. Fair value was determined using future discounted cash flows related to the projected income stream of the developed technology for a discrete projection period. Cash flows were discounted to their present value as of the closing date. Developed technology is amortized on a straight-line basis over its estimated useful life of seven years.

The goodwill generated from the acquisition of DonRiver is primarily related to expected synergies. The total goodwill amount was recorded in the previous Software and Software-Related Services segment. The goodwill related to this acquisition is not deductible for tax purposes.

Pro forma disclosures have not been included due to immateriality.

Packet Design Acquisition

On July 2, 2018, Ciena acquired Packet Design, a provider of network performance management software focused on Layer 3 network optimization, topology and route analytics, in a cash transaction for approximately $41.1 million in cash. This transaction has been accounted for as the acquisition of a business.

During fiscal 2018, Ciena incurred approximately $1.6 million of acquisition-related costs associated with this transaction. There were minimal acquisition-related costs associated with this transaction during fiscal 2019. These costs and expenses include fees associated with financial, legal and accounting advisors and severance and other employment-related costs, including payments to certain former Packet Design employees.

The following table summarizes the final purchase price allocation related to the acquisition based on the estimated fair value of the acquired assets and assumed liabilities (in thousands):


	Amount
Cash and cash equivalents	$	642
Accounts receivable	1,525
Prepaid expenses and other	450
Equipment, furniture and fixtures	31
Goodwill	20,304
Customer relationships and contracts	2,200
Developed technology	21,900
Accounts payable	(165)
Accrued liabilities	(657)
Deferred revenue	(5,176)
Total purchase price	$	41,054

Customer relationships and contracts represent agreements with existing Packet Design customers. Customer relationships and contracts are amortized on a straight line basis over their estimated useful life of three years.

Developed technology represents purchased technology that had reached technological feasibility and for which Packet Design had substantially completed development as of the date of acquisition. Fair value was determined using future discounted cash flows related to the projected income stream of the developed technology for a discrete projection period. Cash flows were discounted to their present value as of the closing date. Developed technology is amortized on a straight line basis over its estimated useful life of five years.

The goodwill generated from the acquisition of Packet Design is primarily related to expected synergies. The total goodwill amount was recorded in the previous Software and Software-Related Services segment. The goodwill related to this acquisition is not deductible for tax purposes.

Pro forma disclosures have not been included due to immateriality.

Restructuring Costs

12 Months Ended

Oct. 31, 2020

Restructuring and Related Activities [Abstract]

RESTRUCTURING COSTS

Ciena has undertaken a number of restructuring activities intended to reduce expense and better align its workforce and costs with market opportunities, product development and business strategies. The following table sets forth the restructuring activity and balance of the restructuring liability accounts, which are included in Accrued liabilities and other short-term obligations on Ciena’s Consolidated Balance Sheets, for the fiscal years indicated (in thousands):


	Workforce reduction			Consolidation of excess facilities and other restructuring activities			Total
Balance at October 28, 2017	$	1,291		$	1,648		$	2,939
Charges	14,853		(1)	3,890		(4)	18,743


Cash payments	(14,036)			(3,799)			(17,835)
Balance at November 3, 2018	2,108			1,739			3,847
Charges	13,779		(2)	10,759		(5)	24,538


Cash payments	(11,904)			(1,338)			(13,242)
Balance at November 2, 2019	3,983			11,160			15,143
Charges	7,282		(3)	15,370		(6)	22,652

Adjustments related to ASC 842	—			(11,160)		(7)	(11,160)
Cash payments	(8,350)			(15,370)			(23,720)
Balance at October 31, 2020	$	2,915		$	—		$	2,915
Current restructuring liabilities	$	2,915		$	—		$	2,915
Non-current restructuring liabilities	$	—		$	—		$	—

_________________________________

(1) During fiscal 2018, Ciena recorded a charge of $14.9 million of severance and other employee-related costs associated with a workforce reduction of approximately 240 employees.

(2) During fiscal 2019, Ciena recorded a charge of $13.8 million of severance and other employee-related costs associated with a workforce reduction of approximately 283 employees.

(3) During fiscal 2020, Ciena recorded a charge of $7.3 million of severance and other employee-related costs associated with a workforce reduction of approximately 149 employees.

(4) Reflects unfavorable lease commitments in connection with a portion of facilities located in Petaluma, California and in Gurgaon, India.

(5) Reflects unfavorable lease commitments in connection with a portion of facilities located in Alpharetta, Georgia, Spokane, Washington, Durham, North Carolina and Hanover, Maryland.

(6) Primarily represents costs and imputed interest expense related to restructured facilities and the redesign of certain business processes.

(7) Represents restructuring reserve liability recognized as a reduction to Operating ROU assets, net in relation to adoption of ASC 842. See Notes 1 and 17 for further discussion.

Interest and Other Income (Loss), Net

12 Months Ended

Oct. 31, 2020

Other Income and Expenses [Abstract]

INTEREST AND OTHER INCOME (LOSS), NET

The components of interest and other income (loss), net, were as follows (in thousands):


	Year Ended
	October 31, 2020		November 2, 2019		November 3, 2018
Interest income	$	6,860	$	14,410	$	13,703
Gain on non-hedge designated foreign currency forward contracts	5,551		3		6,791
Foreign currency exchange losses	(13,022)		(9,800)		(19,434)
Loss on fair value of debt conversion liability	—		—		(12,070)
Other	1,575		(737)		(1,019)
Interest and other income (loss), net	$	964	$	3,876	$	(12,029)

Ciena Corporation, as the U.S. parent entity, uses the U.S. Dollar as its functional currency; however, some of its foreign branch offices and subsidiaries use the local currency as their functional currency. During fiscal 2020, 2019 and 2018, Ciena recorded $13.0 million, $9.8 million and $19.4 million, respectively, in exchange rate losses, as a result of monetary assets and liabilities that were transacted in a currency other than the entity’s functional currency, and the related remeasurement adjustments were recorded in interest and other income (loss), net. From time to time, Ciena uses foreign currency forwards to hedge these balance sheet exposures. These forwards are not designated as hedges for accounting purposes, and any net gain or loss associated with these derivatives is also reported in interest and other income (loss), net. During fiscal 2019, Ciena recorded minimal gains from non-hedge designated foreign currency forward contracts. For fiscal 2020 and fiscal 2018, Ciena recorded gains of $5.6 million and $6.8 million, respectively, from non-hedge designated foreign currency forward contracts.

Short-Term and Long-Term Investments

12 Months Ended

Oct. 31, 2020

Investments, Debt and Equity Securities [Abstract]

SHORT-TERM AND LONG-TERM INVESTMENTS

As of October 31, 2020, investments are comprised of the following (in thousands):


	October 31, 2020
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Estimated Fair Value
U.S. government obligations:

Included in short-term investments	$	150,559	$	109	$	(1)	$	150,667
Included in long-term investments	82,252		—		(26)		82,226
	$	232,811	$	109	$	(27)	$	232,893

As of November 2, 2019, investments are comprised of the following (in thousands):


	November 2, 2019
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Estimated Fair Value
U.S. government obligations:
Included in short-term investments	$	109,715	$	225	$	—	$	109,940
Included in long-term investments	10,017		—		(3)		10,014
	$	119,732	$	225	$	(3)	$	119,954

The following table summarizes the legal maturities of debt investments at October 31, 2020 (in thousands):


	October 31, 2020
	Amortized Cost		Estimated Fair Value
Less than one year	$	150,559	$	150,667
Due in 1-2 years	82,252		82,226
	$	232,811	$	232,893

Fair Value Measurements

12 Months Ended

Oct. 31, 2020

Fair Value Disclosures [Abstract]

FAIR VALUE MEASUREMENTS

As of the dates indicated, the following tables summarize the fair value of assets and liabilities that were recorded at fair value on a recurring basis (in thousands):


	October 31, 2020
	Level 1		Level 2		Level 3		Total
Assets:
Money market funds	$	889,293	$	—	$	—	$	889,293
Bond mutual fund	50,361		—		—		50,361
Deferred compensation plan assets	8,213		—		—		8,213
U.S. government obligations	—		232,893		—		232,893

Foreign currency forward contracts	—		82		—		82
Total assets measured at fair value	$	947,867	$	232,975	$	—	$	1,180,842

Liabilities:
Foreign currency forward contracts	$	—	$	681	$	—	$	681
Forward starting interest rate swaps	—		28,513		—		28,513
Total liabilities measured at fair value	$	—	$	29,194	$	—	$	29,194


	November 2, 2019
	Level 1		Level 2		Level 3		Total
Assets:
Money market funds	$	759,114	$	—	$	—	$	759,114
Deferred compensation plan assets	4,974		—		—		4,974
U.S. government obligations	—		119,954		—		119,954

Foreign currency forward contracts	—		1,570		—		1,570
Total assets measured at fair value	$	764,088	$	121,524	$	—	$	885,612

Liabilities:
Foreign currency forward contracts	$	—	$	35	$	—	$	35
Forward starting interest rate swaps	—		21,093		—		21,093
Contingent consideration	—		—		3,705		3,705
Total liabilities measured at fair value	$	—	$	21,128	$	3,705	$	24,833

As of the dates indicated, the assets and liabilities above were presented on Ciena’s Consolidated Balance Sheet as follows (in thousands):


	October 31, 2020
	Level 1		Level 2		Level 3		Total
Assets:
Cash equivalents	$	939,654	$	—	$	—	$	939,654
Short-term investments	—		150,667		—		150,667
Prepaid expenses and other	—		82		—		82
Other long-term assets	8,213		82,226		—		90,439

Total assets measured at fair value	$	947,867	$	232,975	$	—	$	1,180,842

Liabilities:
Accrued liabilities and other short-term obligations	$	—	$	681	$	—	$	681

Other long-term obligations	—		28,513		—		28,513
Total liabilities measured at fair value	$	—	$	29,194	$	—	$	29,194


	November 2, 2019
	Level 1		Level 2		Level 3		Total
Assets:
Cash equivalents	$	759,114	$	—	$	—	$	759,114
Short-term investments	—		109,940		—		109,940
Prepaid expenses and other	—		1,570		—		1,570
Long-term investments	—		10,014		—		10,014
Other long-term assets	4,974		—		—		4,974
Total assets measured at fair value	$	764,088	$	121,524	$	—	$	885,612

Liabilities:
Accrued liabilities and other short-term obligations	$	—	$	35	$	—	$	35
Other long-term obligations	—		21,093		3,705		24,798
Total liabilities measured at fair value	$	—	$	21,128	$	3,705	$	24,833

Ciena did not have any transfers between Level 1 and Level 2 fair value measurements during the periods presented.As of October 31, 2020, none of Ciena’s existing liabilities were classified as Level 3. As of November 2, 2019, Ciena’s Level 3 liability included $3.7 million in accrued liabilities and other short-term obligations. This reflected a contingent consideration element of a three-year payout arrangement associated with Ciena’s purchase of DonRiver in the fourth quarter of fiscal 2018. During the third quarter of fiscal 2020, the total contingent consideration liability was recorded as a reduction to expense in acquisition and integration costs on the Consolidated Statements of Operations to reflect the fair value of the consideration using the income approach. No contingent consideration liability remains in Other long-term obligations on the Consolidated Balance Sheets as of October 31, 2020.

- Definition

The entire disclosure for the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments as well as disclosures related to the fair value of non-financial assets and liabilities. Such disclosures about the financial instruments, assets, and liabilities would include: (1) the fair value of the required items together with their carrying amounts (as appropriate); (2) for items for which it is not practicable to estimate fair value, disclosure would include: (a) information pertinent to estimating fair value (including, carrying amount, effective interest rate, and maturity, and (b) the reasons why it is not practicable to estimate fair value; (3) significant concentrations of credit risk including: (a) information about the activity, region, or economic characteristics identifying a concentration, (b) the maximum amount of loss the entity is exposed to based on the gross fair value of the related item, (c) policy for requiring collateral or other security and information as to accessing such collateral or security, and (d) the nature and brief description of such collateral or security; (4) quantitative information about market risks and how such risks are managed; (5) for items measured on both a recurring and nonrecurring basis information regarding the inputs used to develop the fair value measurement; and (6) for items presented in the financial statement for which fair value measurement is elected: (a) information necessary to understand the reasons for the election, (b) discussion of the effect of fair value changes on earnings, (c) a description of [similar groups] items for which the election is made and the relation thereof to the balance sheet, the aggregate carrying value of items included in the balance sheet that are not eligible for the election; (7) all other required (as defined) and desired information.

+ References + Details

Accounts Receivable

12 Months Ended

Oct. 31, 2020

Receivables [Abstract]

ACCOUNTS RECEIVABLE

As of October 31, 2020, no customer accounted for 10.0% of net accounts receivable. As of November 2, 2019, one customer accounted for 12.0% of net accounts receivable. Ciena has not historically experienced a significant amount of bad debt expense. The reduction in Ciena’s allowance for doubtful accounts as of October 31, 2020 compared to November 2, 2019 is primarily due to the final settlement from a significant asset impairment of $12.2 million for a trade receivable related to a single customer in the APAC region recorded in fiscal 2017. The following table summarizes the activity in Ciena’s allowance for doubtful accounts for the fiscal years indicated (in thousands):


Year Ended	Beginning Balance		Provisions		Net Deductions		Ending Balance
November 3, 2018	$	17,580	$	2,700	$	2,902	$	17,378
November 2, 2019	$	17,378	$	6,740	$	4,017	$	20,101
October 31, 2020	$	20,101	$	8,855	$	18,358	$	10,598

Inventories

12 Months Ended

Oct. 31, 2020

Inventory Disclosure [Abstract]

INVENTORIES

As of the dates indicated, inventories are comprised of the following (in thousands):


	October 31, 2020		November 2, 2019
Raw materials	$	119,481	$	99,041
Work-in-process	13,738		13,657
Finished goods	210,050		226,622
Deferred cost of goods sold	40,747		53,051
	384,016		392,371
Reserve for excess and obsolescence	(39,637)		(47,322)
	$	344,379	$	345,049

Ciena writes down its inventory for estimated obsolescence or unmarketable inventory by an amount equal to the difference between the cost of inventory and the estimated net realizable value based on assumptions about future demand, which are affected by changes in Ciena’s strategic direction, discontinuance of a product or introduction of newer versions of products, declines in the sales of or forecasted demand for certain products, and general market conditions. During fiscal 2020, fiscal 2019 and fiscal 2018, Ciena recorded a provision for excess and obsolescence of $24.7 million, $28.1 million, and $30.6 million, respectively, primarily related to a decrease in the forecasted demand for certain Networking Platforms products. Deductions from the provision for excess and obsolete inventory relate to disposal activities.

The following table summarizes the activity in Ciena’s reserve for excess and obsolete inventory for the fiscal years indicated (in thousands):


Year Ended	Beginning Balance		Provisions		Disposals		Ending Balance
November 3, 2018	$	51,206	$	30,615	$	30,883	$	50,938
November 2, 2019	$	50,938	$	28,085	$	31,701	$	47,322
October 31, 2020	$	47,322	$	24,701	$	32,386	$	39,637

Prepaid Expenses and Other

12 Months Ended

Oct. 31, 2020

Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]

PREPAID EXPENSES AND OTHER

PREPAID EXPENSES AND OTHERAs of the dates indicated, prepaid expenses and other are comprised of the following (in thousands):


	October 31, 2020		November 2, 2019
Contract assets for unbilled accounts receivable	$	85,843	$	84,046
Prepaid VAT and other taxes	72,838		84,706
Prepaid expenses	70,647		48,680
Product demonstration equipment, net	44,793		38,900
Other non-trade receivables	21,981		28,136
Capitalized contract acquisition costs	11,296		11,677
Deferred deployment expense	604		125
Derivative assets	82		1,570
Restricted cash	—		74


	$	308,084	$	297,914

Depreciation of product demonstration equipment was $9.0 million, $8.8 million and $9.0 million for fiscal 2020, 2019 and 2018, respectively.

For further discussion on contract assets and capitalized contract acquisition costs, see Note 2 above.

Equipment, Building, Furniture and Fixtures

12 Months Ended

Oct. 31, 2020

Property, Plant and Equipment [Abstract]

EQUIPMENT, BUILDING, FURNITURE AND FIXTURES

As of the dates indicated, equipment, building, furniture and fixtures are comprised of the following (in thousands):


	October 31, 2020		November 2, 2019
Equipment, furniture and fixtures	$	523,231	$	544,012
Building subject to finance lease	70,791		71,760

Leasehold improvements	89,407		94,626
	683,429		710,398
Accumulated depreciation and amortization	(411,052)		(423,514)
	$	272,377	$	286,884

During fiscal 2020, fiscal 2019 and fiscal 2018, Ciena recorded depreciation of equipment, building, furniture and fixtures, and amortization of leasehold improvements of $84.9 million, $78.8 million and $75.3 million, respectively.

Intangible Assets

12 Months Ended

Oct. 31, 2020

Intangible Assets, Net (Excluding Goodwill) [Abstract]

INTANGIBLE ASSETS

As of the dates indicated, intangible assets are comprised of the following (in thousands):


	October 31, 2020						November 2, 2019
	Gross Intangible		Accumulated Amortization		Net Intangible		Gross Intangible		Accumulated Amortization		Net Intangible
Developed technology	$	395,726	$	(335,512)	$	60,214	$	373,526	$	(308,261)	$	65,265

Patents and licenses	3,565		(2,529)		1,036		3,565		(2,244)		1,321
Customer relationships, covenants not to compete, outstanding purchase orders and contracts	374,659		(339,262)		35,397		374,381		(328,186)		46,195
Total intangible assets	$	773,950	$	(677,303)	$	96,647	$	751,472	$	(638,691)	$	112,781

The aggregate amortization expense of intangible assets was $38.6 million, $35.1 million and $25.8 million for fiscal 2020, fiscal 2019 and fiscal 2018, respectively. Expected future amortization of intangible assets for the fiscal years indicated is as follows (in thousands):


Fiscal Year	Amount
2021	$	35,452
2022	29,232
2023	14,422
2024	11,371
2025	6,170

	$	96,647

Goodwill

12 Months Ended

Oct. 31, 2020

Goodwill and Intangible Assets Disclosure [Abstract]

GOODWILL

The following table presents the goodwill allocated to Ciena’s operating segments as of October 31, 2020 and November 2, 2019, as well as the changes to goodwill during fiscal 2020 (in thousands):


	Balance at November 2, 2019		Acquisitions		Impairments		Translation		Balance at October 31, 2020
Platform Software and Services	$	156,191	$	—	$	—	$	—	$	156,191
Blue Planet Automation Software and Services	75,994		13,055		—		—		89,049
Networking Platforms	65,752		—		—		(145)		65,607
Total	$	297,937	$	13,055	$	—	$	(145)	$	310,847

Other Balance Sheet Details

12 Months Ended

Oct. 31, 2020

Balance Sheet Related Disclosures [Abstract]

OTHER BALANCE SHEET DETAILS

As of the dates indicated, other long-term assets are comprised of the following (in thousands):


	October 31, 2020		November 2, 2019
Maintenance spares inventory, net	$	62,077	$	55,482
Cost method equity investments(1)	13,408		10,727
Capitalized contract acquisition costs	4,001		3,994
Deferred debt issuance costs, net(2)	1,596		1,609
Restricted cash	84		42


Other	21,664		17,132
	$	102,830	$	88,986

(1) Ciena recorded an upward adjustment of $2.7 million to the carrying value of cost method equity investments to interest and other income (loss), net on the Consolidated Statements of Operations during the fourth quarter of fiscal 2020.

(2) Deferred debt issuance costs relate to Ciena’s senior secured asset-based revolving credit facility (the “ABL Credit Facility”) entered into during fiscal 2019 and its predecessor credit facility (described in Note 19 below). The amortization of deferred debt issuance costs for the ABL Credit Facility and its predecessor is included in interest expense, and was $0.4 million for fiscal 2020, and $0.3 million for fiscal 2019 and fiscal 2018.

As of the dates indicated, accrued liabilities and other short-term obligations are comprised of the following (in thousands):


	October 31, 2020		November 2, 2019
Compensation, payroll related tax and benefits	$	135,462	$	182,363
Warranty	49,868		48,498
Vacation	26,945		22,290
Finance lease liability	2,836		2,764
Interest payable	672		1,007
Contingent consideration	—		4,372
Other	118,349		121,446
	$	334,132	$	382,740

The following table summarizes the activity in Ciena’s accrued warranty for the fiscal years indicated (in thousands):


Year Ended	Beginning Balance		Current Year Provisions		Settlements		Ending Balance
November 3, 2018	$	42,456	$	20,992	$	18,708	$	44,740
November 2, 2019	$	44,740	$	23,105	$	19,347	$	48,498
October 31, 2020	$	48,498	$	22,417	$	21,047	$	49,868

As of the dates indicated, deferred revenue is comprised of the following (in thousands):


	October 31, 2020		November 2, 2019
Products	$	17,534	$	27,366
Services	140,829		129,507
	158,363		156,873
Less current portion	(108,700)		(111,381)
Long-term deferred revenue	$	49,663	$	45,492

As of the dates indicated, other long-term obligations are comprised of the following (in thousands):


	October 31, 2020		November 2, 2019
Finance lease liability	$	61,565	$	65,284
Interest rate swap liability	28,513		21,093
Income tax liability	16,386		20,546
Deferred tenant allowance	—		6,248
Straight-line rent	—		5,434
Contingent consideration	—		3,705
Other	16,721		26,437
	$	123,185	$	148,747

Derivative Instruments	12 Months Ended
Derivative Instruments	Oct. 31, 2020
Derivative Instruments and Hedging Activities Disclosure [Abstract]
DERIVATIVE INSTRUMENTS	DERIVATIVE INSTRUMENTS Foreign Currency Derivatives During fiscal 2020 and fiscal 2019, Ciena entered into forward contracts to hedge its foreign exchange exposure from its forecasted cash flows in order to reduce the variability in its Canadian Dollar- and Indian Rupee-denominated expense, which principally relates to research and development activities. The notional amount of these contracts was approximately $254.9 million and $197.4 million as of October 31, 2020 and November 2, 2019, respectively. These foreign exchange contracts have maturities of 24 months or less and have been designated as cash flow hedges. During fiscal 2020 and fiscal 2019, Ciena had forward contracts to hedge its foreign exchange exposure in order to reduce the variability in various currencies of certain balance sheet items. The notional amount of these contracts was approximately $212.0 million and $206.0 million as of October 31, 2020 and November 2, 2019. These foreign exchange contracts have maturities of 12 months or less and have not been designated as hedges for accounting purposes. Interest Rate Derivatives Ciena is exposed to floating rates of LIBOR interest on its term loan borrowings (see Note 18 below) and has hedged such risk by entering into floating to fixed interest rate swap arrangements (“interest rate swaps”). The interest rate swaps fix the LIBOR rate of approximately $350.0 million of the principal amount of the New 2025 Term Loan at 2.957% through September 2023. The total notional amount of these interest rate swaps in effect as of October 31, 2020 was $350.0 million. Ciena expects the variable rate payments to be received under the terms of the interest rate swaps to offset exactly the forecasted variable rate payments on the equivalent notional amounts of the term loan. These derivative contracts have been designated as cash flow hedges. Other information regarding Ciena’s derivatives is immaterial for separate financial statement presentation. See Notes 5 and 7 above.

Accumulated Other Comprehensive Income

12 Months Ended

Oct. 31, 2020

Statement of Comprehensive Income [Abstract]

ACCUMULATED OTHER COMPREHENSIVE INCOME

The following table summarizes the changes in accumulated balances of other comprehensive income (“AOCI”), net of tax (in thousands):


	Unrealized Gain/(Loss) on						Cumulative
	Available-for-Sale Securities		Foreign Currency Forward Contracts		Forward Starting Interest Rate Swaps		Foreign Currency Translation Adjustment		Total
Balance at October 28, 2017	$	(451)	$	(1,386)	$	218	$	(9,398)	$	(11,017)
Other comprehensive gain (loss) before reclassifications	26		(3,242)		6,011		686		3,481
Amounts reclassified from AOCI	—		1,568		188		—		1,756
Balance at November 3, 2018	(425)		(3,060)		6,417		(8,712)		(5,780)
Other comprehensive gain (loss) before reclassifications	577		14		(18,948)		(763)		(19,120)
Amounts reclassified from AOCI	—		3,971		(1,155)		—		2,816
Balance at November 2, 2019	152		925		(13,686)		(9,475)		(22,084)
Other comprehensive loss before reclassifications	(107)		(3,891)		(12,302)		(4,174)		(20,474)
Amounts reclassified from AOCI	—		2,747		4,453		—		7,200
Balance at October 31, 2020	$	45	$	(219)	$	(21,535)	$	(13,649)	$	(35,358)

All amounts reclassified from AOCI related to settlement (gains) losses on foreign currency forward contracts designated as cash flow hedges impacted revenue, research and development expense or sales and marketing expense on the Consolidated Statements of Operations. All amounts reclassified from AOCI related to settlement (gains) losses on forward starting interest rate swaps designated as cash flow hedges impacted interest and other income (loss), net on the Consolidated Statements of Operations.

Leases

12 Months Ended

Oct. 31, 2020

Leases [Abstract]

Leases

LEASES

Ciena leases over 1.3 million square feet of facilities globally related to the ongoing operations of its business segments and related functions. Ciena’s principal executive offices are located in Hanover, Maryland. Ciena’s largest facilities are research and development centers located in Ottawa, Canada and Gurgaon, India. Ciena also has engineering and/or service delivery facilities located in San Jose, California; Alpharetta, Georgia; Quebec, Canada; Austin, Texas; and Pune and Bangalore, India. In addition, Ciena leases various smaller offices in regions throughout the world to support sales and services operations. Office facilities are leased under various non-cancelable operating or finance leases. Ciena's current leases have remaining terms that vary up to 12 years. Certain leases provide for options to extend up to 10 years and/or options to terminate within six years.

As discussed in Note 1 above, the restructuring reserve liability related to Ciena’s subleased space and vacated space for which subleases are being pursued was $11.1 million as of November 2, 2019. Upon Ciena’s adoption of ASC 842 on November 3, 2019, the existing Accrued liabilities and other short-term obligations and Other long-term obligations were reclassified as a reduction of the Operating ROU assets recorded in accordance with the updated guidance.

Leases included in the Consolidated Balance Sheets were as follows (in thousands):


	Classification	Balance as of October 31, 2020
Operating leases:
Operating ROU Assets	Operating right-of-use assets	$	57,026
Operating lease liabilities	Operating lease liabilities and Long-term operating lease liabilities	80,450
Finance leases:
Buildings, gross	Equipment, building, furniture and fixtures, net	$	70,791
Less: accumulated depreciation	Equipment, building, furniture and fixtures, net	(17,837)
Buildings, net		$	52,954
Finance lease liabilities	Accrued liabilities and other short-term obligations and other long-term obligations	$	64,401

ROU assets that involve subleased or vacant space aggregate $5.0 million as of October 31, 2020. These assets may become impaired if tenants are unable to service their obligations under the sublease, and/or if the estimates as to occupancy are not realized, either of which may be more likely as COVID-19 impacts evolve.

The components of lease expense included in the Consolidated Statement of Operations were as follows (in thousands):


		Year Ended
	Classification	October 31, 2020
Operating lease costs	Operating expense	$	17,544
Finance lease cost:
Amortization of finance ROU asset	Operating expense	4,465
Interest on finance lease liabilities	Interest expense	4,777
Total finance lease cost		9,242
Non-capitalized lease cost	Operating expense	2,976
Variable lease cost(1)	Operating expense	5,185

Net lease cost(2)		$	34,947

(1) Variable lease costs include expenses relating to insurance, taxes, maintenance and other costs required by the applicable operating lease. Variable lease costs are determined by whether they are to be included in base rent and if amounts are based on a consumer price index.

(2) Excludes other operating expense of $11.0 million for the fiscal year ended October 31, 2020 related to amortization of leasehold improvements.

Future minimum lease payments and the present value of minimum lease payments related to operating and finance leases as of October 31, 2020 were as follows (in thousands):


	Operating Leases		Finance Leases		Total
2021	$	20,989	$	7,444	$	28,433
2022	18,689		7,754		26,443
2023	15,415		7,958		23,373
2024	13,118		7,958		21,076
2025	8,838		8,118		16,956
Thereafter	9,365		58,101		67,466
Total lease payments	86,414		97,333		183,747
Less: Imputed interest	(5,964)		(32,932)		(38,896)
Present value of lease liabilities	80,450		64,401		144,851
Less: Current portion of present value of minimum lease payments	(19,035)		(2,836)		(21,871)
Long-term portion of present value of minimum lease payments	$	61,415	$	61,565	$	122,980

As of October 31, 2020, the weighted average remaining lease terms and weighted average discount rates for operating and finance leases were as follows (in thousands):


Weighted-average remaining lease term in years:
Operating leases	4.87
Finance leases	11.71
Weighted-average discount rates:
Operating leases	2.82	%
Finance leases	7.56	%

As of November 2, 2019, minimum aggregate rentals under operating leases were as follows (in thousands):


	2020		2021		2022		2023		2024		Thereafter		Total
Operating leases(1)	$	28,776	$	24,184	$	16,767	$	13,393	$	10,632	$	26,110	$	119,862

(1) The amounts for operating lease commitments above include estimated variable expenses relating to insurance, taxes, maintenance and other costs required by the applicable operating lease.

Leases

LEASES

Leases included in the Consolidated Balance Sheets were as follows (in thousands):


	Classification	Balance as of October 31, 2020
Operating leases:
Operating ROU Assets	Operating right-of-use assets	$	57,026
Operating lease liabilities	Operating lease liabilities and Long-term operating lease liabilities	80,450
Finance leases:
Buildings, gross	Equipment, building, furniture and fixtures, net	$	70,791
Less: accumulated depreciation	Equipment, building, furniture and fixtures, net	(17,837)
Buildings, net		$	52,954
Finance lease liabilities	Accrued liabilities and other short-term obligations and other long-term obligations	$	64,401

The components of lease expense included in the Consolidated Statement of Operations were as follows (in thousands):


		Year Ended
	Classification	October 31, 2020
Operating lease costs	Operating expense	$	17,544
Finance lease cost:
Amortization of finance ROU asset	Operating expense	4,465
Interest on finance lease liabilities	Interest expense	4,777
Total finance lease cost		9,242
Non-capitalized lease cost	Operating expense	2,976
Variable lease cost(1)	Operating expense	5,185

Net lease cost(2)		$	34,947

(2) Excludes other operating expense of $11.0 million for the fiscal year ended October 31, 2020 related to amortization of leasehold improvements.

Future minimum lease payments and the present value of minimum lease payments related to operating and finance leases as of October 31, 2020 were as follows (in thousands):


	Operating Leases		Finance Leases		Total
2021	$	20,989	$	7,444	$	28,433
2022	18,689		7,754		26,443
2023	15,415		7,958		23,373
2024	13,118		7,958		21,076
2025	8,838		8,118		16,956
Thereafter	9,365		58,101		67,466
Total lease payments	86,414		97,333		183,747
Less: Imputed interest	(5,964)		(32,932)		(38,896)
Present value of lease liabilities	80,450		64,401		144,851
Less: Current portion of present value of minimum lease payments	(19,035)		(2,836)		(21,871)
Long-term portion of present value of minimum lease payments	$	61,415	$	61,565	$	122,980

As of October 31, 2020, the weighted average remaining lease terms and weighted average discount rates for operating and finance leases were as follows (in thousands):


Weighted-average remaining lease term in years:
Operating leases	4.87
Finance leases	11.71
Weighted-average discount rates:
Operating leases	2.82	%
Finance leases	7.56	%

As of November 2, 2019, minimum aggregate rentals under operating leases were as follows (in thousands):


	2020		2021		2022		2023		2024		Thereafter		Total
Operating leases(1)	$	28,776	$	24,184	$	16,767	$	13,393	$	10,632	$	26,110	$	119,862

(1) The amounts for operating lease commitments above include estimated variable expenses relating to insurance, taxes, maintenance and other costs required by the applicable operating lease.

Short-Term and Long-Term Debt

12 Months Ended

Oct. 31, 2020

Debt Disclosure [Abstract]

SHORT-TERM AND LONG-TERM DEBT

New 2025 Term Loan

The net carrying values of Ciena’s term loan were comprised of the following for the fiscal periods indicated (in thousands):


	October 31, 2020								November 2, 2019
	Principal Balance		Unamortized Discount		Deferred Debt Issuance Costs		Net Carrying Value		Net Carrying Value
New 2025 Term Loan	$	687,802	$	(1,577)	$	(2,939)	$	683,286	$	—
Old 2025 Term Loan	$	—	$	—	$	—	$	—	$	687,406

Deferred debt issuance costs deducted from the carrying amount of the term loan totaled $2.9 million at October 31, 2020 and $3.6 million at November 2, 2019. Deferred debt issuance costs are amortized using the straight-line method, which approximates the effect of the effective interest rate method, through the maturity of the term loan. The amortization of deferred debt issuance costs for this term loan is included in interest expense, and was $0.6 million during each of fiscal 2020 and fiscal 2019.

As of October 31, 2020, the estimated fair value of the term loan was $686.1 million. Ciena’s term loan is categorized as Level 2 in the fair value hierarchy. Ciena estimated the fair value of its term loan using a market approach based on observable inputs, such as current market transactions involving comparable securities.

On September 28, 2018, Ciena, as borrower, and Ciena Communications, Inc. and Ciena Government Solutions, Inc., as guarantors, entered into an Increase Joinder and Refinancing Amendment to Credit Agreement with the lenders party thereto and the Administrative Agent, pursuant to which Ciena refinanced its term loan maturing on January 30,2022 (the “2022 Term Loan”) into term loan maturing on September 28, 2025 (the “Old 2025 Term Loan”). In connection with the transaction, Ciena received a loan in the amount of $699.1 million, net of original discount, from the Old 2025 Term Loan and simultaneously repaid $394.0 million of outstanding principal under the 2022 Term Loan, resulting in proceeds of $305.1 million. On January 23, 2020, Ciena entered into a Refinancing Amendment to Credit Agreement pursuant to which Ciena refinanced the entire outstanding amount of the Old 2025 Term Loan with an outstanding aggregate principal amount of $693.0 million as of January 23, 2020 and incurred a new senior secured term loan in an aggregate principal amount of $693.0 million and maturing on September 28, 2025 (the “New 2025 Term Loan”). The New 2025 Term Loan requires Ciena to make installment payments of $1.73 million on a quarterly basis. Based on the continuation of existing lenders, this arrangement was primarily accounted for as a modification of debt and, as such, $0.4 million of debt issuance costs associated with the New 2025 Term Loan were expensed. The aggregate balance of $3.4 million of debt issuance costs and approximately $1.9 million of original discount from the Old 2025 Term Loan are included in the carrying value of the New 2025 Term Loan.

The Refinancing Amendment to Credit Agreement amends Ciena’s credit agreement, dated July 15, 2014, as amended (the “Credit Agreement”) and provides that the New 2025 Term Loan will, among other things:

•amortize in equal quarterly installments in aggregate amounts equal to 0.25% of the principal amount of the New 2025 Term Loan as of January 23, 2020, with the balance payable at maturity;

•be subject to mandatory prepayment provisions upon the occurrence of certain specified events substantially similar to the 2022 Term Loan, including certain asset sales, debt issuances and receipt of annual Excess Cash Flow (as defined in the Credit Agreement);

•bear interest, at Ciena’s election, at a per annum rate equal to (a) LIBOR (subject to a floor of 0.00%) plus an applicable margin of 1.75%, or (b) a base rate (subject to a floor of 1.00%) plus an applicable margin of 1.00%; and

•be repayable at any time at Ciena’s election, provided that repayment of the New 2025 Term Loan with proceeds of certain indebtedness prior to July 23, 2020 will require a prepayment premium of 1.00% of the aggregate principal amount of such prepayment.

ABL CREDIT FACILITY

Ciena Corporation and certain of its subsidiaries are parties to the ABL Credit Facility, which provides for a total commitment of $300 million with a maturity date of October 28, 2024. The ABL Credit Facility was entered into on October 28, 2019 and replaced a predecessor senior secured asset-based revolving credit facility. Ciena principally uses the ABL Credit Facility to support the issuance of letters of credit that arise in the ordinary course of its business and thereby to reduce its use of cash required to collateralize these instruments.

As of October 31, 2020, letters of credit totaling $83.0 million were outstanding under the ABL Credit Facility. There were no borrowings outstanding under the ABL Credit Facility as of October 31, 2020.

ABL Credit Facility

12 Months Ended

Oct. 31, 2020

Line of Credit Facility [Abstract]

ABL CREDIT FACILITY

SHORT-TERM AND LONG-TERM DEBT

New 2025 Term Loan

The net carrying values of Ciena’s term loan were comprised of the following for the fiscal periods indicated (in thousands):


	October 31, 2020								November 2, 2019
	Principal Balance		Unamortized Discount		Deferred Debt Issuance Costs		Net Carrying Value		Net Carrying Value
New 2025 Term Loan	$	687,802	$	(1,577)	$	(2,939)	$	683,286	$	—
Old 2025 Term Loan	$	—	$	—	$	—	$	—	$	687,406

•amortize in equal quarterly installments in aggregate amounts equal to 0.25% of the principal amount of the New 2025 Term Loan as of January 23, 2020, with the balance payable at maturity;

ABL CREDIT FACILITY

Earnings (Loss) Per Share Calculation

12 Months Ended

Oct. 31, 2020

Earnings Per Share [Abstract]

EARNINGS (LOSS) PER SHARE CALCULATION

The following tables (in thousands except per share amounts) reconcile Basic EPS and Diluted EPS. Basic EPS is computed using the weighted average number of common shares outstanding. Diluted EPS is computed using the weighted average number of the following, in each case, to the extent the effect is not anti-dilutive: (i) common shares outstanding, (ii) shares issuable upon vesting of stock unit awards; and (iii) shares issuable under Ciena’s employee stock purchase plan and upon exercise of outstanding stock options, using the treasury stock method.

Numerator


	Year Ended
	October 31, 2020		November 2, 2019		November 3, 2018
Net income (loss)	$	361,291	$	253,434	$	(344,690)
Less: Loss on fair value of debt conversion liability	—		—		(12,894)
Net income (loss) used to calculate Diluted EPS	$	361,291	$	253,434	$	(357,584)

Denominator


	Year Ended
	October 31, 2020	November 2, 2019	November 3, 2018
Basic weighted average shares outstanding	154,287	155,720	143,738
Add: Shares underlying outstanding stock options, employee stock purchase plan and restricted stock units	1,668	1,892	—
Diluted weighted average shares outstanding	155,955	157,612	143,738

EPS


	Year Ended
	October 31, 2020		November 2, 2019		November 3, 2018
Basic EPS	$	2.34	$	1.63	$	(2.40)
Diluted EPS	$	2.32	$	1.61	$	(2.49)

The following table summarizes the weighted average shares excluded from the calculation of the denominator for Diluted EPS due to their anti-dilutive effect for the fiscal years indicated (in thousands):


	Year Ended
	October 31, 2020	November 2, 2019	November 3, 2018
Shares underlying stock options and restricted stock units	263	234	2,235
Add: Shares underlying 3.75% Convertible Senior Notes due 2018 (New Notes)	—	—	1,780
3.75% Convertible Senior Notes due October 15, 2018 (Original Notes)	—	—	2,883
4.0% Convertible Senior Notes due December 15, 2020	—	—	9,123
Total shares excluded due to anti-dilutive effect	263	234	16,021

Stockholders' Equity

12 Months Ended

Oct. 31, 2020

Equity [Abstract]

STOCKHOLDERS' EQUITY

STOCKHOLDERS’ EQUITY

Stock Repurchase Program

On December 13, 2018, Ciena announced that its Board of Directors authorized a program to repurchase up to $500 million of Ciena’s common stock. The program may be modified, suspended, or discontinued at any time. Due to the continued uncertainty surrounding the duration and severity of potential macroeconomic impacts of COVID-19, Ciena considered it prudent to temporarily suspend purchases of its common stock under its stock repurchase program effective as of March 17, 2020. The reinstatement of the program and the amount and timing of repurchases are subject to a variety of factors including liquidity, cash flow, stock price, and general business and market conditions.

The following table summarizes activity of the stock repurchase program, reported based on trade date:


	Shares Repurchased	Weighted-Average Price per Share		Amount Repurchased (in thousands)
Cumulative balance at November 3, 2018	—	$	—	$	—
Repurchase of common stock under the stock repurchase program	3,838,466	$	39.10	150,076
Cumulative balance at November 2, 2019	3,838,466	$	39.10	$	150,076
Repurchase of common stock under the stock repurchase program	1,872,446	$	39.81	74,535
Cumulative balance at October 31, 2020	5,710,912	$	39.33	$	224,611

The purchase price for the shares of Ciena’s stock repurchased is reflected as a reduction of common stock and additional paid-in capital.

Stock Repurchases Related to Restricted Stock Unit Tax Withholdings

Ciena repurchases shares of common stock to satisfy employee tax withholding obligations due upon vesting of stock unit awards. The purchase price of $32.5 million for the shares of Ciena’s stock repurchased is reflected as a reduction to stockholders’ equity. Ciena is required to allocate the purchase price of the repurchased shares as a reduction of common stock and additional paid-in capital.

Income Taxes

12 Months Ended

Oct. 31, 2020

Income Tax Disclosure [Abstract]

INCOME TAXES

INCOME TAXESFor the periods indicated, the provision for income taxes consists of the following (in thousands):


	Year Ended
	October 31, 2020		November 2, 2019		November 3, 2018
Provision for income taxes:
Current:
Federal	$	4,363	$	13,143	$	8,327
State	13,328		16,945		8,219
Foreign	12,640		9,816		13,294
Total current	30,331		39,904		29,840
Deferred:
Federal	60,679		31,872		475,951		(1)
State	4,607		(9,159)		(8,202)
Foreign	(947)		(2,861)		(4,118)
Total deferred	64,339		19,852		463,631
Provision for income taxes	$	94,670	$	59,756	$	493,471

(1) The income tax expense for 2018 includes the impact of the remeasurement of the net deferred tax assets and the federal transition tax. See further discussion below.

For the periods indicated, income before provision for income taxes consists of the following (in thousands):


	Year Ended
	October 31, 2020		November 2, 2019		November 3, 2018
United States	$	387,697	$	256,461	$	106,972
Foreign	68,264		56,729		41,809
Total	$	455,961	$	313,190	$	148,781

Ciena’s foreign income tax as a percentage of foreign income may appear disproportionate compared to the expected tax based on the U.S. federal statutory rate and is dependent on the mix of earnings and tax rates in foreign jurisdictions.

For the periods indicated, the tax provision reconciles to the amount computed by multiplying income before income taxes by the U.S. federal statutory rate of 21% for fiscal 2020 and fiscal 2019, and 23.4% for fiscal 2018 (see note below) as follows:


	Year Ended
	October 31, 2020		November 2, 2019		November 3, 2018
Provision at statutory rate	21.00	%	21.00	%	23.41	%
Deferred tax assets remeasurement	—	%	—	%	294.56	%
Base Erosion and Anti-Abuse Tax	(1.02)	%	3.60	%	—	%
State taxes	2.21	%	2.18	%	(0.16)	%
Foreign taxes	0.51	%	(0.37)	%	1.22	%
Research and development credit	(7.74)	%	(7.53)	%	(8.80)	%


Non-deductible compensation	1.79	%	1.01	%	3.39	%
Fair value of debt conversion liability	—	%	—	%	1.90	%
Transition tax	0.02	%	0.29	%	23.23	%
Valuation allowance	3.58	%	(2.13)	%	(11.95)	%
Other	0.41	%	1.03	%	4.88	%
Effective income tax rate	20.76	%	19.08	%	331.68	%

On December 22, 2017, the Tax Act was enacted. The Tax Act significantly revised the U.S. corporate income tax by, among other things, lowering the statutory corporate income tax rate (“federal tax rate”) from 35% to 21% effective January 1, 2018, implementing a modified territorial tax system, and imposing a mandatory one-time transition tax on accumulated earnings of foreign subsidiaries.

As a result of the decrease in the federal tax rate from 35% to 21% effective January 1, 2018, Ciena computed its income tax expense for the November 3, 2018 fiscal year using a blended federal tax rate of 23.41%. Ciena remeasured its DTA using the federal tax rate that will apply when the related temporary differences are expected to reverse.

Our future income tax provisions and deferred tax balances may be affected by the amount of pre-tax income, the jurisdictions where it is earned, the existence and utilizability of tax attributes, changes in tax laws and business reorganizations. Ciena continues to monitor these items and will adopt strategies to address their impact as appropriate.

In December 2017, the SEC issued Staff Accounting Bulletin No. 118, which addresses how a company recognizes provisional amounts when it does not have the necessary information available, prepared or analyzed (including computations) in reasonable detail to complete its accounting for the effect of the changes due to the Tax Act. The measurement period ends when a company has obtained, prepared and analyzed the information necessary to finalize its accounting, but cannot extend beyond one year. The final impact of the Tax Act may differ from the above amounts to the extent they are provisional due to changes in interpretations of the Tax Act, legislative action to address questions that arise because of the Tax Act, changes in accounting standards for income taxes and related interpretations in response to the Tax Act, and any updates or changes to estimates used in the provisional amounts. The enactment of the Tax Act resulted in Ciena recording a provisional tax expense of $472.8 million in fiscal 2018. In the first quarter of fiscal 2019, the measurement period under the Tax Act concluded, which resulted in immaterial adjustments to Ciena’s provisional estimates.

Ciena is also required to make accounting policy elections as a result of the Tax Act. These include whether a valuation allowance is recorded for the estimated effect of the application of GILTI and BEAT or if these will be treated as period costs when incurred. Ciena had made the incremental cash tax cost policy election with respect to analyzing the impact of GILTI on the assessment of the realizability of net operating losses. The realizability of U.S. tax carryforwards is not impacted by the BEAT, and the BEAT is a period cost when incurred. Ciena is also required to elect to either treat taxes due on future GILTI inclusions in U.S. taxable income as a current period expense when incurred or reflect such portion of the future GILTI inclusions in U.S. taxable income that relate to existing basis differences in Ciena’s current measurement of deferred taxes. Ciena’s accounting policy election is to treat the taxes due on future U.S. inclusions in taxable income under GILTI as a period cost when incurred.

The significant components of DTA are as follows (in thousands):


	Year Ended
	October 31, 2020		November 2, 2019
Deferred tax assets:
Reserves and accrued liabilities	$	73,825	$	54,183
Depreciation and amortization	504,233		455,007
NOL and credit carry forward	188,157		302,325
Other	33,017		39,405
Gross deferred tax assets	799,232		850,920
Valuation allowance	(151,427)		(135,978)
Deferred tax asset, net of valuation allowance	$	647,805	$	714,942

A reconciliation of the beginning and ending amount of unrecognized tax benefits, excluding interest and penalties, is as follows (in thousands):


	Amount
Unrecognized tax benefits at October 28, 2017	$	141,582
Decrease related to positions taken in prior period	(46,400)
Increase related to positions taken in current period	2,482
Reductions related to expiration of statute of limitations	(1,301)
Unrecognized tax benefits at November 3, 2018	96,363
Increase related to positions taken in prior period	1,959
Reductions related to settlements with taxing authorities	(1,224)
Reductions related to expiration of statute of limitations	(2,494)
Unrecognized tax benefits at November 2, 2019	94,604
Increase related to positions taken in prior period	653
Increase related to positions taken in current period	1,151
Reductions related to expiration of statute of limitations	(660)
Unrecognized tax benefits at October 31, 2020	$	95,748

As of October 31, 2020 and November 2, 2019, Ciena had accrued $3.9 million and $3.0 million of interest and penalties, respectively, related to unrecognized tax benefits within other long-term liabilities in the Consolidated Balance Sheets. Interest and penalties of $0.9 million and $1.1 million were recorded as an expense to the provision for income taxes during fiscal 2020 and fiscal 2018, respectively. During fiscal 2019, Ciena recorded a provision for interest and penalties in its provision for income taxes of $1.0 million. If recognized, the entire balance of unrecognized tax benefits would impact the effective tax rate. Over the next 12 months, Ciena does not estimate any material changes in unrecognized income tax benefits.

Ciena has not provided for U.S. deferred income taxes on the cumulative unremitted earnings of its non-U.S. affiliates, as it plans to indefinitely reinvest these foreign earnings outside the U.S. As of October 31, 2020, the cumulative amount of such temporary differences for which a deferred tax liability has not been recognized is an estimated $375.0 million. If these earnings were distributed to the U.S., Ciena would be subject to additional foreign withholding taxes of approximately $25.0 million. Additionally, there are no other significant temporary differences for which a deferred tax liability has not been recognized.

As of October 31, 2020, Ciena continues to maintain a valuation allowance against net deferred tax assets of $151.4 million primarily related to state and foreign net operating losses and credits that Ciena estimates it will not be able to use.

The following table summarizes the activity in Ciena’s valuation allowance against its gross deferred tax assets (in thousands):


Year Ended	Beginning Balance		Additions		Deductions		Ending Balance
November 3, 2018	$	185,898	$	23,720	$	66,968	$	142,650
November 2, 2019	$	142,650	$	27,459	$	34,131	$	135,978
October 31, 2020	$	135,978	$	25,749	$	10,300	$	151,427

As of October 31, 2020, Ciena had a $38.2 million income tax credit carry forward which begins to expire in fiscal 2025. Ciena’s ability to use credit carry forwards is subject to limitations pursuant to the ownership change rules of Internal Revenue Code Section 382.

- Definition

The entire disclosure for income taxes. Disclosures may include net deferred tax liability or asset recognized in an enterprise's statement of financial position, net change during the year in the total valuation allowance, approximate tax effect of each type of temporary difference and carryforward that gives rise to a significant portion of deferred tax liabilities and deferred tax assets, utilization of a tax carryback, and tax uncertainties information.

+ References + Details

Share-Based Compensation Expense

12 Months Ended

Oct. 31, 2020

Share-based Payment Arrangement [Abstract]

SHARE-BASED COMPENSATION EXPENSE

SHARE-BASED COMPENSATION EXPENSECiena has outstanding equity awards issued under its 2017 Omnibus Incentive Plan (the “2017 Plan”), its 2008 Omnibus Incentive Plan, and certain legacy equity plans and equity plans assumed as a result of previous acquisitions. All equity awards granted on or after March 23, 2017 are made exclusively from the 2017 Plan. Ciena also makes shares of its common stock available for purchase under its Amended and Restated 2003 Employee Stock Purchase Plan (the “ESPP”). Each of the 2017 Plan and the ESPP are described below.

2017 Plan

The 2017 Plan has a ten-year term and authorizes the issuance of awards including stock options, restricted stock units (RSUs), restricted stock, unrestricted stock, stock appreciation rights (SARs) and other equity and/or cash performance incentive awards to employees, directors and consultants of Ciena. Subject to certain restrictions, the Compensation Committee of the Board of Directors has broad discretion to establish the terms and conditions for awards under the 2017 Plan, including the number of shares, vesting conditions, and the required service or performance criteria. Options and SARs have a maximum term of ten years, and their exercise price may not be less than 100% of fair market value on the date of grant. Repricing of stock options and SARs is prohibited without stockholder approval. Certain change in control transactions may cause awards granted under the 2017 Plan to vest, unless the awards are continued or substituted for in connection with the transaction.

At Ciena’s 2020 Annual Meeting of Stockholders on April 2, 2020, Ciena’s stockholders approved an amendment to the 2017 Plan to increase the number of shares available for issuance thereunder by 12.2 million shares, which became effective as of such date. The 2017 Plan authorizes and reserves 21.1 million shares for issuance. In addition, any shares that remained available for issuance under the 2008 Plan as of March 23, 2017 were added to the 2017 Plan and are available for issuance thereunder. The number of shares available under the 2017 Plan will also be increased from time to time by: (i) the number of shares subject to outstanding awards granted under Ciena’s prior equity compensation plans that are forfeited, expire or are canceled without delivery of common stock following the effective date of the 2017 Plan, and (ii) the number of shares subject to awards assumed or substituted in connection with the acquisition of another company. As of October 31, 2020, the total number of shares authorized for issuance under the 2017 Plan was 21.1 million and approximately 14.7 million shares remained available for issuance thereunder.

Stock Options

There were no stock options granted by Ciena during fiscal 2020, fiscal 2019 or fiscal 2018. Outstanding stock option awards granted to employees in prior periods are generally subject to service-based vesting conditions and vest over a four-year period. The following table is a summary of Ciena’s stock option activity for the periods indicated (shares in thousands):


	Shares Underlying Options Outstanding	Weighted Average Exercise Price




Balance as of November 2, 2019	220	$	35.54
Granted	—	—

Exercised	(105)	$	40.27
Canceled	(8)	$	28.22
Balance as of October 31, 2020	107	$	31.41

The total intrinsic value of options exercised during fiscal 2020, fiscal 2019 and fiscal 2018 was $1.3 million, $0.8 million and $2.2 million, respectively.

The following table summarizes information with respect to stock options outstanding at October 31, 2020, based on Ciena’s closing stock price on the last trading day of Ciena’s fiscal 2020 (shares and intrinsic value in thousands):


					Options Outstanding and Vested at
					October 31, 2020
					Number	Weighted Average Remaining	Weighted
Range of					of	Contractual	Average		Aggregate
Exercise					Underlying	Life	Exercise		Intrinsic
Price					Shares	(Years)	Price		Value
$	11.34	—	$	15.00	37	2.33	$	13.60	$	943
$	17.50	—	$	18.22	9	1.97	$	18.16	203
$	32.06	—	$	37.10	19	2.26	$	35.89	67
$	41.52	—	$	55.63	42	2.63	$	47.87	—




$	11.34	—	$	55.63	107	2.41	$	31.41	$	1,213

Assumptions for Option-Based Awards

Ciena recognizes the fair value of stock options as share-based compensation expense on a straight-line basis over the requisite service period. Ciena did not grant any option-based awards during fiscal 2020, fiscal 2019, or fiscal 2018.

Restricted Stock Units

A restricted stock unit is a stock award that entitles the holder to receive shares of Ciena common stock as the unit vests. Ciena’s outstanding restricted stock unit awards are subject to service-based vesting conditions and/or performance-based vesting conditions. Awards subject to service-based conditions typically vest in increments over a three or four-year period. However, the 2017 Plan permits Ciena to grant service-based stock awards with a minimum one-year vesting period. Awards with performance-based vesting conditions (i) require the achievement of certain operational, financial or other performance criteria or targets or (ii) vest based on Ciena’s total shareholder return as compared to an index of peer companies, in whole or in part.

Assumptions for Restricted Stock Unit Awards

Ciena recognizes the estimated fair value of performance-based awards as share-based compensation expense over the performance period, using graded vesting, which considers each performance period or tranche separately, based on Ciena’s determination of whether it is probable that the performance targets will be achieved. At the end of each reporting period, Ciena reassesses the probability of achieving the performance targets and the performance period required to meet those targets.

Ciena recognizes the estimated fair value of restricted stock units subject only to service-based vesting conditions by multiplying the number of shares underlying the award by the closing price per share of Ciena common stock on the grant date. Ciena recognizes the estimated fair value of restricted stock units subject to performance-based vesting conditions other than total shareholder return by assuming the satisfaction of any performance-based objectives at the “target” level and multiplying the corresponding number of shares earned based upon such achievement by the closing price per share of Ciena common stock on the grant date.

Ciena recognizes the estimated fair value of performance based awards subject to total shareholder return as compared to an index of peer companies using a Monte Carlo simulation valuation model. Assumptions for awards granted during fiscal 2020, fiscal 2019 and fiscal 2018 included the following:


	Year Ended
	October 31, 2020	November 2, 2019	November 3, 2018
Expected volatility of Ciena common stock, which is a weighted average of implied volatility and historical volatility	31.77%	34.10%	34.93%
Historical volatility of Ciena common stock	36.29%	36.80%	38.24%
Historical volatility of S&P Networking Index	18.40%	17.39%	17.14%
Correlation coefficient	0.5891	0.6251	0.6597
Expected life in years	2.87	2.87	2.89
Risk-free interest rate	1.65%	2.62%	1.94%
Expected dividend yield	0.0%	0.0%	0.0%

The following table is a summary of Ciena’s restricted stock unit activity for the period indicated, with the aggregate fair value of the balance outstanding at the end of each period, based on Ciena’s closing stock price on the last trading day of the relevant period (shares and aggregate fair value in thousands):


	Restricted Stock Units Outstanding	Weighted Average Grant Date Fair Value Per Share		Aggregate Fair Value








Balance as of November 2, 2019	4,010	$	27.94	$	146,091
Granted	2,195

Vested	(1,945)
Canceled or forfeited	(211)
Balance as of October 31, 2020	4,049	$	35.08	$	159,498

As of October 31, 2020 and November 2, 2019, 0.4 million and 0.3 million of the total restricted stock units outstanding are performance based awards subject to total shareholder return, respectively. The total fair value of restricted stock units that vested and were converted into common stock during fiscal 2020, fiscal 2019 and fiscal 2018 was $83.5 million, $79.2 million and $54.3 million, respectively. The weighted average fair value of each restricted stock unit granted by Ciena during fiscal 2020, fiscal 2019 and fiscal 2018 was $41.61, $34.53 and $22.46, respectively.

The fair value of each restricted stock unit award is based on the closing price on the date of grant. Share-based expense for service-based restricted stock unit awards is recognized ratably over the vesting period on a straight-line basis.

Share-based expense for performance-based restricted stock unit awards is recognized ratably over the performance period based on Ciena’s determination of whether it is probable that the performance targets will be achieved. At each reporting period, Ciena reassesses the probability of achieving the performance targets and the performance period required to meet those targets. The estimation of whether the performance targets will be achieved involves judgment, and the estimate of expense is revised periodically based on the probability of achieving the performance targets. Revisions are reflected in the period in which the estimate is changed. If any performance goals are not met, no compensation cost is ultimately recognized against that goal and, to the extent previously recognized, compensation expense is reversed.

Share-based compensation expense is recognized only for those awards that are ultimately expected to vest. In the event of a forfeiture of an award, the expense related to the unvested portion of that award is reversed. Reversal of share-based compensation expense based on forfeitures can materially affect the measurement of estimated fair value of Ciena’s share-based compensation.

Amended and Restated ESPP

Under the ESPP, eligible employees may enroll in a twelve-month offer period that begins in December and June of each year. Each offer period includes two six-month purchase periods. Employees may purchase a limited number of shares of Ciena common stock at 85% of the fair market value on either the day immediately preceding the offer date or the purchase date, whichever is lower. The ESPP is considered compensatory for purposes of share-based compensation expense. Pursuant to the ESPP’s “evergreen” provision, on December 31 of each year, the number of shares available under the ESPP increases by up to 0.6 million shares, provided that the total number of shares available at that time shall not exceed 8.2 million. Unless earlier terminated, the ESPP will terminate on January 24, 2023.

During fiscal 2020, fiscal 2019 and fiscal 2018, Ciena issued 0.7 million, 1.0 million and 1.1 million shares under the ESPP, respectively. At October 31, 2020, 4.3 million shares remained available for issuance under the ESPP.

Share-Based Compensation Expense

The following table summarizes share-based compensation expense for the periods indicated (in thousands):


	Year Ended
	October 31, 2020		November 2, 2019		November 3, 2018
Product cost of goods sold	$	3,182	$	2,868	$	2,984
Service cost of goods sold	3,853		3,175		2,616
Share-based compensation expense included in cost of goods sold	7,035		6,043		5,600
Research and development	16,987		14,321		13,518
Sales and marketing	20,194		16,474		14,246
General and administrative	23,424		22,841		19,709

Share-based compensation expense included in operating expense	60,605		53,636		47,473
Share-based compensation expense capitalized in inventory, net	118		57		(101)
Total share-based compensation	$	67,758	$	59,736	$	52,972

As of October 31, 2020, total unrecognized share-based compensation expense was $111.9 million which relates to unvested restricted stock units and is expected to be recognized over a weighted-average period of 1.47 years.

Segment and Entity Wide Disclosures

12 Months Ended

Oct. 31, 2020

Segment Reporting [Abstract]

SEGMENT AND ENTITY WIDE DISCLOSURES

Segment Reporting

Ciena has the following operating segments for reporting purposes: (i) Networking Platforms; (ii) Platform Software and Services; (iii) Blue Planet Automation Software and Services; and (iv) Global Services. During fiscal 2019, Ciena separated its

previous Software and Software-Related Services into two stand-alone operating segments. Because Ciena previously disclosed its Platform Software and Services and Blue Planet Automation Software and Services as distinct product lines in its presentation of segment revenue for Software and Software-Related Services, there is no significant change to Ciena’s presentation of segment revenues as a result of this separation. Comparative periods have been retrospectively adjusted to disclose segment profit for Platform Software and Services and Blue Planet Automation Software and Services. See Note 2 above.

Ciena’s long-lived assets, including equipment, building, furniture and fixtures, Operating ROU assets, finite-lived intangible assets, and maintenance spares, are not reviewed by the chief operating decision maker for purposes of evaluating performance and allocating resources. As of October 31, 2020, equipment, building, furniture and fixtures, net, totaled $272.4 million, and Operating ROU assets totaled $57.0 million both of which support asset groups within Ciena’s four operating segments and unallocated selling and general and administrative activities. As of October 31, 2020, finite-lived intangible assets, goodwill and maintenance spares are assigned to asset groups within the following segments (in thousands):


	October 31, 2020
	Networking Platforms		Platform Software and Services		Blue Planet Automation Software and Services		Global Services		Total

Other intangible assets, net	$	10,977	$	—	$	85,670	$	—	$	96,647
Goodwill	$	65,607	$	156,191	$	89,049	$	—	$	310,847
Maintenance spares, net	$	—	$	—	$	—	$	62,077	$	62,077

Segment Revenue

The table below sets forth Ciena’s segment revenue for the respective periods (in thousands):


	Year Ended
	October 31, 2020		November 2, 2019		November 3, 2018
Revenue:
Networking Platforms
Converged Packet Optical	$	2,547,647	$	2,562,841	$	2,194,519
Packet Networking	267,416		348,477		283,499
Total Networking Platforms	2,815,063		2,911,318		2,478,018

Platform Software and Services	197,809		155,376		173,949

Blue Planet Automation Software and Services	62,632		54,555		26,764

Global Services
Maintenance Support and Training	269,354		261,337		245,161
Installation and Deployment	152,003		148,233		128,829
Consulting and Network Design	35,296		41,312		41,565
Total Global Services	456,653		450,882		415,555

Consolidated revenue	$	3,532,157	$	3,572,131	$	3,094,286

Segment Profit (Loss)

Segment profit (loss) is determined based on internal performance measures used by Ciena’s chief executive officer to assess the performance of each operating segment in a given period. In connection with that assessment, the chief executive officer excludes the following items: selling and marketing costs; general and administrative costs; amortization of intangible assets; significant asset impairments and restructuring costs, acquisition and integration costs; interest and other income (loss), net; interest expense; loss on extinguishment and modification of debt and provision for income taxes.

The table below sets forth Ciena’s segment profit (loss) and the reconciliation to consolidated net income (loss) for the respective periods indicated (in thousands):


	Year Ended
	October 31, 2020		November 2, 2019		November 3, 2018
Segment profit (loss):
Networking Platforms	$	827,105	$	759,244	$	581,113
Platform Software and Services	105,609		64,210		78,048
Blue Planet Automation Software and Services	(12,446)		(17,769)		(8,240)
Global Services	202,735		188,242		172,205
Total segment profit	1,123,003		993,927		823,126
Less: non-performance operating expenses
Selling and marketing	416,425		423,046		394,060
General and administrative	169,548		174,399		160,133
Amortization of intangible assets	23,383		21,808		15,737
Acquisition and integration costs	4,031		3,370		5,111
Significant asset impairments and restructuring costs	22,652		24,538		18,139


Add: other non-performance financial items
Interest and other income (loss), net	964		3,876		(12,029)
Interest expense	(31,321)		(37,452)		(55,249)
Loss on extinguishment and modification of debt	(646)		—		(13,887)
Less: Provision for income taxes	94,670		59,756		493,471
Consolidated net income (loss)	$	361,291	$	253,434	$	(344,690)

Entity Wide Reporting

Ciena’s operating segments each engage in business across three geographic regions: Americas; EMEA; and APAC. Americas include activities in North America and South America (previously, CALA). The following table reflects Ciena’s geographic distribution of revenue principally based on the relevant location for Ciena’s delivery of products and performance of services. For the periods below, Ciena’s geographic distribution of revenue was as follows (in thousands):


	Year Ended
	October 31, 2020		November 2, 2019		November 3, 2018
Americas	$	2,469,278	$	2,503,913	$	2,026,627
EMEA	591,468		566,718		464,876
APAC	471,411		501,500		602,783
Total	$	3,532,157	$	3,572,131	$	3,094,286

North America includes $2.25 billion, $2.25 billion and $1.77 billion of United States revenue for fiscal years ended October 31, 2020, November 2, 2019 and November 3, 2018, respectively. No other country accounted for at least 10% of total revenue for the periods presented above.

The following table reflects Ciena’s geographic distribution of equipment, building, furniture and fixtures, net, and Operating ROU assets, with any country accounting for at least 10% of total equipment, building, furniture and fixtures, net, and Operating ROU assets specifically identified. Equipment, building, furniture and fixtures, net, and Operating ROU assets attributable to geographic regions outside of the United States and Canada are reflected as “Other International.” For the periods below, Ciena’s geographic distribution of equipment, building, furniture and fixtures, net, and Operating ROU assets was as follows (in thousands):


	October 31, 2020		November 2, 2019
Canada	$	214,188	$	211,901
United States	65,321		58,119
Other International	49,894		16,864
Total	$	329,403	$	286,884

While Ciena has benefited from the diversification of its business and customer base, its ten largest customers contributed 54.5% of fiscal 2020 revenue, 59.3% of fiscal 2019 revenue and 56.5% of fiscal 2018 revenue.

For the periods below, customers accounting for at least 10% of Ciena’s revenue were as follows (in thousands):


	October 31, 2020		November 2, 2019		November 3, 2018
AT&T	$	373,163	$	388,704	$	374,576
Verizon	n/a		459,787		318,013
Web-scale provider	n/a		370,577		n/a
Total	$	373,163	$	1,219,068	$	692,589

________________________________


n/a			Denotes revenue representing less than 10% of total revenue for the period

The Web-scale provider noted above contributed greater than 10% of total revenue for the first time in fiscal 2019 and purchased products from each of Ciena’s operating segments excluding Blue Planet Automation Software and Services. The other customers identified above purchased products and services from each of Ciena’s operating segments.

- Definition

The entire disclosure for reporting segments including data and tables. Reportable segments include those that meet any of the following quantitative thresholds a) it's reported revenue, including sales to external customers and intersegment sales or transfers is 10 percent or more of the combined revenue, internal and external, of all operating segments b) the absolute amount of its reported profit or loss is 10 percent or more of the greater, in absolute amount of 1) the combined reported profit of all operating segments that did not report a loss or 2) the combined reported loss of all operating segments that did report a loss c) its assets are 10 percent or more of the combined assets of all operating segments.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 31
-URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8924-108599

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
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-Section 50
-Paragraph 34
-URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8981-108599

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
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-Section 50
-Paragraph 21
-Subparagraph (a)
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Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
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-Paragraph 40
-URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e9031-108599

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 32
-Subparagraph (f)
-URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8933-108599

Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 32
-Subparagraph (e)
-URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8933-108599

Reference 7: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 26
-URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8844-108599

Reference 8: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 41
-URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e9038-108599

Reference 9: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 32
-Subparagraph (d)
-URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8933-108599

Reference 10: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
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-Paragraph 22
-URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8736-108599

Reference 11: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
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-URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e9054-108599

Reference 12: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
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-Paragraph 15
-URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8657-108599

Reference 13: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 21
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8721-108599

Reference 14: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-URI http://asc.fasb.org/topic&trid=2134510

+ Details

Other Employee Benefit Plans	12 Months Ended
Other Employee Benefit Plans	Oct. 31, 2020
Retirement Benefits [Abstract]
OTHER EMPLOYEE BENEFIT PLANS	OTHER EMPLOYEE BENEFIT PLANS Ciena has a Defined Contribution Pension Plan that covers a majority of its Canada-based employees. The plan covers all Canada-based employees who are not part of an excluded group. Total contributions (employee and employer) cannot exceed the lesser of 18% of participant earnings and an annual dollar limit (CAD$27,830 (approximately $20,895) for 2020). This plan includes a required employer contribution of 1% for all participants and an employer matching contribution equal to 50% of the first 6% an employee contributes each pay period. During fiscal 2020, 2019 and 2018, Ciena made matching contributions of approximately CAD$7.0 million (approximately $5.3 million), CAD$5.2 million (approximately $3.9 million) and CAD$5.1 million (approximately $3.8 million), respectively. Ciena has a 401(k) defined contribution profit sharing plan. Participants may contribute up to 60% of base pay through pre-tax or Roth contributions, subject to certain limitations. The plan includes an employer matching contribution equal to 50% of the first 8% an employee contributes each pay period. Ciena may also make discretionary annual profit contributions up to the IRS regulated limit. Ciena has made no profit sharing contributions to date. During fiscal 2020, 2019 and 2018, Ciena made matching contributions of approximately $7.5 million, $5.9 million and $5.8 million, respectively.

Commitments and Contingencies	12 Months Ended
Commitments and Contingencies	Oct. 31, 2020
Commitments and Contingencies Disclosure [Abstract]
COMMITMENTS AND CONTINGENCIES	COMMITMENTS AND CONTINGENCIES Government Grant During fiscal 2018, Ciena entered into agreements related to the Evolution of Networking Services through a Corridor in Quebec and Ontario for Research and Innovation project with the Canadian federal government, the government of the province of Ontario and the government of the province of Quebec to develop a 5G technology corridor between Quebec and Ontario to promote research and development, small business enterprises and entrepreneurs in Canada. Under these agreements, Ciena can receive up to an aggregate CAD$57.6 million (approximately $43.2 million) in reimbursement from the three Canadian government entities for eligible costs over a period commencing on February 20, 2017 and ending on March 31, 2022. Ciena anticipates receiving recurring disbursements over this period. Amounts received under the agreements are subject to recoupment in the event that Ciena fails to achieve certain minimum investment, employment and project milestones. As of October 31, 2020, Ciena has recorded CAD$40.6 million (approximately $30.5 million) in cumulative benefits as a reduction in research and development expense of which CAD$11.7 million (approximately $8.7 million) was recorded in fiscal 2020. As of October 31, 2020, amounts receivable from this grant were CAD$5.1 million (approximately $3.9 million). Tax Contingencies Ciena is subject to various tax liabilities arising in the ordinary course of business. Ciena does not expect that the ultimate settlement of these tax liabilities will have a material effect on its results of operations, financial position or cash flows. Litigation Ciena is subject to various legal proceedings, claims and other matters arising in the ordinary course of business, including those that relate to employment, commercial, tax and other regulatory matters. Ciena is also subject to intellectual property related claims, including claims against third parties that may involve contractual indemnification obligations on the part of Ciena. Ciena does not expect that the ultimate costs to resolve such matters will have a material effect on its results of operations, financial position or cash flows.

Subsequent Events	12 Months Ended
Subsequent Events	Oct. 31, 2020
Subsequent Events [Abstract]
SUBSEQUENT EVENTS	SUBSEQUENT EVENTSShare Repurchase ProgramOn December 10, 2020, Ciena announced that it will resume purchases under its stock repurchase program beginning in the first quarter of fiscal 2021. The amount and timing of repurchases are subject to a variety of factors including liquidity, cash flow, stock price and general business and market conditions. The program may be modified, suspended, or discontinued at any time.

Ciena Corporation and Significant Accounting Policies and Estimates (Policies)

12 Months Ended

Oct. 31, 2020

Accounting Policies [Abstract]

Principles of Consolidation

The accompanying consolidated financial statements include the accounts of Ciena and its wholly owned subsidiaries. All intercompany accounts and transactions have been eliminated in consolidation.

Fiscal Year

Business Combinations

Ciena records acquisitions using the purchase method of accounting. All of the assets acquired, liabilities assumed, contractual contingencies and contingent consideration are recognized at their fair value as of the acquisition date. The excess of the purchase price over the estimated fair values of the net tangible and net intangible assets acquired is recorded as goodwill. The application of the purchase method of accounting for business combinations requires management to make significant estimates and assumptions in the determination of the fair value of assets acquired and liabilities assumed, in order to properly allocate purchase price consideration between assets that are depreciated and amortized from goodwill. These assumptions and estimates include a market participant’s use of the asset and the appropriate discount rates for a market participant. Ciena’s estimates are based on historical experience, information obtained from the management of the acquired companies and, when appropriate, include assistance from independent third-party appraisal firms. Significant assumptions and estimates can include, but are not limited to, the cash flows that an asset is expected to generate in the future, the appropriate weighted-average cost of capital and the cost savings expected to be derived from acquiring an asset. These estimates are inherently uncertain and unpredictable. In addition, unanticipated events and circumstances may occur which may affect the accuracy or validity of such estimates.

Use of Estimates

Cash and Cash Equivalents

Investments

Ciena’s investments in debt securities are classified as available-for-sale and reported at fair value, with unrealized gains and losses recorded in accumulated other comprehensive income (loss). Ciena recognizes losses in the income statement when it determines that declines in the fair value of its investments below their cost basis are other-than-temporary. In determining whether a decline in fair value is other-than-temporary, Ciena considers various factors, including market price (when available), investment ratings, the financial condition and near-term prospects of the investee, the length of time and the extent to which the fair value has been less than Ciena’s cost basis, and Ciena’s intent and ability to hold the investment until maturity or for a period of time sufficient to allow for any anticipated recovery in market value. Ciena considers all marketable debt securities that it expects to convert to cash within one year or less to be short-term investments, with all others considered to be long-term investments.Ciena has minority equity investments in privately held technology companies that are classified in other long-term assets. These investments are carried at cost because Ciena owns less than 20% of the voting equity and does not have the ability to exercise significant influence over the company. Ciena monitors these investments for impairment and makes appropriate reductions to the carrying value when necessary. As of October 31, 2020, the combined carrying value of these investments was $13.4 million. Ciena elects to estimate the fair value at cost minus impairment, if any, plus or minus observable price changes in orderly transactions for identical or similar investments of the same issuer. Ciena evaluates these investments for impairment or observable price changes quarterly and records adjustments to interest and other income (loss), net on the Consolidated Statements of Operations.

Inventories

Inventories are stated at the lower of cost or market, with cost computed using standard cost, which approximates actual cost, on a first-in, first-out basis. Ciena records a provision for excess and obsolete inventory when an impairment has been identified.Ciena writes down its inventory for estimated obsolescence or unmarketable inventory by an amount equal to the difference between the cost of inventory and the estimated net realizable value based on assumptions about future demand, which are affected by changes in Ciena’s strategic direction, discontinuance of a product or introduction of newer versions of products, declines in the sales of or forecasted demand for certain products, and general market conditions.

Segment Reporting

Goodwill

Long-lived Assets

Equipment, Building, Furniture and Fixtures and Internal Use Software

Leases

Intangible Assets

Maintenance Spares

Maintenance spares are recorded at cost. Spares usage cost is expensed ratably over four years.

Concentrations

Revenue Recognition

Ciena determines revenue recognition by applying the following five-step approach:

•identification of the contract, or contracts, with a customer;

•identification of the performance obligations in the contract;

•determination of the transaction price;

•allocation of the transaction price to the performance obligations in the contract; and

•recognition of revenue when, or as, Ciena satisfies a performance obligation.

Significant Judgments

Capitalized Contract Acquisition Costs

Warranty Accruals

Accounts Receivable, Net

Research and Development

Government Grants

Advertising Costs

Ciena expenses all advertising costs as incurred.

Legal Costs

Ciena expenses legal costs associated with litigation as incurred.

Share-Based Compensation Expense

Stock Repurchase Plan

Shares repurchased pursuant to Ciena’s share repurchase program are immediately retired upon purchase. Repurchased common stock is reflected as a reduction of stockholders’ equity. Ciena’s accounting policy related to its share repurchases is to reduce its common stock based on the par value of the shares and to reduce its capital surplus for the excess of the repurchase price over the par value. Since the inception of its share repurchase program in December 2018, Ciena has had an accumulated deficit balance; therefore, the excess over the par value has been applied to additional paid-in capital. Once Ciena has retained earnings, the excess will be charged entirely to retained earnings.Due to the continued uncertainty surrounding the duration and severity of potential macroeconomic impacts of COVID-19, Ciena considered it prudent to temporarily suspend purchases of its common stock under its stock repurchase program effective as of March 17, 2020. See Note 27 below for information related to the resumption of purchases under this plan in fiscal 2021.

Income Taxes

Ciena is required to record excess tax benefits or tax deficiencies related to stock-based compensation as income tax benefit or expense when share-based awards vest or are settled.

The Tax Act also introduced an alternative tax known as the base erosion and anti-abuse tax (“BEAT”). An accounting policy choice has been made to consider BEAT as a period cost when incurred.

Loss Contingencies

Fair Value of Financial Instruments

•Level 1 inputs are unadjusted quoted prices in active markets for identical assets or liabilities;

Restructuring

Foreign Currency

Derivatives

Ciena records derivative instruments in the Consolidated Statements of Cash Flows within operating, investing, or financing activities consistent with the cash flows of the hedged items.

Computation of Net Income (Loss) per Share

Software Development Costs

Newly Issued Accounting Standards

Leases

Opening Balance Adjustments

The following table summarizes the cumulative effect of the changes made to Ciena’s Consolidated Balance Sheet in connection with the adoption of ASC 842 (in thousands):


	Balance at November 2, 2019		New Lease Accounting Standard			Adjusted Balance at November 3, 2019
ASSETS:
Operating right-of-use assets	$	—	$	53,334	(1)	$	53,334

Total assets	$	3,893,346	$	53,334		$	3,946,680

LIABILITIES AND STOCKHOLDERS’ EQUITY:
Accrued liabilities and other short-term obligations	$	382,740	$	(1,484)	(2)	$	381,256
Short-term lease liabilities	$	—	20,498		(3)	$	20,498
Other long-term obligations	$	148,747	(21,244)		(4)	$	127,503
Long-term operating lease liabilities	$	—	55,564		(5)	$	55,564

Total liabilities and stockholders’ equity	$	3,893,346	$	53,334		$	3,946,680

(2) Represents $1.5 million of short-term restructuring reserve liability recognized as a reduction to Operating ROU assets.

(3) Represents $20.5 million of lease liabilities for operating leases.

(4) Represents $9.6 million of long-term restructuring reserve liability, $5.4 million of deferred rent, and $6.2 million of tenant improvement allowances recognized as a reduction to ROU assets.

(5) Represents $55.6 million of lease liabilities for operating leases.

See Note 17 below for additional information.

Fair Value Measurement

Newly Issued Accounting Standards - Not Yet Effective

Ciena Corporation and Significant Accounting Policies and Estimates (Tables)

12 Months Ended

Oct. 31, 2020

Accounting Policies [Abstract]

Schedule of New Accounting Pronouncements and Changes in Accounting Principles

The following table summarizes the cumulative effect of the changes made to Ciena’s Consolidated Balance Sheet in connection with the adoption of ASC 842 (in thousands):


	Balance at November 2, 2019		New Lease Accounting Standard			Adjusted Balance at November 3, 2019
ASSETS:
Operating right-of-use assets	$	—	$	53,334	(1)	$	53,334

Total assets	$	3,893,346	$	53,334		$	3,946,680

LIABILITIES AND STOCKHOLDERS’ EQUITY:
Accrued liabilities and other short-term obligations	$	382,740	$	(1,484)	(2)	$	381,256
Short-term lease liabilities	$	—	20,498		(3)	$	20,498
Other long-term obligations	$	148,747	(21,244)		(4)	$	127,503
Long-term operating lease liabilities	$	—	55,564		(5)	$	55,564

Total liabilities and stockholders’ equity	$	3,893,346	$	53,334		$	3,946,680

(2) Represents $1.5 million of short-term restructuring reserve liability recognized as a reduction to Operating ROU assets.

(3) Represents $20.5 million of lease liabilities for operating leases.

(4) Represents $9.6 million of long-term restructuring reserve liability, $5.4 million of deferred rent, and $6.2 million of tenant improvement allowances recognized as a reduction to ROU assets.

(5) Represents $55.6 million of lease liabilities for operating leases.

Revenue (Tables)

12 Months Ended

Oct. 31, 2020

Revenue from Contract with Customer [Abstract]

Disaggregation of Revenue

The tables below set forth Ciena’s disaggregated revenue for the respective period (in thousands):


	Year Ended October 31, 2020
	Networking Platforms		Platform Software and Services		Blue Planet Automation Software and Services		Global Services		Total
Product lines:
Converged Packet Optical	$	2,547,647	$	—	$	—	$	—	$	2,547,647
Packet Networking	267,416		—		—		—		267,416
Platform Software and Services	—		197,809		—		—		197,809
Blue Planet Automation Software and Services	—		—		62,632		—		62,632
Maintenance Support and Training	—		—		—		269,354		269,354
Installation and Deployment	—		—		—		152,003		152,003
Consulting and Network Design	—		—		—		35,296		35,296
Total revenue by product line	$	2,815,063	$	197,809	$	62,632	$	456,653	$	3,532,157

Timing of revenue recognition:
Products and services at a point in time	$	2,815,063	$	69,099	$	19,583	$	14,363	$	2,918,108
Products and services transferred over time	—		128,710		43,049		442,290		614,049
Total revenue by timing of revenue recognition	$	2,815,063	$	197,809	$	62,632	$	456,653	$	3,532,157


	Year Ended November 2, 2019
	Networking Platforms		Platform Software and Services		Blue Planet Automation Software and Services		Global Services		Total
Product lines:
Converged Packet Optical	$	2,562,841	$	—	$	—	$	—	$	2,562,841
Packet Networking	348,477		—		—		—		348,477
Platform Software and Services	—		155,376		—		—		155,376
Blue Planet Automation Software and Services	—		—		54,555		—		54,555
Maintenance Support and Training	—		—		—		261,337		261,337
Installation and Deployment	—		—		—		148,233		148,233
Consulting and Network Design	—		—		—		41,312		41,312
Total revenue by product line	$	2,911,318	$	155,376	$	54,555	$	450,882	$	3,572,131

Timing of revenue recognition:
Products and services at a point in time	$	2,911,318	$	55,530	$	17,697	$	18,802	$	3,003,347
Products and services transferred over time	—		99,846		36,858		432,080		568,784
Total revenue by timing of revenue recognition	$	2,911,318	$	155,376	$	54,555	$	450,882	$	3,572,131

For the periods below, Ciena’s geographic distribution of revenue was as follows (in thousands):


	Year Ended
	October 31, 2020		November 2, 2019
Geographic Distribution:
Americas	$	2,469,278	$	2,503,913
EMEA	591,468		566,718
APAC	471,411		501,500
Total revenue by geographic distribution	$	3,532,157	$	3,572,131

Contract Balances

The following table provides information about receivables, contract assets and contract liabilities (deferred revenue) from contracts with customers (in thousands):


	Balance at October 31, 2020		Balance at November 2, 2019
Accounts receivable, net	$	719,405	$	724,854
Contract assets for unbilled accounts receivable	$	85,843	$	84,046
Deferred revenue	$	158,363	$	156,873

As of the dates indicated, deferred revenue is comprised of the following (in thousands):


	October 31, 2020		November 2, 2019
Products	$	17,534	$	27,366
Services	140,829		129,507
	158,363		156,873
Less current portion	(108,700)		(111,381)
Long-term deferred revenue	$	49,663	$	45,492

Business Combinations (Tables)

12 Months Ended

Oct. 31, 2020

Business Combinations [Abstract]

Schedule of acquired assets and assumed liabilities

The following table summarizes the final purchase price allocation related to the acquisition based on the estimated fair value of the acquired assets and assumed liabilities (in thousands):


	Amount
Cash and cash equivalents	$	5,718
Accounts receivable	610
Prepaid expenses and other	536
Equipment, furniture and fixtures	17
Goodwill	13,055
Customer relationships and contracts	400
Developed technology	22,200
Accounts payable	(47)
Accrued liabilities	(286)
Deferred revenue	(1,493)
Deferred tax liability	(6,692)
Total purchase consideration	$	34,018

The following table summarizes the final purchase price allocation related to the acquisition based on the estimated fair value of the acquired assets and assumed liabilities (in thousands):


	Amount
Cash and cash equivalents	$	1,025
Accounts receivable	4,790
Prepaid expenses and other long-term assets	372
Goodwill	10,453
Customer relationships and contracts	37,700
Developed technology	9,700


Deferred revenue	(193)
Other current and long-term liabilities	(9,664)
Total purchase price	$	54,183

The following table summarizes the final purchase price allocation related to the acquisition based on the estimated fair value of the acquired assets and assumed liabilities (in thousands):


	Amount
Cash and cash equivalents	$	642
Accounts receivable	1,525
Prepaid expenses and other	450
Equipment, furniture and fixtures	31
Goodwill	20,304
Customer relationships and contracts	2,200
Developed technology	21,900
Accounts payable	(165)
Accrued liabilities	(657)
Deferred revenue	(5,176)
Total purchase price	$	41,054

Schedule of purchase price for acquisition

The following table summarizes the purchase price for the acquisition (in thousands):


	Amount
Cash	$	43,283
Contingent consideration	10,900
Total purchase price	$	54,183

Restructuring Costs (Tables)

12 Months Ended

Oct. 31, 2020

Restructuring and Related Activities [Abstract]

Activity and balance of the restructuring liability accounts

The following table sets forth the restructuring activity and balance of the restructuring liability accounts, which are included in Accrued liabilities and other short-term obligations on Ciena’s Consolidated Balance Sheets, for the fiscal years indicated (in thousands):


	Workforce reduction			Consolidation of excess facilities and other restructuring activities			Total
Balance at October 28, 2017	$	1,291		$	1,648		$	2,939
Charges	14,853		(1)	3,890		(4)	18,743


Cash payments	(14,036)			(3,799)			(17,835)
Balance at November 3, 2018	2,108			1,739			3,847
Charges	13,779		(2)	10,759		(5)	24,538


Cash payments	(11,904)			(1,338)			(13,242)
Balance at November 2, 2019	3,983			11,160			15,143
Charges	7,282		(3)	15,370		(6)	22,652

Adjustments related to ASC 842	—			(11,160)		(7)	(11,160)
Cash payments	(8,350)			(15,370)			(23,720)
Balance at October 31, 2020	$	2,915		$	—		$	2,915
Current restructuring liabilities	$	2,915		$	—		$	2,915
Non-current restructuring liabilities	$	—		$	—		$	—

_________________________________

(1) During fiscal 2018, Ciena recorded a charge of $14.9 million of severance and other employee-related costs associated with a workforce reduction of approximately 240 employees.

(2) During fiscal 2019, Ciena recorded a charge of $13.8 million of severance and other employee-related costs associated with a workforce reduction of approximately 283 employees.

(3) During fiscal 2020, Ciena recorded a charge of $7.3 million of severance and other employee-related costs associated with a workforce reduction of approximately 149 employees.

(4) Reflects unfavorable lease commitments in connection with a portion of facilities located in Petaluma, California and in Gurgaon, India.

(5) Reflects unfavorable lease commitments in connection with a portion of facilities located in Alpharetta, Georgia, Spokane, Washington, Durham, North Carolina and Hanover, Maryland.

(6) Primarily represents costs and imputed interest expense related to restructured facilities and the redesign of certain business processes.

(7) Represents restructuring reserve liability recognized as a reduction to Operating ROU assets, net in relation to adoption of ASC 842. See Notes 1 and 17 for further discussion.

Interest and Other Income (Loss), Net (Tables)

12 Months Ended

Oct. 31, 2020

Other Income and Expenses [Abstract]

Schedule of Interest and Other Income (Loss)

The components of interest and other income (loss), net, were as follows (in thousands):


	Year Ended
	October 31, 2020		November 2, 2019		November 3, 2018
Interest income	$	6,860	$	14,410	$	13,703
Gain on non-hedge designated foreign currency forward contracts	5,551		3		6,791
Foreign currency exchange losses	(13,022)		(9,800)		(19,434)
Loss on fair value of debt conversion liability	—		—		(12,070)
Other	1,575		(737)		(1,019)
Interest and other income (loss), net	$	964	$	3,876	$	(12,029)

Short-Term and Long-Term Investments (Tables)

12 Months Ended

Oct. 31, 2020

Investments, Debt and Equity Securities [Abstract]

Short-term and long-term investments

As of October 31, 2020, investments are comprised of the following (in thousands):


	October 31, 2020
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Estimated Fair Value
U.S. government obligations:

Included in short-term investments	$	150,559	$	109	$	(1)	$	150,667
Included in long-term investments	82,252		—		(26)		82,226
	$	232,811	$	109	$	(27)	$	232,893

As of November 2, 2019, investments are comprised of the following (in thousands):


	November 2, 2019
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Estimated Fair Value
U.S. government obligations:
Included in short-term investments	$	109,715	$	225	$	—	$	109,940
Included in long-term investments	10,017		—		(3)		10,014
	$	119,732	$	225	$	(3)	$	119,954

Legal maturities of debt investments

The following table summarizes the legal maturities of debt investments at October 31, 2020 (in thousands):


	October 31, 2020
	Amortized Cost		Estimated Fair Value
Less than one year	$	150,559	$	150,667
Due in 1-2 years	82,252		82,226
	$	232,811	$	232,893

Fair Value Measurements (Tables)

12 Months Ended

Oct. 31, 2020

Fair Value Disclosures [Abstract]

Summary of the fair value of assets and liabilities recorded on a recurring basis

As of the dates indicated, the following tables summarize the fair value of assets and liabilities that were recorded at fair value on a recurring basis (in thousands):


	October 31, 2020
	Level 1		Level 2		Level 3		Total
Assets:
Money market funds	$	889,293	$	—	$	—	$	889,293
Bond mutual fund	50,361		—		—		50,361
Deferred compensation plan assets	8,213		—		—		8,213
U.S. government obligations	—		232,893		—		232,893

Foreign currency forward contracts	—		82		—		82
Total assets measured at fair value	$	947,867	$	232,975	$	—	$	1,180,842

Liabilities:
Foreign currency forward contracts	$	—	$	681	$	—	$	681
Forward starting interest rate swaps	—		28,513		—		28,513
Total liabilities measured at fair value	$	—	$	29,194	$	—	$	29,194


	November 2, 2019
	Level 1		Level 2		Level 3		Total
Assets:
Money market funds	$	759,114	$	—	$	—	$	759,114
Deferred compensation plan assets	4,974		—		—		4,974
U.S. government obligations	—		119,954		—		119,954

Foreign currency forward contracts	—		1,570		—		1,570
Total assets measured at fair value	$	764,088	$	121,524	$	—	$	885,612

Liabilities:
Foreign currency forward contracts	$	—	$	35	$	—	$	35
Forward starting interest rate swaps	—		21,093		—		21,093
Contingent consideration	—		—		3,705		3,705
Total liabilities measured at fair value	$	—	$	21,128	$	3,705	$	24,833

Assets and liabilities are presented on Ciena's Condensed Consolidated Balance Sheet

As of the dates indicated, the assets and liabilities above were presented on Ciena’s Consolidated Balance Sheet as follows (in thousands):


	October 31, 2020
	Level 1		Level 2		Level 3		Total
Assets:
Cash equivalents	$	939,654	$	—	$	—	$	939,654
Short-term investments	—		150,667		—		150,667
Prepaid expenses and other	—		82		—		82
Other long-term assets	8,213		82,226		—		90,439

Total assets measured at fair value	$	947,867	$	232,975	$	—	$	1,180,842

Liabilities:
Accrued liabilities and other short-term obligations	$	—	$	681	$	—	$	681

Other long-term obligations	—		28,513		—		28,513
Total liabilities measured at fair value	$	—	$	29,194	$	—	$	29,194


	November 2, 2019
	Level 1		Level 2		Level 3		Total
Assets:
Cash equivalents	$	759,114	$	—	$	—	$	759,114
Short-term investments	—		109,940		—		109,940
Prepaid expenses and other	—		1,570		—		1,570
Long-term investments	—		10,014		—		10,014
Other long-term assets	4,974		—		—		4,974
Total assets measured at fair value	$	764,088	$	121,524	$	—	$	885,612

Liabilities:
Accrued liabilities and other short-term obligations	$	—	$	35	$	—	$	35
Other long-term obligations	—		21,093		3,705		24,798
Total liabilities measured at fair value	$	—	$	21,128	$	3,705	$	24,833

Accounts Receivable (Tables)

12 Months Ended

Oct. 31, 2020

Receivables [Abstract]

Activity in allowance for doubtful accounts

The following table summarizes the activity in Ciena’s allowance for doubtful accounts for the fiscal years indicated (in thousands):


Year Ended	Beginning Balance		Provisions		Net Deductions		Ending Balance
November 3, 2018	$	17,580	$	2,700	$	2,902	$	17,378
November 2, 2019	$	17,378	$	6,740	$	4,017	$	20,101
October 31, 2020	$	20,101	$	8,855	$	18,358	$	10,598

Inventories (Tables)

12 Months Ended

Oct. 31, 2020

Inventory Disclosure [Abstract]

Inventories

As of the dates indicated, inventories are comprised of the following (in thousands):


	October 31, 2020		November 2, 2019
Raw materials	$	119,481	$	99,041
Work-in-process	13,738		13,657
Finished goods	210,050		226,622
Deferred cost of goods sold	40,747		53,051
	384,016		392,371
Reserve for excess and obsolescence	(39,637)		(47,322)
	$	344,379	$	345,049

Activity in reserve for excess and obsolete inventory

The following table summarizes the activity in Ciena’s reserve for excess and obsolete inventory for the fiscal years indicated (in thousands):


Year Ended	Beginning Balance		Provisions		Disposals		Ending Balance
November 3, 2018	$	51,206	$	30,615	$	30,883	$	50,938
November 2, 2019	$	50,938	$	28,085	$	31,701	$	47,322
October 31, 2020	$	47,322	$	24,701	$	32,386	$	39,637

Prepaid Expenses and Other (Tables)

12 Months Ended

Oct. 31, 2020

Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]

Prepaid expenses and other

As of the dates indicated, prepaid expenses and other are comprised of the following (in thousands):


	October 31, 2020		November 2, 2019
Contract assets for unbilled accounts receivable	$	85,843	$	84,046
Prepaid VAT and other taxes	72,838		84,706
Prepaid expenses	70,647		48,680
Product demonstration equipment, net	44,793		38,900
Other non-trade receivables	21,981		28,136
Capitalized contract acquisition costs	11,296		11,677
Deferred deployment expense	604		125
Derivative assets	82		1,570
Restricted cash	—		74


	$	308,084	$	297,914

Equipment, Building, Furniture and Fixtures (Tables)

12 Months Ended

Oct. 31, 2020

Property, Plant and Equipment [Abstract]

Equipment, building, furniture and fixtures

As of the dates indicated, equipment, building, furniture and fixtures are comprised of the following (in thousands):


	October 31, 2020		November 2, 2019
Equipment, furniture and fixtures	$	523,231	$	544,012
Building subject to finance lease	70,791		71,760

Leasehold improvements	89,407		94,626
	683,429		710,398
Accumulated depreciation and amortization	(411,052)		(423,514)
	$	272,377	$	286,884

Intangible Assets (Tables)

12 Months Ended

Oct. 31, 2020

Intangible Assets, Net (Excluding Goodwill) [Abstract]

Intangible assets

As of the dates indicated, intangible assets are comprised of the following (in thousands):


	October 31, 2020						November 2, 2019
	Gross Intangible		Accumulated Amortization		Net Intangible		Gross Intangible		Accumulated Amortization		Net Intangible
Developed technology	$	395,726	$	(335,512)	$	60,214	$	373,526	$	(308,261)	$	65,265

Patents and licenses	3,565		(2,529)		1,036		3,565		(2,244)		1,321
Customer relationships, covenants not to compete, outstanding purchase orders and contracts	374,659		(339,262)		35,397		374,381		(328,186)		46,195
Total intangible assets	$	773,950	$	(677,303)	$	96,647	$	751,472	$	(638,691)	$	112,781

Expected future amortization of finite-lived intangible assets

Expected future amortization of intangible assets for the fiscal years indicated is as follows (in thousands):


Fiscal Year	Amount
2021	$	35,452
2022	29,232
2023	14,422
2024	11,371
2025	6,170

	$	96,647

Goodwill (Tables)

12 Months Ended

Oct. 31, 2020

Goodwill and Intangible Assets Disclosure [Abstract]

Goodwill Allocated by Reportable Segments

The following table presents the goodwill allocated to Ciena’s operating segments as of October 31, 2020 and November 2, 2019, as well as the changes to goodwill during fiscal 2020 (in thousands):


	Balance at November 2, 2019		Acquisitions		Impairments		Translation		Balance at October 31, 2020
Platform Software and Services	$	156,191	$	—	$	—	$	—	$	156,191
Blue Planet Automation Software and Services	75,994		13,055		—		—		89,049
Networking Platforms	65,752		—		—		(145)		65,607
Total	$	297,937	$	13,055	$	—	$	(145)	$	310,847

Other Balance Sheet Details (Tables)

12 Months Ended

Oct. 31, 2020

Balance Sheet Related Disclosures [Abstract]

Other long-term assets

As of the dates indicated, other long-term assets are comprised of the following (in thousands):


	October 31, 2020		November 2, 2019
Maintenance spares inventory, net	$	62,077	$	55,482
Cost method equity investments(1)	13,408		10,727
Capitalized contract acquisition costs	4,001		3,994
Deferred debt issuance costs, net(2)	1,596		1,609
Restricted cash	84		42


Other	21,664		17,132
	$	102,830	$	88,986

Accrued liabilities

As of the dates indicated, accrued liabilities and other short-term obligations are comprised of the following (in thousands):


	October 31, 2020		November 2, 2019
Compensation, payroll related tax and benefits	$	135,462	$	182,363
Warranty	49,868		48,498
Vacation	26,945		22,290
Finance lease liability	2,836		2,764
Interest payable	672		1,007
Contingent consideration	—		4,372
Other	118,349		121,446
	$	334,132	$	382,740

Accrued warranty

The following table summarizes the activity in Ciena’s accrued warranty for the fiscal years indicated (in thousands):


Year Ended	Beginning Balance		Current Year Provisions		Settlements		Ending Balance
November 3, 2018	$	42,456	$	20,992	$	18,708	$	44,740
November 2, 2019	$	44,740	$	23,105	$	19,347	$	48,498
October 31, 2020	$	48,498	$	22,417	$	21,047	$	49,868

Deferred revenue

The following table provides information about receivables, contract assets and contract liabilities (deferred revenue) from contracts with customers (in thousands):


	Balance at October 31, 2020		Balance at November 2, 2019
Accounts receivable, net	$	719,405	$	724,854
Contract assets for unbilled accounts receivable	$	85,843	$	84,046
Deferred revenue	$	158,363	$	156,873

As of the dates indicated, deferred revenue is comprised of the following (in thousands):


	October 31, 2020		November 2, 2019
Products	$	17,534	$	27,366
Services	140,829		129,507
	158,363		156,873
Less current portion	(108,700)		(111,381)
Long-term deferred revenue	$	49,663	$	45,492

Other liabilities

As of the dates indicated, other long-term obligations are comprised of the following (in thousands):


	October 31, 2020		November 2, 2019
Finance lease liability	$	61,565	$	65,284
Interest rate swap liability	28,513		21,093
Income tax liability	16,386		20,546
Deferred tenant allowance	—		6,248
Straight-line rent	—		5,434
Contingent consideration	—		3,705
Other	16,721		26,437
	$	123,185	$	148,747

Accumulated Other Comprehensive Income (Tables)

12 Months Ended

Oct. 31, 2020

Statement of Comprehensive Income [Abstract]

Accumulated Other Comprehensive Income

The following table summarizes the changes in accumulated balances of other comprehensive income (“AOCI”), net of tax (in thousands):


	Unrealized Gain/(Loss) on						Cumulative
	Available-for-Sale Securities		Foreign Currency Forward Contracts		Forward Starting Interest Rate Swaps		Foreign Currency Translation Adjustment		Total
Balance at October 28, 2017	$	(451)	$	(1,386)	$	218	$	(9,398)	$	(11,017)
Other comprehensive gain (loss) before reclassifications	26		(3,242)		6,011		686		3,481
Amounts reclassified from AOCI	—		1,568		188		—		1,756
Balance at November 3, 2018	(425)		(3,060)		6,417		(8,712)		(5,780)
Other comprehensive gain (loss) before reclassifications	577		14		(18,948)		(763)		(19,120)
Amounts reclassified from AOCI	—		3,971		(1,155)		—		2,816
Balance at November 2, 2019	152		925		(13,686)		(9,475)		(22,084)
Other comprehensive loss before reclassifications	(107)		(3,891)		(12,302)		(4,174)		(20,474)
Amounts reclassified from AOCI	—		2,747		4,453		—		7,200
Balance at October 31, 2020	$	45	$	(219)	$	(21,535)	$	(13,649)	$	(35,358)

Leases (Tables)

12 Months Ended

Oct. 31, 2020

Leases [Abstract]

Leases Included in the Balance Sheet

Leases included in the Consolidated Balance Sheets were as follows (in thousands):


	Classification	Balance as of October 31, 2020
Operating leases:
Operating ROU Assets	Operating right-of-use assets	$	57,026
Operating lease liabilities	Operating lease liabilities and Long-term operating lease liabilities	80,450
Finance leases:
Buildings, gross	Equipment, building, furniture and fixtures, net	$	70,791
Less: accumulated depreciation	Equipment, building, furniture and fixtures, net	(17,837)
Buildings, net		$	52,954
Finance lease liabilities	Accrued liabilities and other short-term obligations and other long-term obligations	$	64,401

As of October 31, 2020, the weighted average remaining lease terms and weighted average discount rates for operating and finance leases were as follows (in thousands):


Weighted-average remaining lease term in years:
Operating leases	4.87
Finance leases	11.71
Weighted-average discount rates:
Operating leases	2.82	%
Finance leases	7.56	%

Components of Lease Expense

The components of lease expense included in the Consolidated Statement of Operations were as follows (in thousands):


		Year Ended
	Classification	October 31, 2020
Operating lease costs	Operating expense	$	17,544
Finance lease cost:
Amortization of finance ROU asset	Operating expense	4,465
Interest on finance lease liabilities	Interest expense	4,777
Total finance lease cost		9,242
Non-capitalized lease cost	Operating expense	2,976
Variable lease cost(1)	Operating expense	5,185

Net lease cost(2)		$	34,947

(2) Excludes other operating expense of $11.0 million for the fiscal year ended October 31, 2020 related to amortization of leasehold improvements.

Lessee, Operating Lease, Liability, Maturity

Future minimum lease payments and the present value of minimum lease payments related to operating and finance leases as of October 31, 2020 were as follows (in thousands):


	Operating Leases		Finance Leases		Total
2021	$	20,989	$	7,444	$	28,433
2022	18,689		7,754		26,443
2023	15,415		7,958		23,373
2024	13,118		7,958		21,076
2025	8,838		8,118		16,956
Thereafter	9,365		58,101		67,466
Total lease payments	86,414		97,333		183,747
Less: Imputed interest	(5,964)		(32,932)		(38,896)
Present value of lease liabilities	80,450		64,401		144,851
Less: Current portion of present value of minimum lease payments	(19,035)		(2,836)		(21,871)
Long-term portion of present value of minimum lease payments	$	61,415	$	61,565	$	122,980

Finance Lease, Liability, Maturity

Future minimum lease payments and the present value of minimum lease payments related to operating and finance leases as of October 31, 2020 were as follows (in thousands):


	Operating Leases		Finance Leases		Total
2021	$	20,989	$	7,444	$	28,433
2022	18,689		7,754		26,443
2023	15,415		7,958		23,373
2024	13,118		7,958		21,076
2025	8,838		8,118		16,956
Thereafter	9,365		58,101		67,466
Total lease payments	86,414		97,333		183,747
Less: Imputed interest	(5,964)		(32,932)		(38,896)
Present value of lease liabilities	80,450		64,401		144,851
Less: Current portion of present value of minimum lease payments	(19,035)		(2,836)		(21,871)
Long-term portion of present value of minimum lease payments	$	61,415	$	61,565	$	122,980

Future annual minimum lease commitments under non-cancelable operating leases

As of November 2, 2019, minimum aggregate rentals under operating leases were as follows (in thousands):


	2020		2021		2022		2023		2024		Thereafter		Total
Operating leases(1)	$	28,776	$	24,184	$	16,767	$	13,393	$	10,632	$	26,110	$	119,862

(1) The amounts for operating lease commitments above include estimated variable expenses relating to insurance, taxes, maintenance and other costs required by the applicable operating lease.

Short-Term and Long-Term Debt (Tables)

12 Months Ended

Oct. 31, 2020

Debt Disclosure [Abstract]

Schedule of carrying values and estimated fair values of debt instruments

The net carrying values of Ciena’s term loan were comprised of the following for the fiscal periods indicated (in thousands):


	October 31, 2020								November 2, 2019
	Principal Balance		Unamortized Discount		Deferred Debt Issuance Costs		Net Carrying Value		Net Carrying Value
New 2025 Term Loan	$	687,802	$	(1,577)	$	(2,939)	$	683,286	$	—
Old 2025 Term Loan	$	—	$	—	$	—	$	—	$	687,406

Earnings (Loss) Per Share Calculation (Tables)

12 Months Ended

Oct. 31, 2020

Earnings Per Share [Abstract]

Reconciliation of numerator and denominator of Basic and Diluted Earnings Per Share

Numerator


	Year Ended
	October 31, 2020		November 2, 2019		November 3, 2018
Net income (loss)	$	361,291	$	253,434	$	(344,690)
Less: Loss on fair value of debt conversion liability	—		—		(12,894)
Net income (loss) used to calculate Diluted EPS	$	361,291	$	253,434	$	(357,584)

Denominator


	Year Ended
	October 31, 2020	November 2, 2019	November 3, 2018
Basic weighted average shares outstanding	154,287	155,720	143,738
Add: Shares underlying outstanding stock options, employee stock purchase plan and restricted stock units	1,668	1,892	—
Diluted weighted average shares outstanding	155,955	157,612	143,738

EPS


	Year Ended
	October 31, 2020		November 2, 2019		November 3, 2018
Basic EPS	$	2.34	$	1.63	$	(2.40)
Diluted EPS	$	2.32	$	1.61	$	(2.49)

Weighted average shares excluded from calculation of denominator for Basic and Diluted EPS


	Year Ended
	October 31, 2020	November 2, 2019	November 3, 2018
Shares underlying stock options and restricted stock units	263	234	2,235
Add: Shares underlying 3.75% Convertible Senior Notes due 2018 (New Notes)	—	—	1,780
3.75% Convertible Senior Notes due October 15, 2018 (Original Notes)	—	—	2,883
4.0% Convertible Senior Notes due December 15, 2020	—	—	9,123
Total shares excluded due to anti-dilutive effect	263	234	16,021

Stockholders' Equity (Tables)

12 Months Ended

Oct. 31, 2020

Equity [Abstract]

Summary of stock repurchase program

The following table summarizes activity of the stock repurchase program, reported based on trade date:


	Shares Repurchased	Weighted-Average Price per Share		Amount Repurchased (in thousands)
Cumulative balance at November 3, 2018	—	$	—	$	—
Repurchase of common stock under the stock repurchase program	3,838,466	$	39.10	150,076
Cumulative balance at November 2, 2019	3,838,466	$	39.10	$	150,076
Repurchase of common stock under the stock repurchase program	1,872,446	$	39.81	74,535
Cumulative balance at October 31, 2020	5,710,912	$	39.33	$	224,611

Income Taxes (Tables)

12 Months Ended

Oct. 31, 2020

Income Tax Disclosure [Abstract]

Provision (benefit) for income taxes

For the periods indicated, the provision for income taxes consists of the following (in thousands):


	Year Ended
	October 31, 2020		November 2, 2019		November 3, 2018
Provision for income taxes:
Current:
Federal	$	4,363	$	13,143	$	8,327
State	13,328		16,945		8,219
Foreign	12,640		9,816		13,294
Total current	30,331		39,904		29,840
Deferred:
Federal	60,679		31,872		475,951		(1)
State	4,607		(9,159)		(8,202)
Foreign	(947)		(2,861)		(4,118)
Total deferred	64,339		19,852		463,631
Provision for income taxes	$	94,670	$	59,756	$	493,471

(1) The income tax expense for 2018 includes the impact of the remeasurement of the net deferred tax assets and the federal transition tax. See further discussion below.

Income before provision (benefit) for income taxes

For the periods indicated, income before provision for income taxes consists of the following (in thousands):


	Year Ended
	October 31, 2020		November 2, 2019		November 3, 2018
United States	$	387,697	$	256,461	$	106,972
Foreign	68,264		56,729		41,809
Total	$	455,961	$	313,190	$	148,781

Tax provision (benefit) reconciles to the amount computed by multiplying income or loss before income taxes by the U.S. federal statutory rate of 35%


	Year Ended
	October 31, 2020		November 2, 2019		November 3, 2018
Provision at statutory rate	21.00	%	21.00	%	23.41	%
Deferred tax assets remeasurement	—	%	—	%	294.56	%
Base Erosion and Anti-Abuse Tax	(1.02)	%	3.60	%	—	%
State taxes	2.21	%	2.18	%	(0.16)	%
Foreign taxes	0.51	%	(0.37)	%	1.22	%
Research and development credit	(7.74)	%	(7.53)	%	(8.80)	%


Non-deductible compensation	1.79	%	1.01	%	3.39	%
Fair value of debt conversion liability	—	%	—	%	1.90	%
Transition tax	0.02	%	0.29	%	23.23	%
Valuation allowance	3.58	%	(2.13)	%	(11.95)	%
Other	0.41	%	1.03	%	4.88	%
Effective income tax rate	20.76	%	19.08	%	331.68	%

Significant components of deferred tax assets and liabilities

The significant components of DTA are as follows (in thousands):


	Year Ended
	October 31, 2020		November 2, 2019
Deferred tax assets:
Reserves and accrued liabilities	$	73,825	$	54,183
Depreciation and amortization	504,233		455,007
NOL and credit carry forward	188,157		302,325
Other	33,017		39,405
Gross deferred tax assets	799,232		850,920
Valuation allowance	(151,427)		(135,978)
Deferred tax asset, net of valuation allowance	$	647,805	$	714,942

Reconciliation of the beginning and ending amount of unrecognized tax benefits, excluding interest and penalties

A reconciliation of the beginning and ending amount of unrecognized tax benefits, excluding interest and penalties, is as follows (in thousands):


	Amount
Unrecognized tax benefits at October 28, 2017	$	141,582
Decrease related to positions taken in prior period	(46,400)
Increase related to positions taken in current period	2,482
Reductions related to expiration of statute of limitations	(1,301)
Unrecognized tax benefits at November 3, 2018	96,363
Increase related to positions taken in prior period	1,959
Reductions related to settlements with taxing authorities	(1,224)
Reductions related to expiration of statute of limitations	(2,494)
Unrecognized tax benefits at November 2, 2019	94,604
Increase related to positions taken in prior period	653
Increase related to positions taken in current period	1,151
Reductions related to expiration of statute of limitations	(660)
Unrecognized tax benefits at October 31, 2020	$	95,748

Summary of valuation allowance against the gross deferred tax assets

The following table summarizes the activity in Ciena’s valuation allowance against its gross deferred tax assets (in thousands):


Year Ended	Beginning Balance		Additions		Deductions		Ending Balance
November 3, 2018	$	185,898	$	23,720	$	66,968	$	142,650
November 2, 2019	$	142,650	$	27,459	$	34,131	$	135,978
October 31, 2020	$	135,978	$	25,749	$	10,300	$	151,427

Share-Based Compensation Expense (Tables)

12 Months Ended

Oct. 31, 2020

Share-based Payment Arrangement [Abstract]

Summary of stock option activity

The following table is a summary of Ciena’s stock option activity for the periods indicated (shares in thousands):


	Shares Underlying Options Outstanding	Weighted Average Exercise Price




Balance as of November 2, 2019	220	$	35.54
Granted	—	—

Exercised	(105)	$	40.27
Canceled	(8)	$	28.22
Balance as of October 31, 2020	107	$	31.41

Assumptions for awards granted

Assumptions for awards granted during fiscal 2020, fiscal 2019 and fiscal 2018 included the following:


	Year Ended
	October 31, 2020	November 2, 2019	November 3, 2018
Expected volatility of Ciena common stock, which is a weighted average of implied volatility and historical volatility	31.77%	34.10%	34.93%
Historical volatility of Ciena common stock	36.29%	36.80%	38.24%
Historical volatility of S&P Networking Index	18.40%	17.39%	17.14%
Correlation coefficient	0.5891	0.6251	0.6597
Expected life in years	2.87	2.87	2.89
Risk-free interest rate	1.65%	2.62%	1.94%
Expected dividend yield	0.0%	0.0%	0.0%

Summarizes information with respect to stock options outstanding


					Options Outstanding and Vested at
					October 31, 2020
					Number	Weighted Average Remaining	Weighted
Range of					of	Contractual	Average		Aggregate
Exercise					Underlying	Life	Exercise		Intrinsic
Price					Shares	(Years)	Price		Value
$	11.34	—	$	15.00	37	2.33	$	13.60	$	943
$	17.50	—	$	18.22	9	1.97	$	18.16	203
$	32.06	—	$	37.10	19	2.26	$	35.89	67
$	41.52	—	$	55.63	42	2.63	$	47.87	—




$	11.34	—	$	55.63	107	2.41	$	31.41	$	1,213

Summary of restricted stock unit activity


	Restricted Stock Units Outstanding	Weighted Average Grant Date Fair Value Per Share		Aggregate Fair Value








Balance as of November 2, 2019	4,010	$	27.94	$	146,091
Granted	2,195

Vested	(1,945)
Canceled or forfeited	(211)
Balance as of October 31, 2020	4,049	$	35.08	$	159,498

Share-based compensation expense

The following table summarizes share-based compensation expense for the periods indicated (in thousands):


	Year Ended
	October 31, 2020		November 2, 2019		November 3, 2018
Product cost of goods sold	$	3,182	$	2,868	$	2,984
Service cost of goods sold	3,853		3,175		2,616
Share-based compensation expense included in cost of goods sold	7,035		6,043		5,600
Research and development	16,987		14,321		13,518
Sales and marketing	20,194		16,474		14,246
General and administrative	23,424		22,841		19,709

Share-based compensation expense included in operating expense	60,605		53,636		47,473
Share-based compensation expense capitalized in inventory, net	118		57		(101)
Total share-based compensation	$	67,758	$	59,736	$	52,972

Segment and Entity Wide Disclosures (Tables)

12 Months Ended

Oct. 31, 2020

Segment Reporting [Abstract]

Reconciliation of Assets from Segment to Consolidated

As of October 31, 2020, finite-lived intangible assets, goodwill and maintenance spares are assigned to asset groups within the following segments (in thousands):


	October 31, 2020
	Networking Platforms		Platform Software and Services		Blue Planet Automation Software and Services		Global Services		Total

Other intangible assets, net	$	10,977	$	—	$	85,670	$	—	$	96,647
Goodwill	$	65,607	$	156,191	$	89,049	$	—	$	310,847
Maintenance spares, net	$	—	$	—	$	—	$	62,077	$	62,077

Segment revenue

The table below sets forth Ciena’s segment revenue for the respective periods (in thousands):


	Year Ended
	October 31, 2020		November 2, 2019		November 3, 2018
Revenue:
Networking Platforms
Converged Packet Optical	$	2,547,647	$	2,562,841	$	2,194,519
Packet Networking	267,416		348,477		283,499
Total Networking Platforms	2,815,063		2,911,318		2,478,018

Platform Software and Services	197,809		155,376		173,949

Blue Planet Automation Software and Services	62,632		54,555		26,764

Global Services
Maintenance Support and Training	269,354		261,337		245,161
Installation and Deployment	152,003		148,233		128,829
Consulting and Network Design	35,296		41,312		41,565
Total Global Services	456,653		450,882		415,555

Consolidated revenue	$	3,532,157	$	3,572,131	$	3,094,286

Segment profit (loss) and the reconciliation to consolidated net income (loss)

The table below sets forth Ciena’s segment profit (loss) and the reconciliation to consolidated net income (loss) for the respective periods indicated (in thousands):


	Year Ended
	October 31, 2020		November 2, 2019		November 3, 2018
Segment profit (loss):
Networking Platforms	$	827,105	$	759,244	$	581,113
Platform Software and Services	105,609		64,210		78,048
Blue Planet Automation Software and Services	(12,446)		(17,769)		(8,240)
Global Services	202,735		188,242		172,205
Total segment profit	1,123,003		993,927		823,126
Less: non-performance operating expenses
Selling and marketing	416,425		423,046		394,060
General and administrative	169,548		174,399		160,133
Amortization of intangible assets	23,383		21,808		15,737
Acquisition and integration costs	4,031		3,370		5,111
Significant asset impairments and restructuring costs	22,652		24,538		18,139


Add: other non-performance financial items
Interest and other income (loss), net	964		3,876		(12,029)
Interest expense	(31,321)		(37,452)		(55,249)
Loss on extinguishment and modification of debt	(646)		—		(13,887)
Less: Provision for income taxes	94,670		59,756		493,471
Consolidated net income (loss)	$	361,291	$	253,434	$	(344,690)

Ciena's geographic distribution of revenue and long-lived assets

For the periods below, Ciena’s geographic distribution of revenue was as follows (in thousands):


	Year Ended
	October 31, 2020		November 2, 2019		November 3, 2018
Americas	$	2,469,278	$	2,503,913	$	2,026,627
EMEA	591,468		566,718		464,876
APAC	471,411		501,500		602,783
Total	$	3,532,157	$	3,572,131	$	3,094,286

For the periods below, Ciena’s geographic distribution of equipment, building, furniture and fixtures, net, and Operating ROU assets was as follows (in thousands):


	October 31, 2020		November 2, 2019
Canada	$	214,188	$	211,901
United States	65,321		58,119
Other International	49,894		16,864
Total	$	329,403	$	286,884

Schedule of revenue by major customers by reporting segments

For the periods below, customers accounting for at least 10% of Ciena’s revenue were as follows (in thousands):


	October 31, 2020		November 2, 2019		November 3, 2018
AT&T	$	373,163	$	388,704	$	374,576
Verizon	n/a		459,787		318,013
Web-scale provider	n/a		370,577		n/a
Total	$	373,163	$	1,219,068	$	692,589

________________________________


n/a			Denotes revenue representing less than 10% of total revenue for the period

Ciena Corporation and Significant Accounting Policies and Estimates - Narrative (Details) - USD ($) $ in Thousands	12 Months Ended
	Oct. 31, 2020	Nov. 03, 2019	Nov. 02, 2019	Nov. 03, 2018	Nov. 01, 2017	Oct. 31, 2017
Significant Accounting Policies [Line Items]
Equity investments	$ 13,408		$ 10,727
Expected economic lives of finite-lived intangible assets (in years)	7 years
Expected number of years Spares usage cost is expensed	4 years
Cumulative amount of temporary differences for unremitted foreign earnings for which a deferred tax liability has not been recognized	$ 375,000
Stockholder's equity	$ 2,509,597		2,172,761	$ 1,929,334		$ 2,136,342
One-time employee termination benefits related to service period (in days)	60 days
Operating right-of-use assets	$ 57,026	$ 53,334
Operating lease liabilities	80,450	$ 76,000
Restructuring reserve	$ 2,915		15,143	3,847		2,939
Effect of adoption of new accounting standard
Significant Accounting Policies [Line Items]
Stockholder's equity				$ 49,805		62,123
Restructuring reserve			(11,160)
Facility Closing, Vacated Office Space
Significant Accounting Policies [Line Items]
Restructuring reserve			11,100
Minimum
Significant Accounting Policies [Line Items]
Payment terms and cash received	30 days
Maximum
Significant Accounting Policies [Line Items]
Payment terms and cash received	90 days
Foreign exchange contract maturities	24 months
Equipment, furniture and fixtures \| Minimum
Significant Accounting Policies [Line Items]
Estimated useful lives capitalized and amortized straight-line (in years)	2 years
Equipment, furniture and fixtures \| Maximum
Significant Accounting Policies [Line Items]
Estimated useful lives capitalized and amortized straight-line (in years)	5 years
Software and website development \| Minimum
Significant Accounting Policies [Line Items]
Estimated useful lives capitalized and amortized straight-line (in years)	2 years
Software and website development \| Maximum
Significant Accounting Policies [Line Items]
Estimated useful lives capitalized and amortized straight-line (in years)	5 years
3.75% Convertible Senior Notes due October 15, 2018 (New)
Significant Accounting Policies [Line Items]
Interest rate on convertible notes	3.75%			0.0375%
Retained Earnings
Significant Accounting Policies [Line Items]
Stockholder's equity	$ (4,283,122)		$ (4,644,413)	$ (4,947,652)		(4,664,253)
Retained Earnings \| Effect of adoption of new accounting standard
Significant Accounting Policies [Line Items]
Stockholder's equity				$ 49,805		$ 61,291
Retained Earnings \| Accounting Standards Update 2016-09 \| Effect of adoption of new accounting standard
Significant Accounting Policies [Line Items]
Stockholder's equity					$ 62,100

Ciena Corporation and Significant Accounting Policies and Estimates - Opening Balance Adjustments (Details) - USD ($) $ in Thousands	Oct. 31, 2020	Nov. 03, 2019	Nov. 02, 2019
ASSETS
Operating right-of-use assets	$ 57,026	$ 53,334
Total assets	4,180,917	3,946,680	$ 3,893,346
LIABILITIES AND STOCKHOLDERS’ EQUITY (DEFICIT)
Accrued liabilities and other short-term obligations	334,132	381,256	382,740
Operating lease liabilities	19,035	20,498
Other long-term obligations	123,185	127,503	148,747
Long-term operating lease liabilities	61,415	55,564
Total liabilities and stockholders’ equity	4,180,917	3,946,680	3,893,346
Straight-line rent			$ 5,434
Short-term restructuring reserve liability	2,915
Long-term restructuring reserve liability	$ 0
Accounting Standards Update 2016-02
ASSETS
Operating right-of-use assets		53,334
Total assets		53,334
LIABILITIES AND STOCKHOLDERS’ EQUITY (DEFICIT)
Accrued liabilities and other short-term obligations		(1,484)
Operating lease liabilities		20,498
Other long-term obligations		(21,244)
Long-term operating lease liabilities		55,564
Total liabilities and stockholders’ equity		53,334
Operating right-of-use assets before adjustments		76,000
Straight-line rent		(5,400)
Tenant improvement allowances		(6,200)
Short-term restructuring reserve liability		(1,500)
Long-term restructuring reserve liability		$ (9,600)

Revenue - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	12 Months Ended
	Oct. 31, 2020	Nov. 02, 2019	Nov. 03, 2018
Disaggregation of Revenue [Line Items]
Total revenue	$ 3,532,157	$ 3,572,131	$ 3,094,286
Products and services at a point in time
Disaggregation of Revenue [Line Items]
Total revenue	2,918,108	3,003,347
Products and services transferred over time
Disaggregation of Revenue [Line Items]
Total revenue	614,049	568,784
Converged Packet Optical
Disaggregation of Revenue [Line Items]
Total revenue	2,547,647	2,562,841
Packet Networking
Disaggregation of Revenue [Line Items]
Total revenue	267,416	348,477
Platform Software and Services
Disaggregation of Revenue [Line Items]
Total revenue	197,809	155,376
Blue Planet Automation Software and Services
Disaggregation of Revenue [Line Items]
Total revenue	62,632	54,555
Maintenance Support and Training
Disaggregation of Revenue [Line Items]
Total revenue	269,354	261,337
Installation and Deployment
Disaggregation of Revenue [Line Items]
Total revenue	152,003	148,233
Consulting and Network Design
Disaggregation of Revenue [Line Items]
Total revenue	35,296	41,312
Operating Segments
Disaggregation of Revenue [Line Items]
Total revenue	3,532,157	3,572,131	3,094,286
Networking Platforms \| Operating Segments
Disaggregation of Revenue [Line Items]
Total revenue	2,815,063	2,911,318	2,478,018
Networking Platforms \| Operating Segments \| Products and services at a point in time
Disaggregation of Revenue [Line Items]
Total revenue	2,815,063	2,911,318
Networking Platforms \| Operating Segments \| Products and services transferred over time
Disaggregation of Revenue [Line Items]
Total revenue	0	0
Networking Platforms \| Operating Segments \| Converged Packet Optical
Disaggregation of Revenue [Line Items]
Total revenue	2,547,647	2,562,841	2,194,519
Networking Platforms \| Operating Segments \| Packet Networking
Disaggregation of Revenue [Line Items]
Total revenue	267,416	348,477	283,499
Networking Platforms \| Operating Segments \| Platform Software and Services
Disaggregation of Revenue [Line Items]
Total revenue	0	0
Networking Platforms \| Operating Segments \| Blue Planet Automation Software and Services
Disaggregation of Revenue [Line Items]
Total revenue	0	0
Networking Platforms \| Operating Segments \| Maintenance Support and Training
Disaggregation of Revenue [Line Items]
Total revenue	0	0
Networking Platforms \| Operating Segments \| Installation and Deployment
Disaggregation of Revenue [Line Items]
Total revenue	0	0
Networking Platforms \| Operating Segments \| Consulting and Network Design
Disaggregation of Revenue [Line Items]
Total revenue	0	0
Platform Software and Services \| Operating Segments
Disaggregation of Revenue [Line Items]
Total revenue	197,809	155,376
Platform Software and Services \| Operating Segments \| Products and services at a point in time
Disaggregation of Revenue [Line Items]
Total revenue	69,099	55,530
Platform Software and Services \| Operating Segments \| Products and services transferred over time
Disaggregation of Revenue [Line Items]
Total revenue	128,710	99,846
Platform Software and Services \| Operating Segments \| Converged Packet Optical
Disaggregation of Revenue [Line Items]
Total revenue	0	0
Platform Software and Services \| Operating Segments \| Packet Networking
Disaggregation of Revenue [Line Items]
Total revenue	0	0
Platform Software and Services \| Operating Segments \| Platform Software and Services
Disaggregation of Revenue [Line Items]
Total revenue	197,809	155,376	173,949
Platform Software and Services \| Operating Segments \| Blue Planet Automation Software and Services
Disaggregation of Revenue [Line Items]
Total revenue	0	0
Platform Software and Services \| Operating Segments \| Maintenance Support and Training
Disaggregation of Revenue [Line Items]
Total revenue	0	0
Platform Software and Services \| Operating Segments \| Installation and Deployment
Disaggregation of Revenue [Line Items]
Total revenue	0	0
Platform Software and Services \| Operating Segments \| Consulting and Network Design
Disaggregation of Revenue [Line Items]
Total revenue	0	0
Blue Planet Automation Software and Services \| Operating Segments
Disaggregation of Revenue [Line Items]
Total revenue	62,632	54,555
Blue Planet Automation Software and Services \| Operating Segments \| Products and services at a point in time
Disaggregation of Revenue [Line Items]
Total revenue	19,583	17,697
Blue Planet Automation Software and Services \| Operating Segments \| Products and services transferred over time
Disaggregation of Revenue [Line Items]
Total revenue	43,049	36,858
Blue Planet Automation Software and Services \| Operating Segments \| Converged Packet Optical
Disaggregation of Revenue [Line Items]
Total revenue	0	0
Blue Planet Automation Software and Services \| Operating Segments \| Packet Networking
Disaggregation of Revenue [Line Items]
Total revenue	0	0
Blue Planet Automation Software and Services \| Operating Segments \| Platform Software and Services
Disaggregation of Revenue [Line Items]
Total revenue	0	0
Blue Planet Automation Software and Services \| Operating Segments \| Blue Planet Automation Software and Services
Disaggregation of Revenue [Line Items]
Total revenue	62,632	54,555	26,764
Blue Planet Automation Software and Services \| Operating Segments \| Maintenance Support and Training
Disaggregation of Revenue [Line Items]
Total revenue	0	0
Blue Planet Automation Software and Services \| Operating Segments \| Installation and Deployment
Disaggregation of Revenue [Line Items]
Total revenue	0	0
Blue Planet Automation Software and Services \| Operating Segments \| Consulting and Network Design
Disaggregation of Revenue [Line Items]
Total revenue	0	0
Global Services \| Operating Segments
Disaggregation of Revenue [Line Items]
Total revenue	456,653	450,882	415,555
Global Services \| Operating Segments \| Products and services at a point in time
Disaggregation of Revenue [Line Items]
Total revenue	14,363	18,802
Global Services \| Operating Segments \| Products and services transferred over time
Disaggregation of Revenue [Line Items]
Total revenue	442,290	432,080
Global Services \| Operating Segments \| Converged Packet Optical
Disaggregation of Revenue [Line Items]
Total revenue	0	0
Global Services \| Operating Segments \| Packet Networking
Disaggregation of Revenue [Line Items]
Total revenue	0	0
Global Services \| Operating Segments \| Platform Software and Services
Disaggregation of Revenue [Line Items]
Total revenue	0	0
Global Services \| Operating Segments \| Blue Planet Automation Software and Services
Disaggregation of Revenue [Line Items]
Total revenue	0	0
Global Services \| Operating Segments \| Maintenance Support and Training
Disaggregation of Revenue [Line Items]
Total revenue	269,354	261,337	245,161
Global Services \| Operating Segments \| Installation and Deployment
Disaggregation of Revenue [Line Items]
Total revenue	152,003	148,233	128,829
Global Services \| Operating Segments \| Consulting and Network Design
Disaggregation of Revenue [Line Items]
Total revenue	$ 35,296	$ 41,312	$ 41,565

Revenue Revenue - Geographical Distribution of Revenue (Details) - USD ($) $ in Thousands	12 Months Ended
	Oct. 31, 2020	Nov. 02, 2019	Nov. 03, 2018
Disaggregation of Revenue [Line Items]
Total revenue	$ 3,532,157	$ 3,572,131	$ 3,094,286
Americas
Disaggregation of Revenue [Line Items]
Total revenue	2,469,278	2,503,913	2,026,627
EMEA
Disaggregation of Revenue [Line Items]
Total revenue	591,468	566,718	464,876
APAC
Disaggregation of Revenue [Line Items]
Total revenue	$ 471,411	$ 501,500	$ 602,783

- Definition

Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 22
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8736-108599

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 323
-SubTopic 10
-Section 50
-Paragraph 3
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=114001798&loc=d3e33918-111571

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 28
-Subparagraph (f)
-URI http://asc.fasb.org/extlink&oid=75031198&loc=d3e14064-108612

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 32
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8933-108599

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 32
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8933-108599

Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 22
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8736-108599

Reference 7: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 40
-URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e9031-108599

Reference 8: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
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-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8906-108599

Reference 9: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 41
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e9038-108599

Reference 10: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 42
-URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e9054-108599

Reference 11: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
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-Section S99
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-Subparagraph (SX 210.4-08(g)(1)(ii))
-URI http://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690

Reference 12: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 235
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-05(b)(2))
-URI http://asc.fasb.org/extlink&oid=120399901&loc=d3e537907-122884

Reference 13: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03(1))
-URI http://asc.fasb.org/extlink&oid=120395209&loc=SL114868664-224227

+ Details

Revenue - Contract Balances (Details) - USD ($) $ in Thousands	Oct. 31, 2020	Nov. 02, 2019
Revenue from Contract with Customer [Abstract]
Accounts receivable, net	$ 719,405	$ 724,854
Contract assets for unbilled accounts receivable	85,843	84,046
Deferred revenue	$ 158,363	$ 156,873

Revenue - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
Revenue - Narrative (Details) - USD ($) $ in Millions	Oct. 31, 2020	Nov. 02, 2019
Revenue from Contract with Customer [Abstract]
Revenue recognized that was previously deferred	$ 101.9	$ 95.1
Capitalized contract acquisition costs	15.3	15.7
Amortization of capitalized contract acquisition costs	22.4	$ 18.6
Remaining performance obligation	$ 1,000.0

Revenue - Performance Obligation (Details) - Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2019-11-01	Oct. 31, 2020
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Percentage of remaining performance obligation	81.00%
Period of remaining performance obligation	12 months

Business Combinations (Details) - USD ($)				12 Months Ended			13 Months Ended
Business Combinations (Details) - USD ($)	Nov. 02, 2019	Oct. 01, 2018	Jul. 02, 2018	Oct. 31, 2020	Nov. 02, 2019	Nov. 03, 2018	Oct. 31, 2019
Business Acquisition [Line Items]
Acquisition-related costs				$ 4,031,000	$ 3,370,000	$ 5,111,000
Contingent consideration agreement term					3 years
Contingent consideration	$ 4,372,000			0	$ 4,372,000
Centina Systems, Inc.
Business Acquisition [Line Items]
Payment to acquire business	$ 34,000,000.0
Acquisition-related costs				800,000
Centina Systems, Inc. \| Customer relationships and contracts
Business Acquisition [Line Items]
Intangible assets, useful life	2 years
Centina Systems, Inc. \| Developed technology
Business Acquisition [Line Items]
Intangible assets, useful life	5 years
DonRiver
Business Acquisition [Line Items]
Payment to acquire business		$ 43,283,000
Acquisition-related costs				6,900,000	7,500,000	3,500,000
Undiscounted contingent consideration, maximum		$ 28,500,000
Contingent consideration agreement term		3 years
Contingent consideration revenue measurement term		25 months
Change in contingent consideration				(3,700,000)			$ (2,800,000)
Contingent consideration	$ 8,100,000	$ 10,900,000		0	8,100,000
Contingent consideration paid				4,400,000
DonRiver \| Customer relationships and contracts
Business Acquisition [Line Items]
Intangible assets, useful life		7 years
DonRiver \| Developed technology
Business Acquisition [Line Items]
Intangible assets, useful life		7 years
Packet Design
Business Acquisition [Line Items]
Payment to acquire business			$ 41,100,000
Acquisition-related costs						1,600,000
Packet Design \| Customer relationships and contracts
Business Acquisition [Line Items]
Intangible assets, useful life			3 years
Packet Design \| Developed technology
Business Acquisition [Line Items]
Intangible assets, useful life			5 years
Contingent Consideration \| DonRiver
Business Acquisition [Line Items]
Undiscounted contingent consideration, maximum		$ 15,000,000.0
Undiscounted contingent consideration, minimum		0.0
Contingent Compensation \| DonRiver
Business Acquisition [Line Items]
Undiscounted contingent consideration, maximum		13,500,000
Undiscounted contingent consideration, minimum		$ 0.0
Change in contingent consideration				$ 6,900,000	$ 5,100,000	$ 400,000

Business Combinations - Purchase Price Allocation (Details) - USD ($) $ in Thousands	Oct. 31, 2020	Nov. 02, 2019	Oct. 01, 2018	Jul. 02, 2018
Business Acquisition [Line Items]
Goodwill	$ 310,847	$ 297,937
DonRiver
Business Acquisition [Line Items]
Cash and cash equivalents			$ 1,025
Accounts receivable			4,790
Prepaid expenses and other long-term assets			372
Goodwill			10,453
Deferred revenue			(193)
Other current and long-term liabilities			(9,664)
Total purchase price			54,183
DonRiver \| Customer relationships and contracts
Business Acquisition [Line Items]
Intangible assets acquired			37,700
DonRiver \| Developed technology
Business Acquisition [Line Items]
Intangible assets acquired			$ 9,700
Packet Design
Business Acquisition [Line Items]
Cash and cash equivalents				$ 642
Accounts receivable				1,525
Prepaid expenses and other long-term assets				450
Equipment, furniture and fixtures				31
Goodwill				20,304
Accounts payable				(165)
Accrued liabilities				(657)
Deferred revenue				(5,176)
Total purchase price				41,054
Packet Design \| Customer relationships and contracts
Business Acquisition [Line Items]
Intangible assets acquired				2,200
Packet Design \| Developed technology
Business Acquisition [Line Items]
Intangible assets acquired				$ 21,900
Centina Systems, Inc.
Business Acquisition [Line Items]
Cash and cash equivalents		5,718
Accounts receivable		610
Prepaid expenses and other long-term assets		536
Equipment, furniture and fixtures		17
Goodwill		13,055
Accounts payable		(47)
Accrued liabilities		(286)
Deferred revenue		(1,493)
Deferred tax liability		(6,692)
Total purchase price		34,018
Centina Systems, Inc. \| Customer relationships and contracts
Business Acquisition [Line Items]
Intangible assets acquired		400
Centina Systems, Inc. \| Developed technology
Business Acquisition [Line Items]
Intangible assets acquired		$ 22,200

Business Combinations - Consideration Transferred (Details) - DonRiver $ in Thousands	Oct. 01, 2018 USD ($)
Business Acquisition [Line Items]
Cash	$ 43,283
Contingent consideration	10,900
Total purchase price	$ 54,183

Restructuring Costs (Details) $ in Thousands	12 Months Ended
Restructuring Costs (Details) $ in Thousands	Oct. 31, 2020 USD ($) employee	Nov. 02, 2019 USD ($) employee	Nov. 03, 2018 USD ($) employee
Activity and balance of the restructuring liability accounts
Balance at beginning of period	$ 15,143	$ 3,847	$ 2,939
Charges	22,652	24,538	18,743
Cash payments	(23,720)	(13,242)	(17,835)
Balance at end of period	2,915	15,143	3,847
Current restructuring liabilities	2,915
Non-current restructuring liabilities	0
Effect of adoption of new accounting standard
Activity and balance of the restructuring liability accounts
Balance at beginning of period	(11,160)
Balance at end of period		(11,160)
Workforce reduction
Activity and balance of the restructuring liability accounts
Balance at beginning of period	3,983	2,108	1,291
Charges	7,282	13,779	14,853
Cash payments	(8,350)	(11,904)	(14,036)
Balance at end of period	2,915	$ 3,983	$ 2,108
Current restructuring liabilities	2,915
Non-current restructuring liabilities	$ 0
Restructuring and Related Cost, Positions Eliminated [Abstract]
Number of employees in workforce reduction \| employee	149	283	240
Workforce reduction \| Effect of adoption of new accounting standard
Activity and balance of the restructuring liability accounts
Balance at beginning of period	$ 0
Balance at end of period		$ 0
Consolidation of excess facilities and other restructuring activities
Activity and balance of the restructuring liability accounts
Balance at beginning of period	11,160	1,739	$ 1,648
Charges	15,370	10,759	3,890
Cash payments	(15,370)	(1,338)	(3,799)
Balance at end of period	0	11,160	$ 1,739
Current restructuring liabilities	0
Non-current restructuring liabilities	0
Consolidation of excess facilities and other restructuring activities \| Effect of adoption of new accounting standard
Activity and balance of the restructuring liability accounts
Balance at beginning of period	$ (11,160)
Balance at end of period		$ (11,160)

Interest and Other Income (Loss), Net (Details) - USD ($) $ in Thousands	12 Months Ended
	Oct. 31, 2020	Nov. 02, 2019	Nov. 03, 2018
Other Income and Expenses [Abstract]
Interest income	$ 6,860	$ 14,410	$ 13,703
Gain on non-hedge designated foreign currency forward contracts	5,551	3	6,791
Foreign currency exchange losses	(13,022)	(9,800)	(19,434)
Loss on fair value of debt conversion liability	0	0	(12,070)
Other	1,575	(737)	(1,019)
Interest and other income (loss), net	$ 964	$ 3,876	$ (12,029)

Short-Term and Long-Term Investments (Details) - USD ($) $ in Thousands	Oct. 31, 2020	Nov. 02, 2019
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	$ 232,811
Estimated Fair Value	232,893
U.S. government obligations
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	232,811	$ 119,732
Gross Unrealized Gains	109	225
Gross Unrealized Losses	(27)	(3)
Estimated Fair Value	232,893	119,954
Short-term Investments \| U.S. government obligations
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	150,559	109,715
Gross Unrealized Gains	109	225
Gross Unrealized Losses	(1)	0
Estimated Fair Value	150,667	109,940
Other Long-term Investments \| U.S. government obligations
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	82,252	10,017
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(26)	(3)
Estimated Fair Value	$ 82,226	$ 10,014

Short-Term and Long-Term Investments - Legal Maturities of Debt Investments (Details) $ in Thousands	Oct. 31, 2020 USD ($)
Investments, Debt and Equity Securities [Abstract]
Amortized Cost, Less than one year	$ 150,559
Amortized Cost, Due in 1-2 years	82,252
Amortized Cost	232,811
Estimated Fair Value, Less than one year	150,667
Estimated Fair Value, Due in 1-2 years	82,226
Estimated Fair Value	$ 232,893

Fair Value Measurements (Details) - USD ($)	Oct. 31, 2020	Nov. 02, 2019
Assets:
Debt securities	$ 232,893,000
Liabilities:
Contingent consideration	0	$ 4,372,000
Fair Value, Measurements, Recurring
Assets:
Money market funds	889,293,000	759,114,000
Deferred compensation plan assets	8,213,000	4,974,000
Total assets measured at fair value	1,180,842,000	885,612,000
Liabilities:
Contingent consideration		3,705,000
Total liabilities measured at fair value	29,194,000	24,833,000
Fair Value, Measurements, Recurring \| Bond mutual fund
Assets:
Debt securities	50,361,000
Fair Value, Measurements, Recurring \| U.S. government obligations
Assets:
Debt securities	232,893,000	119,954,000
Level 1 \| Fair Value, Measurements, Recurring
Assets:
Money market funds	889,293,000	759,114,000
Deferred compensation plan assets	8,213,000	4,974,000
Total assets measured at fair value	947,867,000	764,088,000
Liabilities:
Contingent consideration		0
Total liabilities measured at fair value	0	0
Level 1 \| Fair Value, Measurements, Recurring \| Bond mutual fund
Assets:
Debt securities	50,361,000
Level 1 \| Fair Value, Measurements, Recurring \| U.S. government obligations
Assets:
Debt securities	0	0
Level 2 \| Fair Value, Measurements, Recurring
Assets:
Money market funds	0	0
Deferred compensation plan assets	0	0
Total assets measured at fair value	232,975,000	121,524,000
Liabilities:
Contingent consideration		0
Total liabilities measured at fair value	29,194,000	21,128,000
Level 2 \| Fair Value, Measurements, Recurring \| Bond mutual fund
Assets:
Debt securities	0
Level 2 \| Fair Value, Measurements, Recurring \| U.S. government obligations
Assets:
Debt securities	232,893,000	119,954,000
Level 3 \| Fair Value, Measurements, Recurring
Assets:
Money market funds	0	0
Deferred compensation plan assets	0	0
Total assets measured at fair value	0	0
Liabilities:
Contingent consideration		3,705,000
Total liabilities measured at fair value	0	3,705,000
Level 3 \| Fair Value, Measurements, Recurring \| Bond mutual fund
Assets:
Debt securities	0
Level 3 \| Fair Value, Measurements, Recurring \| U.S. government obligations
Assets:
Debt securities	0	0
Foreign currency forward contracts \| Fair Value, Measurements, Recurring
Assets:
Foreign currency forward contracts	82,000	1,570,000
Liabilities:
Derivative liability	681,000	35,000
Foreign currency forward contracts \| Level 1 \| Fair Value, Measurements, Recurring
Assets:
Foreign currency forward contracts	0	0
Liabilities:
Derivative liability	0	0
Foreign currency forward contracts \| Level 2 \| Fair Value, Measurements, Recurring
Assets:
Foreign currency forward contracts	82,000	1,570,000
Liabilities:
Derivative liability	681,000	35,000
Foreign currency forward contracts \| Level 3 \| Fair Value, Measurements, Recurring
Assets:
Foreign currency forward contracts	0	0
Liabilities:
Derivative liability	0	0
Forward starting interest rate swaps \| Fair Value, Measurements, Recurring
Liabilities:
Derivative liability	28,513,000	21,093,000
Forward starting interest rate swaps \| Level 1 \| Fair Value, Measurements, Recurring
Liabilities:
Derivative liability	0	0
Forward starting interest rate swaps \| Level 2 \| Fair Value, Measurements, Recurring
Liabilities:
Derivative liability	28,513,000	21,093,000
Forward starting interest rate swaps \| Level 3 \| Fair Value, Measurements, Recurring
Liabilities:
Derivative liability	$ 0	$ 0

Fair Value Measurements - Balance Sheet Items (Details) - USD ($)	12 Months Ended
	Nov. 02, 2019	Oct. 31, 2020
Liabilities:
Contingent consideration agreement term	3 years
Contingent consideration	$ 4,372,000	$ 0
Fair Value, Measurements, Recurring
Assets:
Total assets measured at fair value	885,612,000	1,180,842,000
Liabilities:
Total liabilities measured at fair value	24,833,000	29,194,000
Contingent consideration	3,705,000
Fair Value, Measurements, Recurring \| Cash equivalents
Assets:
Cash equivalents	759,114,000	939,654,000
Fair Value, Measurements, Recurring \| Short-term investments
Assets:
Short-term investments	109,940,000	150,667,000
Fair Value, Measurements, Recurring \| Prepaid expenses and other
Assets:
Other assets	1,570,000	82,000
Fair Value, Measurements, Recurring \| Long-term investments
Assets:
Long-term investments	10,014,000
Fair Value, Measurements, Recurring \| Other long-term assets
Assets:
Other assets	4,974,000	90,439,000
Fair Value, Measurements, Recurring \| Accrued liabilities and other short-term obligations
Liabilities:
Accrued liabilities and other short-term obligations	35,000	681,000
Fair Value, Measurements, Recurring \| Other long-term obligations
Liabilities:
Other long-term obligations	24,798,000	28,513,000
Fair Value, Measurements, Recurring \| Level 1
Assets:
Total assets measured at fair value	764,088,000	947,867,000
Liabilities:
Total liabilities measured at fair value	0	0
Contingent consideration	0
Fair Value, Measurements, Recurring \| Level 1 \| Cash equivalents
Assets:
Cash equivalents	759,114,000	939,654,000
Fair Value, Measurements, Recurring \| Level 1 \| Short-term investments
Assets:
Short-term investments	0	0
Fair Value, Measurements, Recurring \| Level 1 \| Prepaid expenses and other
Assets:
Other assets	0	0
Fair Value, Measurements, Recurring \| Level 1 \| Long-term investments
Assets:
Long-term investments	0
Fair Value, Measurements, Recurring \| Level 1 \| Other long-term assets
Assets:
Other assets	4,974,000	8,213,000
Fair Value, Measurements, Recurring \| Level 1 \| Accrued liabilities and other short-term obligations
Liabilities:
Accrued liabilities and other short-term obligations	0	0
Fair Value, Measurements, Recurring \| Level 1 \| Other long-term obligations
Liabilities:
Other long-term obligations	0	0
Fair Value, Measurements, Recurring \| Level 2
Assets:
Total assets measured at fair value	121,524,000	232,975,000
Liabilities:
Total liabilities measured at fair value	21,128,000	29,194,000
Contingent consideration	0
Fair Value, Measurements, Recurring \| Level 2 \| Cash equivalents
Assets:
Cash equivalents	0	0
Fair Value, Measurements, Recurring \| Level 2 \| Short-term investments
Assets:
Short-term investments	109,940,000	150,667,000
Fair Value, Measurements, Recurring \| Level 2 \| Prepaid expenses and other
Assets:
Other assets	1,570,000	82,000
Fair Value, Measurements, Recurring \| Level 2 \| Long-term investments
Assets:
Long-term investments	10,014,000
Fair Value, Measurements, Recurring \| Level 2 \| Other long-term assets
Assets:
Other assets	0	82,226,000
Fair Value, Measurements, Recurring \| Level 2 \| Accrued liabilities and other short-term obligations
Liabilities:
Accrued liabilities and other short-term obligations	35,000	681,000
Fair Value, Measurements, Recurring \| Level 2 \| Other long-term obligations
Liabilities:
Other long-term obligations	21,093,000	28,513,000
Fair Value, Measurements, Recurring \| Level 3
Assets:
Total assets measured at fair value	0	0
Liabilities:
Total liabilities measured at fair value	3,705,000	0
Contingent consideration	3,705,000
Fair Value, Measurements, Recurring \| Level 3 \| Cash equivalents
Assets:
Cash equivalents	0	0
Fair Value, Measurements, Recurring \| Level 3 \| Short-term investments
Assets:
Short-term investments	0	0
Fair Value, Measurements, Recurring \| Level 3 \| Prepaid expenses and other
Assets:
Other assets	0	0
Fair Value, Measurements, Recurring \| Level 3 \| Long-term investments
Assets:
Long-term investments	0
Fair Value, Measurements, Recurring \| Level 3 \| Other long-term assets
Assets:
Other assets	0	0
Fair Value, Measurements, Recurring \| Level 3 \| Accrued liabilities and other short-term obligations
Liabilities:
Accrued liabilities and other short-term obligations	0	0
Fair Value, Measurements, Recurring \| Level 3 \| Other long-term obligations
Liabilities:
Other long-term obligations	$ 3,705,000	$ 0

Accounts Receivable (Details) - USD ($) $ in Thousands	12 Months Ended
Accounts Receivable (Details) - USD ($) $ in Thousands	Oct. 31, 2020	Nov. 02, 2019	Nov. 03, 2018
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Balance at beginning of period	$ 20,101	$ 17,378	$ 17,580
Provisions	8,855	6,740	2,700
Net Deductions	18,358	4,017	2,902
Balance at end of period	10,598	$ 20,101	$ 17,378
One Unidentified Customer \| Customer Concentration Risk \| Accounts Receivable
Concentration Risk [Line Items]
Net accounts receivable percentage		12.00%
Customer in APAC Region
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Net Deductions	$ 12,200

Inventories (Details) - USD ($) $ in Thousands	12 Months Ended
Inventories (Details) - USD ($) $ in Thousands	Oct. 31, 2020	Nov. 02, 2019	Nov. 03, 2018	Oct. 31, 2020	Nov. 02, 2019
Inventories
Raw materials				$ 119,481	$ 99,041
Work-in-process				13,738	13,657
Finished goods				210,050	226,622
Deferred cost of goods sold				40,747	53,051
Inventories before provision				384,016	392,371
Reserve for excess and obsolescence	$ (47,322)	$ (50,938)	$ (50,938)	(39,637)	(47,322)
Total inventories				$ 344,379	$ 345,049
Reserve for excess and obsolete inventory [Roll Forward]
Valuation allowance, beginning balance	47,322	50,938	51,206
Provisions	24,701	28,085	30,615
Disposals	32,386	31,701	30,883
Valuation allowance, ending balance	$ 39,637	$ 47,322	$ 50,938

Prepaid Expenses and Other (Details) - USD ($) $ in Thousands	12 Months Ended
	Oct. 31, 2020	Nov. 02, 2019	Nov. 03, 2018	Nov. 01, 2018
Capitalized Contract Cost [Line Items]
Prepaid VAT and other taxes	$ 72,838	$ 84,706
Prepaid expenses	70,647	48,680
Product demonstration equipment, net	44,793	38,900
Other non-trade receivables	21,981	28,136
Deferred deployment expense	604	125
Derivative assets	82	1,570
Restricted cash	0	74
Prepaid expenses and other	308,084	297,914
Depreciation of product demonstration equipment	9,000	8,800	$ 9,000
Contract assets for unbilled accounts receivable
Capitalized Contract Cost [Line Items]
Contract assets	85,843			$ 84,046
Capitalized contract acquisition costs
Capitalized Contract Cost [Line Items]
Contract assets	$ 11,296	$ 11,677

Equipment, Building, Furniture and Fixtures (Details) - USD ($) $ in Thousands	12 Months Ended
	Oct. 31, 2020	Nov. 02, 2019	Nov. 03, 2018
Property, Plant and Equipment, Net [Abstract]
Equipment, building, furniture and fixtures, gross		$ 710,398
Building subject to finance lease	$ 70,791
Equipment, building, furniture and fixtures, gross	683,429
Accumulated depreciation and amortization	(411,052)
Accumulated depreciation and amortization		(423,514)
Equipment, building, furniture and fixtures	272,377
Equipment, building, furniture and fixtures, net		286,884
Equipment, Building, and Furniture and Fixtures
Equipment, furniture and fixtures (Textuals) [Abstract]
Depreciation of equipment, furniture and fixtures, and amortization of leasehold improvements	84,900	78,800	$ 75,300
Equipment, furniture and fixtures
Property, Plant and Equipment, Net [Abstract]
Equipment, building, furniture and fixtures, gross	523,231	544,012
Building subject to finance lease
Property, Plant and Equipment, Net [Abstract]
Equipment, building, furniture and fixtures, gross		71,760
Leasehold improvements
Property, Plant and Equipment, Net [Abstract]
Equipment, building, furniture and fixtures, gross	$ 89,407	$ 94,626

Intangible Assets (Details) - USD ($) $ in Thousands	12 Months Ended
Intangible Assets (Details) - USD ($) $ in Thousands	Oct. 31, 2020	Nov. 02, 2019	Nov. 03, 2018
Intangible Assets
Gross Intangible	$ 773,950	$ 751,472
Accumulated Amortization	(677,303)	(638,691)
Net Intangible	96,647	112,781
Amortization of intangible assets	38,619	35,136	$ 25,806
Expected future amortization of finite-lived intangible assets
2021	35,452
2022	29,232
2023	14,422
2024	11,371
2025	6,170
Net Intangible	96,647	112,781
Developed technology
Intangible Assets
Gross Intangible	395,726	373,526
Accumulated Amortization	(335,512)	(308,261)
Net Intangible	60,214	65,265
Expected future amortization of finite-lived intangible assets
Net Intangible	60,214	65,265
Patents and licenses
Intangible Assets
Gross Intangible	3,565	3,565
Accumulated Amortization	(2,529)	(2,244)
Net Intangible	1,036	1,321
Expected future amortization of finite-lived intangible assets
Net Intangible	1,036	1,321
Customer relationships, covenants not to compete, outstanding purchase orders and contracts
Intangible Assets
Gross Intangible	374,659	374,381
Accumulated Amortization	(339,262)	(328,186)
Net Intangible	35,397	46,195
Expected future amortization of finite-lived intangible assets
Net Intangible	$ 35,397	$ 46,195

Goodwill (Details) $ in Thousands	12 Months Ended
Goodwill (Details) $ in Thousands	Oct. 31, 2020 USD ($)
Goodwill [Roll Forward]
Goodwill beginning balance	$ 297,937
Acquisitions	13,055
Impairments	0
Translation	(145)
Goodwill ending balance	310,847
Operating Segments \| Platform Software and Services
Goodwill [Roll Forward]
Goodwill beginning balance	156,191
Acquisitions	0
Impairments	0
Translation	0
Goodwill ending balance	156,191
Operating Segments \| Blue Planet Automation Software and Services
Goodwill [Roll Forward]
Goodwill beginning balance	75,994
Acquisitions	13,055
Impairments	0
Translation	0
Goodwill ending balance	89,049
Operating Segments \| Networking Platforms
Goodwill [Roll Forward]
Goodwill beginning balance	65,752
Acquisitions	0
Impairments	0
Translation	(145)
Goodwill ending balance	$ 65,607

Other Balance Sheet Details - Other Long Term Assets (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Oct. 31, 2020	Oct. 31, 2020	Nov. 02, 2019	Nov. 03, 2018
Other long-term assets
Maintenance spares inventory, net	$ 62,077	$ 62,077	$ 55,482
Equity investments	13,408	13,408	10,727
Capitalized contract acquisition costs	4,001	4,001	3,994
Deferred debt issuance costs, net	1,596	1,596	1,609
Restricted cash	84	84	42
Other	21,664	21,664	17,132
Total	102,830	102,830	88,986
Unrealized gain on equity investment	$ 2,700	2,681	0	$ 0
Revolving Credit Facility
Other long-term assets
Amortization of debt issuance costs included in interest expense		$ 400	$ 300	$ 300

Other Balance Sheet Details - Accrued Liabilities (Details) - USD ($)	Oct. 31, 2020	Nov. 03, 2019	Nov. 02, 2019	Nov. 03, 2018	Oct. 31, 2017
Accrued liabilities
Compensation, payroll related tax and benefits	$ 135,462,000		$ 182,363,000
Warranty	49,868,000		48,498,000	$ 44,740,000	$ 42,456,000
Vacation	26,945,000		22,290,000
Contingent consideration	0		4,372,000
Finance lease liability	2,836,000
Finance lease liability			2,764,000
Interest payable	672,000		1,007,000
Other	118,349,000		121,446,000
Total	$ 334,132,000	$ 381,256,000	$ 382,740,000

Other Balance Sheet Details - Accrued Warranty (Details) - USD ($) $ in Thousands	12 Months Ended
	Oct. 31, 2020	Nov. 02, 2019	Nov. 03, 2018
Movement in Standard Product Warranty Accrual [Roll Forward]
Beginning balance	$ 48,498	$ 44,740	$ 42,456
Current Year Provisions	22,417	23,105	20,992
Settlements	21,047	19,347	18,708
Balance at end of period	$ 49,868	$ 48,498	$ 44,740

Other Balance Sheet Details - Deferred Revenue (Details) - USD ($) $ in Thousands	Oct. 31, 2020	Nov. 02, 2019
Deferred Revenue Arrangement [Line Items]
Total	$ 158,363	$ 156,873
Less current portion	(108,700)	(111,381)
Long-term deferred revenue	49,663	45,492
Products
Deferred Revenue Arrangement [Line Items]
Total	17,534	27,366
Services
Deferred Revenue Arrangement [Line Items]
Total	$ 140,829	$ 129,507

Other Balance Sheet Details - Other Long-Term Obligations (Details) - USD ($) $ in Thousands	Oct. 31, 2020	Nov. 03, 2019	Nov. 02, 2019
Balance Sheet Related Disclosures [Abstract]
Finance lease liability	$ 61,565
Finance lease liability			$ 65,284
Income tax liability	16,386		20,546
Interest rate swap liability	28,513		21,093
Deferred tenant allowance	0		6,248
Straight-line rent			5,434
Contingent consideration	0		3,705
Other	16,721		26,437
Other long-term obligations	$ 123,185	$ 127,503	$ 148,747

Derivative Instruments (Details) - USD ($) $ in Millions	12 Months Ended
Derivative Instruments (Details) - USD ($) $ in Millions	Oct. 31, 2020	Nov. 02, 2019
Maximum
Derivative Instruments, Gain (Loss) [Line Items]
Foreign exchange contract maturities	24 months
Designated as Hedging Instrument \| Foreign currency forward contracts \| Cash Flow Hedging
Derivative Instruments, Gain (Loss) [Line Items]
Notional principal of contract	$ 254.9	$ 197.4
Designated as Hedging Instrument \| Foreign currency forward contracts \| Cash Flow Hedging \| Maximum
Derivative Instruments, Gain (Loss) [Line Items]
Foreign exchange contract maturities	24 months
Designated as Hedging Instrument \| Forward starting interest rate swaps \| Cash Flow Hedging \| Old 2025 Term Loan \| Secured Debt
Derivative Instruments, Gain (Loss) [Line Items]
Notional principal of contract	$ 350.0
Fixed interest amount resulting from interest rate swap	2.957%
Not Designated as Hedging Instrument \| Foreign currency forward contracts
Derivative Instruments, Gain (Loss) [Line Items]
Notional principal of contract	$ 212.0	$ 206.0
Not Designated as Hedging Instrument \| Foreign currency forward contracts \| Maximum
Derivative Instruments, Gain (Loss) [Line Items]
Foreign exchange contract maturities	12 months

Accumulated Other Comprehensive Income (Details) - USD ($) $ in Thousands	12 Months Ended
	Oct. 31, 2020	Nov. 02, 2019	Nov. 03, 2018
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	$ 2,172,761	$ 1,929,334	$ 2,136,342
Other comprehensive gain (loss) before reclassifications	(20,474)	(19,120)	3,481
Amounts reclassified from AOCI	7,200	2,816	1,756
Ending balance	2,509,597	2,172,761	1,929,334
AOCI Attributable to Parent
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	(22,084)	(5,780)	(11,017)
Ending balance	(35,358)	(22,084)	(5,780)
Available-for-Sale Securities
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	152	(425)	(451)
Other comprehensive gain (loss) before reclassifications	(107)	577	26
Amounts reclassified from AOCI	0	0	0
Ending balance	45	152	(425)
Unrealized Gain/Losses on Derivative Instruments \| Foreign currency forward contracts
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	925	(3,060)	(1,386)
Other comprehensive gain (loss) before reclassifications	(3,891)	14	(3,242)
Amounts reclassified from AOCI	2,747	3,971	1,568
Ending balance	(219)	925	(3,060)
Unrealized Gain/Losses on Derivative Instruments \| Forward starting interest rate swaps
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	(13,686)	6,417	218
Other comprehensive gain (loss) before reclassifications	(12,302)	(18,948)	6,011
Amounts reclassified from AOCI	4,453	(1,155)	188
Ending balance	(21,535)	(13,686)	6,417
Foreign Currency Translation Adjustment
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	(9,475)	(8,712)	(9,398)
Other comprehensive gain (loss) before reclassifications	(4,174)	(763)	686
Amounts reclassified from AOCI	0	0	0
Ending balance	$ (13,649)	$ (9,475)	$ (8,712)

Leases - Narrative (Details) $ in Thousands, ft² in Millions	12 Months Ended
	Oct. 31, 2020 USD ($) ft²	Nov. 02, 2019 USD ($)	Nov. 03, 2018 USD ($)	Oct. 31, 2017 USD ($)
Lessee, Lease, Description [Line Items]
Area leased (in sq ft) \| ft²	1.3
Remaining lease term (up to)	12 years
Extension term (up to)	10 years
Termination period (up to)	6 years
Restructuring reserve	$ 2,915	$ 15,143	$ 3,847	$ 2,939
ROU assets that involve subleased or vacant space	$ 5,000
Facility Closing, Vacated Office Space
Lessee, Lease, Description [Line Items]
Restructuring reserve		$ 11,100

Leases - Leases Included in the Balance Sheet (Details) - USD ($) $ in Thousands	Oct. 31, 2020	Nov. 03, 2019
Operating leases:
Operating ROU Assets	$ 57,026	$ 53,334
Operating lease liabilities	80,450	$ 76,000
Finance leases:
Buildings, gross	70,791
Less: accumulated depreciation	(17,837)
Buildings, net	52,954
Finance lease liabilities	$ 64,401
Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List]	us-gaap:PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization
Accrued liabilities and other short-term obligations
Finance leases:
Finance lease liabilities	$ 64,401
Other long-term obligations
Finance leases:
Finance lease liabilities	$ 64,401

Leases - Lease Cost (Details) $ in Thousands	12 Months Ended
Leases - Lease Cost (Details) $ in Thousands	Oct. 31, 2020 USD ($)
Leases [Abstract]
Operating lease costs	$ 17,544
Finance lease cost:
Amortization of finance ROU asset	4,465
Interest on finance lease liabilities	4,777
Total finance lease cost	9,242
Non-capitalized lease cost	2,976
Variable lease cost	5,185
Net lease cost	34,947
Leasehold Improvements
Property, Plant and Equipment [Line Items]
Amortization	$ 11,000

Leases - Leases Maturity (Details) - USD ($) $ in Thousands	Oct. 31, 2020	Nov. 03, 2019
Operating Leases
2021	$ 20,989
2022	18,689
2023	15,415
2024	13,118
2025	8,838
Thereafter	9,365
Total lease payments	86,414
Less: Imputed interest	(5,964)
Present value of lease liabilities	80,450	$ 76,000
Less: Current portion of present value of minimum lease payments	(19,035)	(20,498)
Long-term portion of present value of minimum lease payments	61,415	$ 55,564
Finance Leases
2021	7,444
2022	7,754
2023	7,958
2024	7,958
2025	8,118
Thereafter	58,101
Total lease payments	97,333
Less: Imputed interest	(32,932)
Present value of lease liabilities	64,401
Less: Current portion of present value of minimum lease payments	(2,836)
Long-term portion of present value of minimum lease payments	61,565
Total
2021	28,433
2022	26,443
2023	23,373
2024	21,076
2025	16,956
Thereafter	67,466
Total lease payments	183,747
Less: Imputed interest	(38,896)
Present value of lease liabilities	144,851
Less: Current portion of present value of minimum lease payments	(21,871)
Long-term portion of present value of minimum lease payments	$ 122,980

Leases - Weighted Average Remaining Lease Terms and Discount Rates (Details)	Oct. 31, 2020
Weighted-average remaining lease term in years:
Operating leases	4 years 10 months 13 days
Finance leases	11 years 8 months 15 days
Weighted-average discount rates:
Operating leases	2.82%
Finance leases	7.56%

Leases - Minimum Aggregate Rentals Under Operating Leases (Details) $ in Thousands	Nov. 02, 2019 USD ($)
Leases [Abstract]
2020	$ 28,776
2021	24,184
2022	16,767
2023	13,393
2024	10,632
Thereafter	26,110
Total	$ 119,862

Short-Term and Long-Term Debt - Net Carrying Values of Term Loans (Details) - Secured Debt - USD ($) $ in Thousands	Oct. 31, 2020	Jan. 23, 2020	Nov. 02, 2019
Debt Instrument [Line Items]
Deferred Debt Issuance Costs	$ (2,900)		$ (3,600)
New 2025 Term Loan
Debt Instrument [Line Items]
Principal Balance	687,802	$ 693,000
Unamortized Discount	(1,577)
Deferred Debt Issuance Costs	(2,939)
Net Carrying Value	683,286		0
Old 2025 Term Loan
Debt Instrument [Line Items]
Principal Balance	0	693,000
Unamortized Discount	0	(1,900)
Deferred Debt Issuance Costs	0	$ (3,400)
Net Carrying Value	$ 0		$ 687,406

Short-Term and Long-Term Debt (Details) - Secured Debt - USD ($) $ in Thousands			12 Months Ended
	Jan. 23, 2020	Sep. 28, 2018	Oct. 31, 2020	Nov. 02, 2019
Debt Instrument [Line Items]
Deferred debt issuance costs			$ 2,900	$ 3,600
Amortization of debt issuance costs included in interest expense			600
Proceeds from (repayments to) term loan		$ 305,100
New 2025 Term Loan
Debt Instrument [Line Items]
Deferred debt issuance costs			2,939
Fair value of debt			686,100
Outstanding aggregate principal amount	$ 693,000		687,802
Installment payment	1,730
Debt issuance costs expensed	$ 400
Debt discount			1,577
Installment payment, percentage	0.25%
Prepayment premium	1.00%
New 2025 Term Loan \| London Interbank Offered Rate (LIBOR)
Debt Instrument [Line Items]
Interest rate floor	0.00%
Basis spread on variable rate	1.75%
New 2025 Term Loan \| Base Rate
Debt Instrument [Line Items]
Interest rate floor	1.00%
Basis spread on variable rate	1.00%
Old 2025 Term Loan
Debt Instrument [Line Items]
Deferred debt issuance costs	$ 3,400		0
Proceeds from term loan		699,100
Outstanding aggregate principal amount	693,000		0
Debt discount	$ 1,900		$ 0
Term Loan Payable due January 30, 2022
Debt Instrument [Line Items]
Repayments of term loan		$ 394,000

ABL Credit Facility (Details)	Oct. 31, 2020 USD ($)
Letter of Credit
Line of Credit Facility [Line Items]
Letters of credit collateralized by the credit facility	$ 83,000,000.0
Revolving Credit Facility
Line of Credit Facility [Line Items]
Current borrowing capacity	300,000,000
Line of credit outstanding	$ 0

- Definition

The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

+ References + Details

Earnings (Loss) Per Share Calculation - Reconciliation of Numerator and Denominator of Basic and Diluted Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Oct. 31, 2020	Nov. 02, 2019	Nov. 03, 2018
Numerator
Net income (loss)	$ 361,291	$ 253,434	$ (344,690)
Less: Loss on fair value of debt conversion liability	0	0	(12,894)
Net income (loss) used to calculate Diluted EPS	$ 361,291	$ 253,434	$ (357,584)
Denominator
Basic weighted average shares outstanding (in shares)	154,287	155,720	143,738
Add: Shares underlying outstanding stock options, employee stock purchase plan and restricted stock units (in shares)	1,668	1,892	0
Diluted weighted average shares outstanding (in shares)	155,955	157,612	143,738
Earning Per Share [Abstract]
Basic EPS (in dollars per share)	$ 2.34	$ 1.63	$ (2.40)
Diluted EPS (in dollars per share)	$ 2.32	$ 1.61	$ (2.49)

Earnings (Loss) Per Share Calculation - Weighted Average Shares Excluded from Calculation of Denominator for Basic and Diluted EPS (Details) - shares shares in Thousands	12 Months Ended
	Oct. 31, 2020	Nov. 02, 2019	Nov. 03, 2018
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Total excluded due to anti-dilutive effect (in shares)	263	234	16,021
3.75% Convertible Senior Notes due October 15, 2018 (New)
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Interest rate on convertible notes	3.75%		0.0375%
3.75% Convertible Senior Notes due October 15, 2018 (Original)
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Interest rate on convertible notes	0.0375%
4.0% Convertible Senior Notes due December 15, 2020
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Interest rate on convertible notes			0.04%
Shares underlying stock options and restricted stock units
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Total excluded due to anti-dilutive effect (in shares)	263	234	2,235
Convertible Senior Notes \| 3.75% Convertible Senior Notes due October 15, 2018 (New)
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Total excluded due to anti-dilutive effect (in shares)	0	0	1,780
Convertible Senior Notes \| 3.75% Convertible Senior Notes due October 15, 2018 (Original)
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Total excluded due to anti-dilutive effect (in shares)	0	0	2,883
Convertible Senior Notes \| 4.0% Convertible Senior Notes due December 15, 2020
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Total excluded due to anti-dilutive effect (in shares)	0	0	9,123

Stockholders' Equity (Details) - USD ($)	12 Months Ended
Stockholders' Equity (Details) - USD ($)	Oct. 31, 2020	Nov. 02, 2019	Nov. 03, 2018	Dec. 13, 2018
Equity [Abstract]
Stock repurchase program authorized amount				$ 500,000,000
Shares repurchased for tax witholdings on vesting of restricted stock units	$ 32,472,000	$ 29,059,000	$ 4,757,000

Stockholders' Equity - Summary of Stock Repurchase Program (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Oct. 31, 2020	Nov. 02, 2019
Shares Repurchased
Beginning balance (in shares)	3,838,466,000	0
Repurchase of common stock under the stock repurchase program (in shares)	1,872,446,000	3,838,466,000
Ending balance (in shares)	5,710,912,000	3,838,466,000
Weighted-Average Price per Share
Beginning balance (in USD per share)	$ 39.10	$ 0
Repurchase of common stock under the stock repurchase program (in dollars per share)	39.81	39.10
Ending balance (in USD per share)	$ 39.33	$ 39.10
Amount Repurchased (in thousands)
Beginning balance	$ 150,076	$ 0
Repurchase of common stock under the stock repurchase program	74,535	150,076
Ending balance	$ 224,611	$ 150,076

Income Taxes - Provision (Benefit) for Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Oct. 31, 2020	Nov. 02, 2019	Nov. 03, 2018
Current:
Federal	$ 4,363	$ 13,143	$ 8,327
State	13,328	16,945	8,219
Foreign	12,640	9,816	13,294
Total current	30,331	39,904	29,840
Deferred:
Federal	60,679	31,872	475,951
State	4,607	(9,159)	(8,202)
Foreign	(947)	(2,861)	(4,118)
Total deferred	64,339	19,852	463,631
Provision for income taxes	$ 94,670	$ 59,756	$ 493,471

Income Taxes - Income before Provision (Benefit) for Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Oct. 31, 2020	Nov. 02, 2019	Nov. 03, 2018
Income (loss) before provision (benefit) for income taxes:
United States	$ 387,697	$ 256,461	$ 106,972
Foreign	68,264	56,729	41,809
Income before income taxes	$ 455,961	$ 313,190	$ 148,781

Income Taxes - Effective Income Tax Rate (Details)	12 Months Ended
Income Taxes - Effective Income Tax Rate (Details)	Oct. 31, 2020	Nov. 02, 2019	Nov. 03, 2018
Income tax rate reconciliation:
Provision at statutory rate	21.00%	21.00%	23.41%
Deferred tax assets remeasurement	0.00%	0.00%	294.56%
Base Erosion and Anti-Abuse Tax	(1.02%)	3.60%	0.00%
State taxes	2.21%	2.18%	(0.16%)
Foreign taxes	0.51%	(0.37%)	1.22%
Research and development credit	(7.74%)	(7.53%)	(8.80%)
Non-deductible compensation	1.79%	1.01%	3.39%
Fair value of debt conversion liability	0.00%	0.00%	1.90%
Transition tax	0.02%	0.29%	23.23%
Valuation allowance	3.58%	(2.13%)	(11.95%)
Other	0.41%	1.03%	4.88%
Effective income tax rate	20.76%	19.08%	331.68%

Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
Income Taxes (Details) - USD ($) $ in Thousands	Oct. 31, 2020	Nov. 02, 2019	Nov. 03, 2018	Nov. 01, 2017	Oct. 31, 2017
Valuation Allowance [Line Items]
Provision at statutory rate	21.00%	21.00%	23.41%
Provisional tax expense from enactment of the Tax Act		$ 472,800
Unrecognized tax benefits, interest and penalties accrued	$ 3,900	3,000
Interest and penalties expense (benefit)	900	1,000	$ 1,100
Cumulative unremitted earnings of non-U.S. affiliates	375,000
Cumulative amount of temporary differences for unremitted foreign earnings for which a deferred tax liability has not been recognized	25,000
Valuation allowance	151,427	135,978	142,650		$ 185,898
Income tax credit carryforwards subject to expiration	38,200
Stockholder's equity	2,509,597	2,172,761	1,929,334		2,136,342
Effect of adoption of new accounting standard
Valuation Allowance [Line Items]
Stockholder's equity			49,805		62,123
Retained Earnings
Valuation Allowance [Line Items]
Stockholder's equity	$ (4,283,122)	$ (4,644,413)	(4,947,652)		(4,664,253)
Retained Earnings \| Effect of adoption of new accounting standard
Valuation Allowance [Line Items]
Stockholder's equity			$ 49,805		$ 61,291
Retained Earnings \| Effect of adoption of new accounting standard \| Accounting Standards Update 2016-09
Valuation Allowance [Line Items]
Stockholder's equity				$ 62,100

Income Taxes - Components of Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Oct. 31, 2020	Nov. 02, 2019	Nov. 03, 2018	Oct. 31, 2017
Deferred tax assets:
Reserves and accrued liabilities	$ 73,825	$ 54,183
Depreciation and amortization	504,233	455,007
NOL and credit carry forward	188,157	302,325
Other	33,017	39,405
Gross deferred tax assets	799,232	850,920
Valuation allowance	(151,427)	(135,978)	$ (142,650)	$ (185,898)
Deferred tax asset, net of valuation allowance	$ 647,805	$ 714,942

Income Taxes - Reconciliation of Unrecognized Tax Benefits (Details) - USD ($) $ in Thousands	12 Months Ended
	Oct. 31, 2020	Nov. 02, 2019	Nov. 03, 2018
Reconciliation of the beginning and ending amount of unrecognized tax benefits, excluding interest and penalties
Unrecognized tax benefits, beginning balance	$ 94,604	$ 96,363	$ 141,582
Decrease related to positions taken in prior period			(46,400)
Increase related to positions taken in prior period	653	1,959
Increase related to positions taken in current period	1,151		2,482
Reductions related to settlements with taxing authorities		(1,224)
Reductions related to expiration of statute of limitations	(660)	(2,494)	(1,301)
Unrecognized tax benefits, ending balance	$ 95,748	$ 94,604	$ 96,363

Income Taxes - Valuation Allowance of Gross Deferred Tax Assets (Details) - USD ($) $ in Thousands	12 Months Ended
	Oct. 31, 2020	Nov. 02, 2019	Nov. 03, 2018
Valuation allowance against gross deferred tax assets:
Valuation allowance, beginning balance	$ 135,978	$ 142,650	$ 185,898
Additions	25,749	27,459	23,720
Deductions	10,300	34,131	66,968
Valuation allowance, ending balance	$ 151,427	$ 135,978	$ 142,650

Share-Based Compensation Expense (Details) $ / shares in Units, $ in Millions		12 Months Ended
	Apr. 02, 2020 shares	Oct. 31, 2020 USD ($) period $ / shares shares	Nov. 02, 2019 USD ($) $ / shares shares	Nov. 03, 2018 USD ($) $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares granted during the period (in shares)		0	0	0
Unrecognized share-based compensation \| $		$ 111.9
Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period of service-based awards		4 years
Intrinsic value of option exercised \| $		$ 1.3	$ 0.8	$ 2.2
Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Awards outstanding (in shares)		4,049,000	4,010,000
Total fair value of restricted stock units vested and converted into common stock \| $		$ 83.5	$ 79.2	$ 54.3
Weighted average fair value of each restricted stock unit granted (in dollars per share) \| $ / shares		$ 41.61	$ 34.53	$ 22.46
Nonvested award compensation cost not yet recognized, period for recognition		1 year 5 months 19 days
Restricted Stock Units (RSUs) \| Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period of service-based awards		3 years
Restricted Stock Units (RSUs) \| Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period of service-based awards		4 years
Performance Based Awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Awards outstanding (in shares)		400,000	300,000
2017 Omnibus Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Maximum expiration period of incentive awards		10 years
Increase in number of shares authorized (in shares)	12,200,000
Number of shares authorized (in shares)		21,100,000
Remaining authorized shares available for issuance (in shares)		14,700,000
2017 Omnibus Incentive Plan \| Employee Stock Options and Stock Appreciation Rights
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Maximum expiration period of incentive awards		10 years
Minimum exercise price, percentage of fair market value on grant date		100.00%
2017 Omnibus Incentive Plan \| Restricted Stock Units (RSUs) \| Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period of service-based awards		1 year
Employee Stock Purchase Plan \| Employee Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Remaining authorized shares available for issuance (in shares)		4,300,000
Offer period for ESPP		12 months
Number of purchase periods in offer period \| period		2
Purchase period		6 months
ESPP discount percentage purchase date		85.00%
Maximum number of shares increase under ESPP (in shares)		600,000
Shares issued under ESPP (in shares)		700,000	1,000,000.0	1,100,000
Employee Stock Purchase Plan \| Employee Stock \| Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares authorized (in shares)		8,200,000

Share-Based Compensation Expense - Summary of Stock Option Activity (Details) - $ / shares	12 Months Ended
	Oct. 31, 2020	Nov. 02, 2019	Nov. 03, 2018
Shares Underlying Options Outstanding
Beginning Balance (in shares)	220,000
Granted (in shares)	0	0	0
Exercised (in shares)	(105,000)
Canceled (in shares)	(8,000)
Ending Balance (in shares)	107,000	220,000
Weighted Average Exercise Price
Beginning Balance (in dollars per share)	$ 35.54
Granted (in dollars per share)	0
Exercised (in dollars per share)	40.27
Canceled (in dollars per share)	28.22
Ending Balance (in dollars per share)	$ 31.41	$ 35.54

Share-Based Compensation Expense - Stock Options Outstanding (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Oct. 31, 2020	Nov. 02, 2019
Summarizes information with respect to stock options outstanding
Weighted average exercise price, (in dollars per share)	$ 31.41	$ 35.54
$11.34 to $15.00
Summarizes information with respect to stock options outstanding
Range of exercise price, lower (in dollars per share)	11.34
Range of exercise price, upper (in dollars per share)	$ 15.00
Number of underlying shares (in shares)	37
Weighted average remaining contractual life (in years)	2 years 3 months 29 days
Weighted average exercise price, (in dollars per share)	$ 13.60
Aggregate intrinsic value	$ 943
$17.50 to $18.22
Summarizes information with respect to stock options outstanding
Range of exercise price, lower (in dollars per share)	$ 17.50
Range of exercise price, upper (in dollars per share)	$ 18.22
Number of underlying shares (in shares)	9
Weighted average remaining contractual life (in years)	1 year 11 months 19 days
Weighted average exercise price, (in dollars per share)	$ 18.16
Aggregate intrinsic value	$ 203
$32.06 to $37.10
Summarizes information with respect to stock options outstanding
Range of exercise price, lower (in dollars per share)	$ 32.06
Range of exercise price, upper (in dollars per share)	$ 37.10
Number of underlying shares (in shares)	19
Weighted average remaining contractual life (in years)	2 years 3 months 3 days
Weighted average exercise price, (in dollars per share)	$ 35.89
Aggregate intrinsic value	$ 67
$41.52 to $55.63
Summarizes information with respect to stock options outstanding
Range of exercise price, lower (in dollars per share)	$ 41.52
Range of exercise price, upper (in dollars per share)	$ 55.63
Number of underlying shares (in shares)	42
Weighted average remaining contractual life (in years)	2 years 7 months 17 days
Weighted average exercise price, (in dollars per share)	$ 47.87
Aggregate intrinsic value	$ 0
$11.34 to $55.63
Summarizes information with respect to stock options outstanding
Range of exercise price, lower (in dollars per share)	$ 11.34
Range of exercise price, upper (in dollars per share)	$ 55.63
Number of underlying shares (in shares)	107
Weighted average remaining contractual life (in years)	2 years 4 months 28 days
Weighted average exercise price, (in dollars per share)	$ 31.41
Aggregate intrinsic value	$ 1,213

Share-Based Compensation Expense - Assumptions for Awards Granted (Details) - Performance Based Awards	12 Months Ended
	Oct. 31, 2020	Nov. 02, 2019	Oct. 31, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected volatility of Ciena common stock, which is a weighted average of implied volatility and historical volatility	31.77%	34.10%	34.93%
Historical volatility of Ciena common stock	36.29%	36.80%	38.24%
Historical volatility of S&P Networking Index	18.40%	17.39%	17.14%
Correlation coefficient	0.5891	0.6251	0.6597
Expected life in years	2 years 10 months 13 days	2 years 10 months 13 days	2 years 10 months 20 days
Risk-free interest rate	1.65%	2.62%	1.94%
Expected dividend yield	0.00%	0.00%	0.00%

Share-Based Compensation Expense - Restricted Stock Units (Details) - Restricted Stock Units (RSUs) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Oct. 31, 2020	Nov. 02, 2019
Summary of Restricted Stock Unit Activity
Restricted shares outstanding, Beginning balance (in shares)	4,010
Restricted stock units outstanding, granted (in shares)	2,195
Restricted stock units outstanding, vested (in shares)	(1,945)
Restricted stock units outstanding, canceled or forfeited (in shares)	(211)
Restricted shares outstanding, Ending balance (in shares)	4,049
Weighted average grant date fair value per share (in dollars per share)	$ 35.08	$ 27.94
Aggregate fair value	$ 159,498	$ 146,091

Share-Based Compensation Expense - Components of Expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Oct. 31, 2020	Nov. 02, 2019	Nov. 03, 2018
Share-based compensation expense
Share-based compensation expense capitalized in inventory, net	$ 118	$ 57	$ (101)
Total share-based compensation	67,758	59,736	52,972
Share-based compensation expense included in cost of goods sold
Share-based compensation expense
Share-based compensation expense included in operating expense	7,035	6,043	5,600
Product cost of goods sold
Share-based compensation expense
Share-based compensation expense included in operating expense	3,182	2,868	2,984
Service cost of goods sold
Share-based compensation expense
Share-based compensation expense included in operating expense	3,853	3,175	2,616
Share-based compensation expense included in operating expense
Share-based compensation expense
Share-based compensation expense included in operating expense	60,605	53,636	47,473
Research and development
Share-based compensation expense
Share-based compensation expense included in operating expense	16,987	14,321	13,518
Sales and marketing
Share-based compensation expense
Share-based compensation expense included in operating expense	20,194	16,474	14,246
General and administrative
Share-based compensation expense
Share-based compensation expense included in operating expense	$ 23,424	$ 22,841	$ 19,709

Segment and Entity Wide Disclosures - Segment Reporting (Details) $ in Thousands	12 Months Ended
	Oct. 31, 2020 USD ($) segment	Nov. 02, 2019 segment	Nov. 03, 2019 USD ($)
Segment Reporting Information [Line Items]
Number of operating segments \| segment	4
Equipment, building, furniture and fixtures, net \| $	$ 272,377
Operating right-of-use assets \| $	$ 57,026		$ 53,334
Networking Platform and Blue Planet Automation Software and Services
Segment Reporting Information [Line Items]
Number of operating segments \| segment		2

Segment and Entity Wide Disclosures - Other Intangibles Assets, Goodwill and Maintenance Spares (Details) - USD ($) $ in Thousands	Oct. 31, 2020	Nov. 02, 2019
Segment Reporting Information [Line Items]
Other intangible assets, net	$ 96,647	$ 112,781
Goodwill	310,847	297,937
Maintenance spares, net	62,077	55,482
Operating Segments \| Global Services
Segment Reporting Information [Line Items]
Other intangible assets, net	0
Goodwill	0
Maintenance spares, net	62,077
Operating Segments \| Networking Platforms
Segment Reporting Information [Line Items]
Other intangible assets, net	10,977
Goodwill	65,607	65,752
Maintenance spares, net	0
Operating Segments \| Platform Software and Services
Segment Reporting Information [Line Items]
Other intangible assets, net	0
Goodwill	156,191	156,191
Maintenance spares, net	0
Operating Segments \| Blue Planet Automation Software and Services
Segment Reporting Information [Line Items]
Other intangible assets, net	85,670
Goodwill	89,049	$ 75,994
Maintenance spares, net	$ 0

Segment and Entity Wide Disclosures - Segment Revenue, Profit (loss) and the reconciliation to consolidated net income (loss) (Details) - USD ($) $ in Thousands	12 Months Ended
	Oct. 31, 2020	Nov. 02, 2019	Nov. 03, 2018
Revenue:
Revenues	$ 3,532,157	$ 3,572,131	$ 3,094,286
Less: non-performance operating expenses
Selling and marketing	416,425	423,046	394,060
General and administrative	169,548	174,399	160,133
Amortization of intangible assets	23,383	21,808	15,737
Acquisition and integration costs	4,031	3,370	5,111
Add: other non-performance financial items
Interest and other income (loss), net	964	3,876	(12,029)
Interest expense	(31,321)	(37,452)	(55,249)
Loss on extinguishment and modification of debt	(646)	0	(13,887)
Provision for income taxes	94,670	59,756	493,471
Net income (loss)	361,291	253,434	(344,690)
Converged Packet Optical
Revenue:
Revenues	2,547,647	2,562,841
Packet Networking
Revenue:
Revenues	267,416	348,477
Platform Software and Services
Revenue:
Revenues	197,809	155,376
Blue Planet Automation Software and Services
Revenue:
Revenues	62,632	54,555
Maintenance Support and Training
Revenue:
Revenues	269,354	261,337
Installation and Deployment
Revenue:
Revenues	152,003	148,233
Consulting and Network Design
Revenue:
Revenues	35,296	41,312
Operating Segments
Revenue:
Revenues	3,532,157	3,572,131	3,094,286
Segment profit (loss) and the reconciliation to consolidated net income (loss)
Gross profit	1,123,003	993,927	823,126
Operating Segments \| Networking Platforms
Revenue:
Revenues	2,815,063	2,911,318	2,478,018
Segment profit (loss) and the reconciliation to consolidated net income (loss)
Gross profit	827,105	759,244	581,113
Operating Segments \| Platform Software and Services
Revenue:
Revenues	197,809	155,376
Segment profit (loss) and the reconciliation to consolidated net income (loss)
Gross profit	105,609	64,210	78,048
Operating Segments \| Blue Planet Automation Software and Services
Revenue:
Revenues	62,632	54,555
Segment profit (loss) and the reconciliation to consolidated net income (loss)
Gross profit	(12,446)	(17,769)	(8,240)
Operating Segments \| Global Services
Revenue:
Revenues	456,653	450,882	415,555
Segment profit (loss) and the reconciliation to consolidated net income (loss)
Gross profit	202,735	188,242	172,205
Operating Segments \| Converged Packet Optical \| Networking Platforms
Revenue:
Revenues	2,547,647	2,562,841	2,194,519
Operating Segments \| Converged Packet Optical \| Platform Software and Services
Revenue:
Revenues	0	0
Operating Segments \| Converged Packet Optical \| Blue Planet Automation Software and Services
Revenue:
Revenues	0	0
Operating Segments \| Converged Packet Optical \| Global Services
Revenue:
Revenues	0	0
Operating Segments \| Packet Networking \| Networking Platforms
Revenue:
Revenues	267,416	348,477	283,499
Operating Segments \| Packet Networking \| Platform Software and Services
Revenue:
Revenues	0	0
Operating Segments \| Packet Networking \| Blue Planet Automation Software and Services
Revenue:
Revenues	0	0
Operating Segments \| Packet Networking \| Global Services
Revenue:
Revenues	0	0
Operating Segments \| Platform Software and Services \| Networking Platforms
Revenue:
Revenues	0	0
Operating Segments \| Platform Software and Services \| Platform Software and Services
Revenue:
Revenues	197,809	155,376	173,949
Operating Segments \| Platform Software and Services \| Blue Planet Automation Software and Services
Revenue:
Revenues	0	0
Operating Segments \| Platform Software and Services \| Global Services
Revenue:
Revenues	0	0
Operating Segments \| Blue Planet Automation Software and Services \| Networking Platforms
Revenue:
Revenues	0	0
Operating Segments \| Blue Planet Automation Software and Services \| Platform Software and Services
Revenue:
Revenues	0	0
Operating Segments \| Blue Planet Automation Software and Services \| Blue Planet Automation Software and Services
Revenue:
Revenues	62,632	54,555	26,764
Operating Segments \| Blue Planet Automation Software and Services \| Global Services
Revenue:
Revenues	0	0
Operating Segments \| Maintenance Support and Training \| Networking Platforms
Revenue:
Revenues	0	0
Operating Segments \| Maintenance Support and Training \| Platform Software and Services
Revenue:
Revenues	0	0
Operating Segments \| Maintenance Support and Training \| Blue Planet Automation Software and Services
Revenue:
Revenues	0	0
Operating Segments \| Maintenance Support and Training \| Global Services
Revenue:
Revenues	269,354	261,337	245,161
Operating Segments \| Installation and Deployment \| Networking Platforms
Revenue:
Revenues	0	0
Operating Segments \| Installation and Deployment \| Platform Software and Services
Revenue:
Revenues	0	0
Operating Segments \| Installation and Deployment \| Blue Planet Automation Software and Services
Revenue:
Revenues	0	0
Operating Segments \| Installation and Deployment \| Global Services
Revenue:
Revenues	152,003	148,233	128,829
Operating Segments \| Consulting and Network Design \| Networking Platforms
Revenue:
Revenues	0	0
Operating Segments \| Consulting and Network Design \| Platform Software and Services
Revenue:
Revenues	0	0
Operating Segments \| Consulting and Network Design \| Blue Planet Automation Software and Services
Revenue:
Revenues	0	0
Operating Segments \| Consulting and Network Design \| Global Services
Revenue:
Revenues	$ 35,296	$ 41,312	$ 41,565

Segment and Entity Wide Disclosures - Entity Wide Reporting (Details) $ in Thousands	12 Months Ended
	Oct. 31, 2020 USD ($) region	Nov. 02, 2019 USD ($)	Nov. 03, 2018 USD ($)
Revenues from External Customers and Long-Lived Assets [Line Items]
Number of geographic regions \| region	3
Ciena's geographic distribution of revenue
Revenues	$ 3,532,157	$ 3,572,131	$ 3,094,286
Ciena's geographic distribution of equipment, furniture and fixtures
Equipment, building, furniture and fixtures, net	329,403	286,884
Americas
Ciena's geographic distribution of revenue
Revenues	2,469,278	2,503,913	2,026,627
Canada
Ciena's geographic distribution of equipment, furniture and fixtures
Equipment, building, furniture and fixtures, net	214,188	211,901
United States
Ciena's geographic distribution of revenue
Revenues	2,250,000	2,250,000	1,770,000
Ciena's geographic distribution of equipment, furniture and fixtures
Equipment, building, furniture and fixtures, net	65,321	58,119
EMEA
Ciena's geographic distribution of revenue
Revenues	591,468	566,718	464,876
APAC
Ciena's geographic distribution of revenue
Revenues	471,411	501,500	$ 602,783
Other International
Ciena's geographic distribution of equipment, furniture and fixtures
Equipment, building, furniture and fixtures, net	$ 49,894	$ 16,864

Segment and Entity Wide Disclosures - Customer Concentration (Details) - USD ($) $ in Thousands	12 Months Ended
	Oct. 31, 2020	Nov. 02, 2019	Nov. 03, 2018
Revenue, Major Customer [Line Items]
Revenues	$ 3,532,157	$ 3,572,131	$ 3,094,286
Revenue
Revenue, Major Customer [Line Items]
Percent of revenue	54.50%	59.30%	56.50%
Customer Concentration Risk \| Revenue
Revenue, Major Customer [Line Items]
Revenues	$ 373,163	$ 1,219,068	$ 692,589
Customer Concentration Risk \| Revenue \| AT&T
Revenue, Major Customer [Line Items]
Revenues	$ 373,163	388,704	374,576
Customer Concentration Risk \| Revenue \| Verizon
Revenue, Major Customer [Line Items]
Revenues		459,787	$ 318,013
Customer Concentration Risk \| Revenue \| Web-scale provider
Revenue, Major Customer [Line Items]
Revenues		$ 370,577

- Definition

+ References

+ Details

Other Employee Benefit Plans (Details)	12 Months Ended
Other Employee Benefit Plans (Details)	Oct. 31, 2020 USD ($)	Oct. 31, 2020 CAD ($)	Nov. 02, 2019 USD ($)	Nov. 02, 2019 CAD ($)	Nov. 03, 2018 USD ($)	Nov. 03, 2018 CAD ($)
Defined Contribution Pension Plan Canada
Schedule of Defined Contribution Pension And Other Postretirement Plans Disclosure [Line Items]
Maximum total employee and employer contribution percentage	18.00%	18.00%
Maximum total employee and employer contribution amount	$ 20,895	$ 27,830
Required employer contribution percent	1.00%	1.00%
Employer matching percentage for eligible employee contribution	50.00%	50.00%
Percentage of employee contribution with employer matching contribution	6.00%	6.00%
Employer matching contributions	$ 5,300,000	$ 7,000,000.0	$ 3,900,000	$ 5,200,000	$ 3,800,000	$ 5,100,000
Defined Contribution Profit Sharing Plan
Schedule of Defined Contribution Pension And Other Postretirement Plans Disclosure [Line Items]
Employer matching percentage for eligible employee contribution	50.00%	50.00%
Percentage of employee contribution with employer matching contribution	8.00%	8.00%
Employer matching contributions	$ 7,500,000		$ 5,900,000		$ 5,800,000
Maximum employee contribution percentage of pre-tax compensation	60.00%	60.00%
Employer discretionary contribution amount	$ 0

Commitments and Contingencies (Details) $ in Thousands, $ in Millions	12 Months Ended				44 Months Ended
	Oct. 31, 2020 USD ($)	Oct. 31, 2020 CAD ($)	Nov. 02, 2019 USD ($)	Nov. 03, 2018 USD ($) government_entity	Oct. 31, 2020 USD ($)	Oct. 31, 2020 CAD ($)	Oct. 31, 2020 CAD ($)	Nov. 03, 2018 CAD ($)
Disaggregation of Revenue [Line Items]
Maximum amount of Canadian grant				$ 43,200				$ 57.6
Number of Canadian government entities \| government_entity				3
Total revenue \| $	$ 3,532,157		$ 3,572,131	$ 3,094,286
Amounts receivable from grant	3,900				$ 3,900		$ 5.1
Grant
Disaggregation of Revenue [Line Items]
Total revenue	$ 8,700	$ 11.7			$ 30,500	$ 40.6

- Definition

+ References

+ Details