0000936395-21-000010 | 10-Q | XBRL Viewer

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Cover Page - shares	3 Months Ended
Cover Page - shares	Jan. 30, 2021	Mar. 05, 2021
Cover [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Jan. 30, 2021
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 Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		155,003,312
Entity Central Index Key	0000936395
Current Fiscal Year End Date	--10-30
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	Q1
Amendment Flag	false

Condensed Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Jan. 30, 2021	Feb. 01, 2020
Revenue:
Total revenue	$ 757,130	$ 832,912
Cost of goods sold:
Total cost of goods sold	399,239	462,377
Gross profit	357,891	370,535
Operating expenses:
Research and development	132,741	130,900
Selling and marketing	97,278	107,066
General and administrative	39,993	42,468
Amortization of intangible assets	5,910	5,853
Significant asset impairments and restructuring costs	5,867	4,472
Acquisition and integration costs	307	1,819
Total operating expenses	282,096	292,578
Income from operations	75,795	77,957
Interest and other income (loss), net	(1,121)	3,646
Interest expense	(7,360)	(8,815)
Loss on extinguishment and modification of debt	0	(646)
Income before income taxes	67,314	72,142
Provision for income taxes	11,966	9,814
Net income	$ 55,348	$ 62,328
Basic net income per common share (in dollars per share)	$ 0.36	$ 0.40
Diluted net income per potential common share (in dollars per share)	$ 0.35	$ 0.40
Weighted average basic common shares outstanding (in shares)	155,174	154,334
Weighted average dilutive potential common shares outstanding (in shares)	156,583	155,738
Products
Revenue:
Total revenue	$ 597,220	$ 687,215
Cost of goods sold:
Total cost of goods sold	315,098	389,013
Services
Revenue:
Total revenue	159,910	145,697
Cost of goods sold:
Total cost of goods sold	$ 84,141	$ 73,364

Condensed Consolidated Statements of Comprehensive Income Gain (Loss) - USD ($) $ in Thousands	3 Months Ended
	Jan. 30, 2021	Feb. 01, 2020
Net income	$ 55,348	$ 62,328
Change in unrealized loss on available-for-sale securities, net of tax	(49)	(86)
Change in cumulative translation adjustments	15,861	(2,982)
Other comprehensive gain (loss)	23,811	(5,627)
Total comprehensive income	79,159	56,701
Change in unrealized gain (loss) on foreign currency forward contracts, net of tax
Change in unrealized gain (loss) on foreign currency forward contracts and forward starting interest rate swaps, net of tax	6,617	(1,079)
Change in unrealized gain (loss) on forward starting interest rate swaps, net of tax
Change in unrealized gain (loss) on foreign currency forward contracts and forward starting interest rate swaps, net of tax	$ 1,382	$ (1,480)

- 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

Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Jan. 30, 2021	Oct. 31, 2020
Current assets:
Cash and cash equivalents	$ 1,029,237	$ 1,088,624
Short-term investments	151,434	150,667
Accounts receivable, net of allowance for credit losses of $11.1 million and $10.6 million as of January 30, 2021 and October 31, 2020, respectively.	700,025	719,405
Inventories, net	389,733	344,379
Prepaid expenses and other	326,110	308,084
Total current assets	2,596,539	2,611,159
Long-term investments	102,364	82,226
Equipment, building, furniture and fixtures, net	281,228	272,377
Operating right-of-use assets	54,244	57,026
Goodwill	311,294	310,847
Other intangible assets, net	91,516	96,647
Deferred tax asset, net	647,232	647,805
Other long-term assets	102,480	102,830
Total assets	4,186,897	4,180,917
Current liabilities:
Accounts payable	247,241	291,904
Accrued liabilities and other short-term obligations	275,003	334,132
Deferred revenue	136,229	108,700
Operating lease liabilities	19,364	19,035
Current portion of long-term debt	6,930	6,930
Total current liabilities	684,767	760,701
Long-term deferred revenue	54,371	49,663
Other long-term obligations	128,764	123,185
Long-term operating lease liabilities	57,626	61,415
Long-term debt, net	674,856	676,356
Total liabilities	1,600,384	1,671,320
Commitments and contingencies (Note 20)
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; 155,187,945 and 154,563,005 shares issued and outstanding	1,552	1,546
Additional paid-in capital	6,826,488	6,826,531
Accumulated other comprehensive loss	(11,547)	(35,358)
Accumulated deficit	(4,229,980)	(4,283,122)
Total stockholders’ equity	2,586,513	2,509,597
Total liabilities and stockholders’ equity	$ 4,186,897	$ 4,180,917

Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Millions	Jan. 30, 2021	Oct. 31, 2020
Statement of Financial Position [Abstract]
Allowance for doubtful accounts	$ 11.1	$ 10.6
Stockholders’ equity:
Preferred stock par value per share (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 per share (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)	155,187,945	154,563,005
Common stock shares outstanding (in shares)	155,187,945	154,563,005

Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Jan. 30, 2021	Feb. 01, 2020
Cash flows provided by (used in) operating activities:
Net income	$ 55,348	$ 62,328
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Depreciation of equipment, building, furniture and fixtures, and amortization of leasehold improvements	23,188	25,782
Share-based compensation costs	18,964	15,602
Amortization of intangible assets	9,642	9,687
Deferred taxes	(905)	10,788
Provision for inventory excess and obsolescence	5,905	6,699
Provision for warranty	3,239	7,898
Other	4,277	4,540
Changes in assets and liabilities:
Accounts receivable	18,862	64,938
Inventories	(51,020)	(4,481)
Prepaid expenses and other	(13,835)	(29,792)
Operating lease right-of-use assets	4,103	4,176
Accounts payable, accruals and other obligations	(112,170)	(142,229)
Deferred revenue	31,917	8,926
Short- and long-term operating lease liabilities	(4,834)	(5,098)
Net cash provided by (used in) operating activities	(7,319)	39,764
Cash flows used in investing activities:
Payments for equipment, furniture, fixtures and intellectual property	(20,868)	(26,820)
Purchase of available for sale securities	(71,756)	(29,733)
Proceeds from maturities of available for sale securities	51,266	30,000
Settlement of foreign currency forward contracts, net	2,357	(73)
Acquisition of business, net of cash acquired	0	(28,300)
Proceeds from sale of equity investment	4,678	0
Net cash used in investing activities	(34,323)	(54,926)
Cash flows used in financing activities:
Payment of long-term debt	(1,732)	0
Payment of debt issuance costs	0	(382)
Payment of finance lease obligations	(702)	(722)
Shares repurchased for tax withholdings on vesting of stock unit awards	(19,242)	(12,572)
Repurchases of common stock - repurchase program	(12,406)	(49,203)
Proceeds from issuance of common stock	13,447	11,862
Net cash used in financing activities	(20,635)	(51,017)
Effect of exchange rate changes on cash, cash equivalents and restricted cash	2,879	(643)
Net decrease in cash, cash equivalents and restricted cash	(59,398)	(66,822)
Cash, cash equivalents and restricted cash at beginning of period	1,088,708	904,161
Cash, cash equivalents and restricted cash at end of period	1,029,310	837,339
Supplemental disclosure of cash flow information
Cash paid during the period for interest	7,566	9,325
Cash paid during the period for income taxes, net	8,798	8,325
Operating lease payments	5,387	5,642
Non-cash investing and financing activities
Purchase of equipment in accounts payable	5,935	5,905
Repurchase of common stock in accrued liabilities from repurchase program	800	1,501
Operating lease right-of-use assets subject to lease liability	$ 555	$ 1,157

Condensed Consolidated Statements of Changes in Stockholders’ Equity - USD ($) $ in Thousands	Total	Cumulative Effect, Period of Adoption, Adjustment	Common Stock	Additional Paid-in-Capital	Accumulated Other Comprehensive Loss	Accumulated Deficit	Accumulated Deficit Cumulative Effect, Period of Adoption, Adjustment
Beginning balance (in shares) at Nov. 02, 2019			154,403,850
Equity - beginning balance at Nov. 02, 2019	$ 2,172,761		$ 1,544	$ 6,837,714	$ (22,084)	$ (4,644,413)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	62,328					62,328
Other comprehensive loss	(5,627)				(5,627)
Repurchase of common stock - repurchase program (in shares)			(1,288,111)
Repurchase of common stock - repurchase program	(50,704)		$ (13)	(50,691)
Issuance of shares from employee equity plans (in shares)			1,128,096
Issuance of shares from employee equity plans	11,862		$ 11	11,851
Share-based compensation expense	15,602			15,602
Shares repurchased for tax withholdings on vesting of stock unit awards (in shares)			(297,002)
Shares repurchased for tax withholdings on vesting of stock unit awards	(12,572)		$ (3)	(12,569)
Ending balance (in shares) at Feb. 01, 2020			153,946,833
Equity- ending balance at Feb. 01, 2020	$ 2,193,650		$ 1,539	6,801,907	(27,711)	(4,582,085)
Beginning balance (in shares) at Oct. 31, 2020	154,563,005		154,563,005
Equity - beginning balance at Oct. 31, 2020	$ 2,509,597	$ (2,206)	$ 1,546	6,826,531	(35,358)	(4,283,122)	$ (2,206)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	55,348					55,348
Other comprehensive loss	23,811				23,811
Repurchase of common stock - repurchase program (in shares)			(251,578)
Repurchase of common stock - repurchase program	(13,206)		$ (3)	(13,203)
Issuance of shares from employee equity plans (in shares)			1,252,120
Issuance of shares from employee equity plans	13,447		$ 12	13,435
Share-based compensation expense	18,964			18,964
Shares repurchased for tax withholdings on vesting of stock unit awards (in shares)			(375,602)
Shares repurchased for tax withholdings on vesting of stock unit awards	$ (19,242)		$ (3)	(19,239)
Accounting Standards Update [Extensible List]	us-gaap:AccountingStandardsUpdate201613Member
Ending balance (in shares) at Jan. 30, 2021	155,187,945		155,187,945
Equity- ending balance at Jan. 30, 2021	$ 2,586,513		$ 1,552	$ 6,826,488	$ (11,547)	$ (4,229,980)

Interim Financial Statements	3 Months Ended
Interim Financial Statements	Jan. 30, 2021
Quarterly Financial Data [Abstract]
Interim Financial Statements	INTERIM FINANCIAL STATEMENTS The interim financial statements included herein for Ciena Corporation and its wholly owned subsidiaries (“Ciena”) have been prepared by Ciena, without audit, pursuant to the rules and regulations of the U.S. Securities and Exchange Commission (the “SEC”). The preparation of financial statements and related disclosures in conformity with accounting principles generally accepted in the United States of America (“GAAP”) requires Ciena to make judgments, assumptions, and estimates that affect the amounts reported in the Condensed Consolidated Financial Statements and accompanying notes. The inputs into certain of Ciena’s judgments, assumptions, and estimates reflect, among other things, the information available to Ciena regarding the economic implications of the COVID-19 pandemic, and expectations as to its impact on Ciena’s business. Among other things, these estimates form the basis for judgments about the carrying values of assets and liabilities that are not readily apparent from other sources. Actual results may differ materially from these estimates under different assumptions or conditions. To the extent that there are material differences between Ciena’s estimates and actual results, Ciena’s consolidated financial statements will be affected. In addition, including because the duration and severity of COVID-19 pandemic are uncertain, certain of such estimates could require further judgment or modification and therefore carry a higher degree of variability and volatility. As events continue to evolve, Ciena’s estimates may change materially in future periods. In the opinion of management, the financial statements included in this report reflect all normal recurring adjustments that Ciena considers necessary for the fair statement of the results of operations of Ciena for the interim periods covered and of the financial position of Ciena at the date of the interim balance sheets. Certain information and footnote disclosures normally included in the annual financial statements prepared in accordance with GAAP have been condensed or omitted pursuant to SEC rules and regulations. The Condensed Consolidated Balance Sheet as of October 31, 2020 was derived from audited financial statements, but does not include all disclosures required by GAAP. However, Ciena believes that the disclosures are adequate to understand the information presented herein. The operating results for interim periods are not necessarily indicative of the operating results for the entire year. These financial statements should be read in conjunction with Ciena’s audited consolidated financial statements and the notes thereto included in Ciena’s annual report on Form 10-K for fiscal 2020 (the “2020 Annual Report”). Ciena has a 52 or 53-week fiscal year, with quarters ending on the Saturday nearest to the last day of January, April, July and October, respectively, of each year. Fiscal 2021 and 2020 are 52-week fiscal years.

Significant Accounting Policies	3 Months Ended
Significant Accounting Policies	Jan. 30, 2021
Accounting Policies [Abstract]
Significant Accounting Policies	SIGNIFICANT ACCOUNTING POLICIES Except for the changes in certain policies described below, there have been no material changes to Ciena’s significant accounting policies, compared to the accounting policies described in Note 1, Ciena Corporation and Significant Accounting Policies and Estimates, in Notes to Consolidated Financial Statements in Item 8 of Part II of the 2020 Annual Report. Newly Issued Accounting Standards - Effective In June 2016, the Financial Accounting Standards Board (”FASB”) issued Accounting Standards Update 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. Ciena adopted ASU 2016-13 on a modified retrospective basis in the first quarter of fiscal year 2021 through a cumulative-effect adjustment at the beginning of the period of adoption and did not restate prior periods. The standard primarily impacts the value of Ciena’s accounts receivable, net and contract assets, net. Adoption of ASU 2016-13 did not have a material effect on Ciena’s financial position or results of operations. Ciena’s significant accounting policies updated as a result of adopting this standard are as follows: Allowance for Credit Losses for Accounts Receivable and Contract Assets Ciena estimates its allowances for credit losses using relevant available information from internal and external sources, related to past events, current conditions and reasonable and supportable forecasts. Historical credit loss experience provides the basis for the estimation of expected credit losses. When assessing for credit losses, Ciena determines collectability by pooling assets with similar characteristics. The allowances for credit losses are each measured on a collective basis when similar risk characteristics exist. The allowances for credit losses are each measured by multiplying the exposure probability of default, the probability the asset will default within a given time frame, by the loss given default rate, the percentage of the asset not expected to be collected due to default, based on the pool of assets. Probability of default rates are published by third-party credit rating agencies. Adjustments to Ciena’s exposure probability may take into account including, but not limited to, various customer-specific factors, the potential sovereign risk of the geographic locations in which the customer is operating and macroeconomic conditions. These factors are updated regularly or when facts and circumstances indicate that an update is deemed necessary. Newly Issued Accounting Standards - Not Yet Effective In March 2020, the FASB issued ASU No. 2020-04 (“ASU 2020-04”), Reference Rate Reform (Topic 848): Facilitation of the Effects of Reference Rate Reform on Financial Reporting. ASU 2020-04 provides temporary optional guidance on contract modifications and hedging accounting to ease the financial reporting burdens of the expected market transition from the London Interbank Offered Rate (“LIBOR”) to alternative reference rates. In January 2021, the FASB issued ASU 2021-01, which refines the scope of Topic 848 and clarifies some of its guidance as part of the FASB’s monitoring of global reference rate activities. The new guidance was effective upon issuance, and Ciena is allowed to elect to apply the amendments prospectively through December 31, 2022. Ciena is currently evaluating the impact of this accounting standard update on its consolidated financial statements and related disclosures. In December 2019, the FASB issued ASU No. 2019-12 (“ASU 2019-12”), Income Taxes (ASC 740): Simplifying the Accounting for Income Taxes, which enhances and simplifies various aspects related to accounting for income taxes by removing certain exceptions to the general principles in ASC 740. The amendments also improve consistent application of and simplify U.S. GAAP for other areas of ASC 740 by clarifying and amending existing guidance. ASU 2019-12 is effective for Ciena beginning in the first quarter of fiscal year 2022, and early adoption is permitted. Most amendments within this standard are required to be applied on a prospective basis, while certain amendments must be applied on a retrospective or modified retrospective basis. Ciena is currently evaluating the impact of this accounting standard update on its consolidated financial statements and related disclosures.

Revenue

3 Months Ended

Jan. 30, 2021

Revenue from Contract with Customer [Abstract]

Revenue

REVENUE

Disaggregation 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 lines, resulting in different economic risk profiles for each line. Effective as of the beginning of fiscal 2021, Ciena renamed its “Packet Networking” product line to “Routing and Switching.” This change, affecting only the presentation of such information, was made on a prospective basis and does not impact comparability of previous financial results. References to prior reported “Packet Networking” product line have been changed to“Routing and Switching” for this product line reported herein.

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


	Quarter Ended January 30, 2021
	Networking Platforms		Platform Software and Services		Blue Planet Automation Software and Services		Global Services		Total
Product lines:
Converged Packet Optical	$	512,324	$	—	$	—	$	—	$	512,324
Routing and Switching	64,307		—		—		—		64,307
Platform Software and Services	—		49,839		—		—		49,839
Blue Planet Automation Software and Services	—		—		16,934		—		16,934
Maintenance Support and Training	—		—		—		67,630		67,630
Installation and Deployment	—		—		—		39,611		39,611
Consulting and Network Design	—		—		—		6,485		6,485
Total revenue by product line	$	576,631	$	49,839	$	16,934	$	113,726	$	757,130

Timing of revenue recognition:
Products and services at a point in time	$	576,631	$	16,062	$	5,173	$	1,857	$	599,723
Services transferred over time	—		33,777		11,761		111,869		157,407
Total revenue by timing of revenue recognition	$	576,631	$	49,839	$	16,934	$	113,726	$	757,130


	Quarter Ended February 1, 2020
	Networking Platforms		Platform Software and Services		Blue Planet Automation Software and Services		Global Services		Total
Product lines:
Converged Packet Optical	$	591,549	$	—	$	—	$	—	$	591,549
Routing and Switching	67,508		—		—		—		67,508
Platform Software and Services	—		51,888		—		—		51,888
Blue Planet Automation Software and Services	—		—		15,466		—		15,466
Maintenance Support and Training	—		—		—		61,793		61,793
Installation and Deployment	—		—		—		34,954		34,954
Consulting and Network Design	—		—		—		9,754		9,754
Total revenue by product line	$	659,057	$	51,888	$	15,466	$	106,501	$	832,912

Timing of revenue recognition:
Products and services at a point in time	$	659,057	$	13,114	$	3,736	$	4,197	$	680,104
Services transferred over time	—		38,774		11,730		102,304		152,808
Total revenue by timing of revenue recognition	$	659,057	$	51,888	$	15,466	$	106,501	$	832,912

Ciena reflects its sales geographically around the following markets: (i) Americas; (ii) Europe, Middle East and Africa (“EMEA”); and (iii) Asia Pacific, Japan and India (“APAC”). Americas includes activities in North America and South America. 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. 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):


	Quarter Ended
	January 30,		February 1,
	2021		2020
Geographic distribution:
Americas	$	496,611	$	574,004
EMEA	155,418		129,965
APAC	105,101		128,943
Total revenue by geographic distribution	$	757,130	$	832,912

Ciena’s revenue includes $439.4 million and $524.3 million of United States revenue for the first quarter of fiscal 2021 and 2020, respectively. No other country accounted for 10% or more of total revenue for the periods presented above.

For the first quarter of fiscal 2021, there were no customers that accounted for at least 10% of Ciena’s revenue. The table below shows the customers that accounted for at least 10% of Ciena’s revenue for the first quarter of fiscal 2020: (in thousands):


	Quarter Ended
	January 30,	February 1,
	2021	2020
AT&T	n/a	$	84,010
Verizon	n/a	114,548

Total	n/a	$	198,558


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

The customers identified above for the first quarter of fiscal 2020 purchased products and services from each of Ciena’s operating segments.

•Networking Platforms revenue reflects sales of Ciena’s Converged Packet Optical and Routing and Switching 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.

◦Routing and Switching - 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 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 Condensed Consolidated Statements of Operations. Operating system software and enhanced software features embedded in Ciena hardware are each 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 Condensed Consolidated Statements of Operations. Revenue from services portions of this segment is included in services revenue on the Condensed 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 operations support system (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 Condensed Consolidated Statements of Operations. Revenue from services portions of this segment is included in services revenue on the Condensed 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 revenue 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 Condensed 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 January 30, 2021		Balance at October 31, 2020
Accounts receivable, net	$	700,025	$	719,405
Contract assets for unbilled accounts receivable, net	$	85,461	$	85,843
Deferred revenue	$	190,600	$	158,363

Our contract assets represent unbilled accounts receivable, net 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 Condensed 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 $46.4 million and $49.0 million of revenue during the first three months of fiscal 2021 and 2020 that was included in the deferred revenue balance at October 31, 2020 and November 2, 2019, respectively. Revenue recognized due to changes in transaction price from performance obligations satisfied or partially satisfied in previous periods was immaterial during the three months ended January 30, 2021 and February 1, 2020.

Capitalized Contract Acquisition Costs

Capitalized contract acquisition costs consist of deferred sales commissions, were $15.7 million and $15.3 million as of January 30, 2021 and October 31, 2020, respectively, and were included in prepaid expenses and other and other long-term assets. The amortization expense associated with these costs was $5.5 million and $5.6 million during the first three months of fiscal 2021 and 2020, respectively, and was 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 January 30, 2021, the aggregate amount of RPO was $1.1 billion. As of January 30, 2021, Ciena expects approximately 80% 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

Restructuring Costs

3 Months Ended

Jan. 30, 2021

Restructuring and Related Activities [Abstract]

Restructuring Costs

RESTRUCTURING COSTS

Ciena has undertaken a number of restructuring activities intended to reduce expense and to 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 Condensed Consolidated Balance Sheets, for the three months ended January 30, 2021 (in thousands):


	Workforce reduction			Consolidation of excess facilities and other restructuring activities			Total
Balance at October 31, 2020	$	2,915		$	—		$	2,915
Charges	1,990		(1)	3,877		(2)	5,867

Cash payments	(2,994)			(3,877)			(6,871)
Balance at January 30, 2021	$	1,911		$	—		$	1,911
Current restructuring liabilities	$	1,911		$	—		$	1,911

(1) Reflects a global workforce reduction of 50 employees during the three months ended January 30, 2021 as part of a business optimization strategy to improve gross margin, constrain operating expense and redesign certain business processes.

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

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 Condensed Consolidated Balance Sheets for the three months ended February 1, 2020 (in thousands):


	Workforce reduction			Consolidation of excess facilities			Total
Balance at November 2, 2019	$	3,983		$	11,160		$	15,143
Charges	1,204		(1)	3,268		(2)	4,472

Adjustments related to ASC 842	—			(11,160)		(3)	(11,160)
Cash payments	(2,955)			(3,268)			(6,223)
Balance at February 1, 2020	$	2,232		$	—		$	2,232
Current restructuring liabilities	$	2,232		$	—		$	2,232

(1) Reflects a global workforce reduction of approximately 22 employees during the three months ended February 1, 2020 as part of a business optimization strategy to improve gross margin, constrain operating expense and redesign certain business processes.

(2) Primarily represents variable costs and imputed interest expense related to restructured facilities.

(3) Represents restructuring reserve liability recognized as a reduction to Operating right-of-use (“ROU”) assets, net in relation to adoption of ASC 842.

Interest and Other Income, Net

3 Months Ended

Jan. 30, 2021

Other Income and Expenses [Abstract]

Interest and Other Income, Net

INTEREST AND OTHER INCOME (LOSS), NETThe components of interest and other income (loss), net, are as follows (in thousands):


	Quarter Ended
	January 30,		February 1,
	2021		2020
Interest income	$	534	$	3,390

Gains on non-hedge designated foreign currency forward contracts	4,530		637
Foreign currency exchange losses	(6,918)		(771)

Other	733		390
Interest and other income (loss), net	$	(1,121)	$	3,646

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 local currencies as their functional currencies. Ciena recorded $6.9 million and $0.8 million in foreign currency exchange rate losses during the first three months of fiscal 2021 and 2020, respectively, 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, on the Condensed Consolidated Statements of Operations. From time to time, Ciena uses foreign currency forwards to hedge this type of balance sheet exposure. These forwards 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 Condensed Consolidated Statements of Operations. During the first three months of fiscal 2021 and 2020, respectively, Ciena recorded gains of $4.5 million and $0.6 million from non-hedge designated foreign currency forward contracts.

Income Taxes	3 Months Ended
Income Taxes	Jan. 30, 2021
Income Tax Disclosure [Abstract]
Income Taxes	INCOME TAXES On December 2, 2019, the U.S. Department of the Treasury released final regulations and proposed regulations under Section 59A of the Internal Revenue Code, the Base Erosion and Anti-Abuse Tax (“BEAT”). BEAT, which requires certain U.S. corporations to pay a minimum tax associated with deductible payments to non-U.S. related parties, was enacted as part of the Tax Cuts and Jobs Act (the “Tax Act”). Also, on December 2, 2019, the U.S. Department of the Treasury released final regulations that provide additional guidance with respect to the foreign tax credit regime under the Tax Act. The effective tax rate for the three months ended January 30, 2021 was higher than the effective tax rate for the three months ended February 1, 2020, primarily due to the BEAT reduction in fiscal 2020 and the effect of the final regulations released on December 2, 2019. 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 and changes in tax laws and business reorganizations. Ciena continues to monitor these items and will adopt strategies to address their impact as appropriate.

- 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

Short-Term and Long-Term Investments

3 Months Ended

Jan. 30, 2021

Investments, Debt and Equity Securities [Abstract]

Short-Term and Long-Term Investments

SHORT-TERM AND LONG-TERM INVESTMENTS

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


	January 30, 2021
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Estimated Fair Value
U.S. government obligations:
Included in short-term investments	$	151,420	$	14	$	—	$	151,434
Included in long-term investments	102,360		4		—		102,364
	$	253,780	$	18	$	—	$	253,798


	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

The following table summarizes the final legal maturities of debt investments at January 30, 2021 (in thousands):


	Amortized Cost		Estimated Fair Value
Less than one year	$	151,420	$	151,434
Due in 1-2 years	102,360		102,364
	$	253,780	$	253,798

Fair Value Measurements

3 Months Ended

Jan. 30, 2021

Fair Value Disclosures [Abstract]

Fair Value Measurements

FAIR VALUE MEASUREMENTS

As of the date indicated, the following table summarizes the assets and liabilities that are recorded at fair value on a recurring basis (in thousands):


	January 30, 2021
	Level 1		Level 2		Level 3		Total
Assets:
Money market funds	$	810,289	$	—	$	—	$	810,289
Bond mutual fund	50,348		—		—		50,348
Time deposits	35,014		—		—		35,014
Deferred compensation plan assets	10,669		—		—		10,669
U.S. government obligations	—		253,798		—		253,798

Foreign currency forward contracts	—		8,397		—		8,397

Total assets measured at fair value	$	906,320	$	262,195	$	—	$	1,168,515

Liabilities:
Foreign currency forward contracts	$	—	$	417	$	—	$	417
Forward starting interest rate swaps	—		26,248		—		26,248

Total liabilities measured at fair value	$	—	$	26,665	$	—	$	26,665


	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

As of the date indicated, the assets and liabilities above are presented on Ciena’s Condensed Consolidated Balance Sheets as follows (in thousands):


	January 30, 2021
	Level 1		Level 2		Level 3		Total
Assets:
Cash equivalents	$	895,651	$	—	$	—	$	895,651
Short-term investments	—		151,434		—		151,434
Prepaid expenses and other	—		8,397		—		8,397

Other long-term assets	10,669		102,364		—		113,033
Total assets measured at fair value	$	906,320	$	262,195	$	—	$	1,168,515

Liabilities:
Accrued liabilities and other short-term obligations	$	—	$	417	$	—	$	417
Other long-term obligations	—		26,248		—		26,248
Total liabilities measured at fair value	$	—	$	26,665	$	—	$	26,665


	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

Ciena did not have any transfers between Level 1 and Level 2 fair value measurements during the periods presented.

- 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

Inventories

3 Months Ended

Jan. 30, 2021

Inventory Disclosure [Abstract]

Inventories

INVENTORIES

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


	January 30, 2021		October 31, 2020
Raw materials	$	123,388	$	119,481
Work-in-process	11,353		13,738
Finished goods	257,048		210,050
Deferred cost of goods sold	38,920		40,747
Gross inventories	430,709		384,016
Provision for excess and obsolescence	(40,976)		(39,637)
Inventories, net	$	389,733	$	344,379

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 the first three months of fiscal 2021, Ciena recorded a provision for excess and obsolescence of $5.9 million, primarily related to a decrease in the forecasted demand for certain Networking Platforms products. Deductions from the provision for excess and obsolete inventory relate primarily to disposal activities.

Prepaid Expenses and Other

3 Months Ended

Jan. 30, 2021

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

Prepaid Expenses and Other

PREPAID EXPENSES AND OTHER

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


	January 30, 2021		October 31, 2020
Contract assets for unbilled accounts receivable, net	$	85,461	$	85,843
Prepaid expenses	76,462		70,647
Prepaid VAT and other taxes	73,767		72,838
Product demonstration equipment, net	44,707		44,793
Other non-trade receivables	26,099		21,981
Capitalized contract acquisition costs	10,712		11,296
Derivative assets	8,397		82
Deferred deployment expense	505		604

	$	326,110	$	308,084

Depreciation of product demonstration equipment was $2.6 million during the first three months of fiscal 2021 and $2.2 million during the first three months of fiscal 2020.

For further discussion on contract assets and capitalized contract acquisition costs, see Note 3 above.

Other Balance Sheet Details

3 Months Ended

Jan. 30, 2021

Balance Sheet Related Disclosures [Abstract]

Other Balance Sheet Details

OTHER BALANCE SHEET DETAILS

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


	January 30, 2021		October 31, 2020
Compensation, payroll related tax and benefits (1)	$	76,477	$	135,462
Warranty	48,184		49,868
Vacation	28,414		26,945



Finance lease obligations	3,011		2,836
Interest payable	605		672
Other	118,312		118,349
	$	275,003	$	334,132

(1) Reduction is primarily due to the timing of bonus payments to employees under Ciena’s annual cash incentive compensation plan.

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


	Beginning Balance		Current Period Provisions	Settlements	Ending Balance
Three Months Ended February 1, 2020	$	48,498	7,898	(5,206)	$	51,190
Three Months Ended January 30, 2021	$	49,868	3,239	(4,923)	$	48,184

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


	January 30, 2021		October 31, 2020
Products	$	15,374	$	17,534
Services	175,226		140,829
	190,600		158,363
Less current portion	(136,229)		(108,700)
Long-term deferred revenue	$	54,371	$	49,663

Derivative Instruments	3 Months Ended
Derivative Instruments	Jan. 30, 2021
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative Instruments	DERIVATIVE INSTRUMENTS Foreign Currency Derivatives Ciena conducts business globally in numerous currencies, thus is exposed to adverse movements in foreign currency exchange rates. To limit the exposure related to foreign currency changes, Ciena enters into foreign currency contracts. Ciena does not enter into such contracts for speculative purposes. As of January 30, 2021 and October 31, 2020, Ciena had forward contracts to hedge its foreign exchange exposure in order to reduce variability principally related to research and development activities. The notional amount of these contracts was approximately $248.3 million and $254.9 million as of January 30, 2021 and October 31, 2020, respectively. These foreign exchange contracts have maturities of 24 months or less and have been designated as cash flow hedges. As of January 30, 2021 and October 31, 2020, 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 $210.4 million and $212.0 million as of January 30, 2021 and October 31, 2020, respectively. 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 15 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 for $350.0 million of the 2025 Term Loan (as defined in Note 15 below) at 2.957% through September 2023. The total notional amount of interest rate swaps in effect was $350.0 million as of January 30, 2021 and October 31, 2020. 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 Note 5 and Note 8 above.

Accumulated Other Comprehensive Income

3 Months Ended

Jan. 30, 2021

Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]

Accumulated Other Comprehensive Income

ACCUMULATED OTHER COMPREHENSIVE INCOMEThe following table summarizes the changes in accumulated balances of other comprehensive income (“AOCI”), net of tax, for the three months ended January 30, 2021 (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 31, 2020	$	45	$	(219)	$	(21,535)	$	(13,649)	$	(35,358)
Other comprehensive gain (loss) before reclassifications	(49)		7,848		(659)		15,861		23,001
Amounts reclassified from AOCI	—		(1,231)		2,041		—		810
Balance at January 30, 2021	$	(4)	$	6,398	$	(20,153)	$	2,212	$	(11,547)

The following table summarizes the changes in AOCI, net of tax, for the three months ended February 1, 2020 (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 November 2, 2019	$	152	$	925	$	(13,686)	$	(9,475)	$	(22,084)
Other comprehensive loss before reclassifications	(86)		(921)		(1,718)		(2,982)		(5,707)
Amounts reclassified from AOCI	—		(158)		238		—		80
Balance at February 1, 2020	$	66	$	(154)	$	(15,166)	$	(12,457)	$	(27,711)

All amounts reclassified from AOCI related to settlement (gains) losses on foreign currency forward contracts designated as cash flow hedges impacted research and development expense on the Condensed 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 Condensed Consolidated Statements of Operations.

Leases

3 Months Ended

Jan. 30, 2021

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 11 years. Certain leases provide for options to extend up to 10 years and/or options to terminate within five years.

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


	Classification	As of January 30, 2021		As of October 31, 2020
Operating leases:
Operating ROU assets	Operating right-of-use assets	$	54,244	$	57,026
Operating lease liabilities	Operating lease liabilities and Long-term operating lease liabilities	76,990		80,450
Finance leases:
Buildings, gross	Equipment, building, furniture and fixtures, net	$	73,776	$	70,791
Less: accumulated depreciation	Equipment, building, furniture and fixtures, net	(19,764)		(17,837)
Buildings, net		$	54,012	$	52,954
Finance lease liabilities	Accrued liabilities and other short-term obligations and other long-term obligations	$	66,409	$	64,401

ROU assets that involve subleased or vacant space aggregate $4.7 million as of January 30, 2021. 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 Condensed Consolidated Statement of Operations were as follows (in thousands):


		Three Months Ended		Three Months Ended
	Classification	January 30, 2021		February 1, 2020
Operating lease costs	Operating expense	$	4,229	$	4,457
Finance lease cost:
Amortization of finance ROU asset	Operating expense	1,165		1,140
Interest on finance lease liabilities	Interest expense	1,221		1,244
Total finance lease cost		2,386		2,384
Non-capitalized lease cost	Operating expense	293		621
Variable lease cost(1)	Operating expense	1,599		1,311

Net lease cost(2)		$	8,507	$	8,773

(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 $2.3 million and $4.3 million for the three months ended January 30, 2021 and February 1, 2020, respectively, 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 January 30, 2021 were as follows (in thousands):


	Operating Leases		Finance Leases		Total
Remaining fiscal 2021	$	16,077	$	7,759	$	23,836
2022	19,112		8,215		27,327
2023	15,747		8,294		24,041
2024	13,237		8,310		21,547
2025	8,900		8,494		17,394
Thereafter	9,367		58,427		67,794
Total lease payments	82,440		99,499		181,939
Less: Imputed interest	(5,450)		(33,090)		(38,540)
Present value of lease liabilities	76,990		66,409		143,399
Less: Current portion of present value of minimum lease payments	(19,364)		(3,011)		(22,375)
Long-term portion of present value of minimum lease payments	$	57,626	$	63,398	$	121,024

The weighted average remaining lease terms and weighted average discount rates for operating and finance leases were as follows:


	As of January 30, 2021		As of October 31, 2020
Weighted-average remaining lease term in years:
Operating leases	4.68		4.87
Finance leases	11.46		11.71
Weighted-average discount rates:
Operating leases	2.82	%	2.82	%
Finance leases	7.56	%	7.56	%

Leases

LEASES

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


	Classification	As of January 30, 2021		As of October 31, 2020
Operating leases:
Operating ROU assets	Operating right-of-use assets	$	54,244	$	57,026
Operating lease liabilities	Operating lease liabilities and Long-term operating lease liabilities	76,990		80,450
Finance leases:
Buildings, gross	Equipment, building, furniture and fixtures, net	$	73,776	$	70,791
Less: accumulated depreciation	Equipment, building, furniture and fixtures, net	(19,764)		(17,837)
Buildings, net		$	54,012	$	52,954
Finance lease liabilities	Accrued liabilities and other short-term obligations and other long-term obligations	$	66,409	$	64,401

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


		Three Months Ended		Three Months Ended
	Classification	January 30, 2021		February 1, 2020
Operating lease costs	Operating expense	$	4,229	$	4,457
Finance lease cost:
Amortization of finance ROU asset	Operating expense	1,165		1,140
Interest on finance lease liabilities	Interest expense	1,221		1,244
Total finance lease cost		2,386		2,384
Non-capitalized lease cost	Operating expense	293		621
Variable lease cost(1)	Operating expense	1,599		1,311

Net lease cost(2)		$	8,507	$	8,773

Future minimum lease payments and the present value of minimum lease payments related to operating and finance leases as of January 30, 2021 were as follows (in thousands):


	Operating Leases		Finance Leases		Total
Remaining fiscal 2021	$	16,077	$	7,759	$	23,836
2022	19,112		8,215		27,327
2023	15,747		8,294		24,041
2024	13,237		8,310		21,547
2025	8,900		8,494		17,394
Thereafter	9,367		58,427		67,794
Total lease payments	82,440		99,499		181,939
Less: Imputed interest	(5,450)		(33,090)		(38,540)
Present value of lease liabilities	76,990		66,409		143,399
Less: Current portion of present value of minimum lease payments	(19,364)		(3,011)		(22,375)
Long-term portion of present value of minimum lease payments	$	57,626	$	63,398	$	121,024

The weighted average remaining lease terms and weighted average discount rates for operating and finance leases were as follows:


	As of January 30, 2021		As of October 31, 2020
Weighted-average remaining lease term in years:
Operating leases	4.68		4.87
Finance leases	11.46		11.71
Weighted-average discount rates:
Operating leases	2.82	%	2.82	%
Finance leases	7.56	%	7.56	%

Short-Term and Long-Term Debt

3 Months Ended

Jan. 30, 2021

Debt Disclosure [Abstract]

Short-Term and Long-Term Debt

SHORT-TERM AND LONG-TERM DEBT

2025 Term Loan

On January 23, 2020, Ciena entered into a Refinancing Amendment to Credit Agreement pursuant to which Ciena refinanced the entire outstanding amount of its then existing senior secured term loan and incurred a new senior secured term loan in an aggregate principal amount of $693.0 million and maturing on September 28, 2025 (the “2025 Term Loan”).

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


	January 30, 2021								October 31, 2020
	Principal Balance		Unamortized Discount		Deferred Debt Issuance Costs		Net Carrying Value		Net Carrying Value
2025 Term Loan	$	686,070	$	(1,495)	$	(2,789)	$	681,786	$	683,286

Deferred debt issuance costs that were deducted from the carrying amounts of the term loan totaled $2.8 million at January 30, 2021 and $2.9 million at October 31, 2020. Deferred debt issuance costs are amortized using the straight-line method, which approximates the effect of the effective interest rate, 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 $0.2 million during the first three months of each of fiscal 2021 and fiscal 2020. The carrying value of the term loan listed above is also net of any unamortized debt discounts.

As of January 30, 2021, the estimated fair value of the 2025 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.

Earnings Per Share Calculation

3 Months Ended

Jan. 30, 2021

Earnings Per Share [Abstract]

Earnings Per Share Calculation

EARNINGS PER SHARE CALCULATION

The following tables (in thousands, except per share amounts) reconcile basic net income per common share (“Basic EPS”) and diluted net income per potential common share (“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.


	Quarter Ended
	January 30,		February 1,
Numerator	2021		2020




Net income used to calculate Basic and Diluted EPS	$	55,348	$	62,328


	Quarter Ended
	January 30,	February 1,
Denominator	2021	2020
Basic weighted average shares outstanding	155,174	154,334
Add: Shares underlying outstanding stock options and stock unit awards and issuable under employee stock purchase plan	1,409	1,404




Dilutive weighted average shares outstanding	156,583	155,738


	Quarter Ended
	January 30,		February 1,
EPS	2021		2020
Basic EPS	$	0.36	$	0.40
Diluted EPS	$	0.35	$	0.40

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 periods indicated (in thousands):


	Quarter Ended
	January 30,	February 1,
	2021	2020
Shares underlying stock options and stock unit awards	135	731
Total shares excluded due to anti-dilutive effect	135	731

Stockholders' Equity

3 Months Ended

Jan. 30, 2021

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. After temporarily suspending repurchases of Ciena’s common stock during fiscal 2020, Ciena reinstituted its stock repurchase program in the first quarter of 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.

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 October 31, 2020	5,710,912	$	39.33	$	224,611
Repurchase of common stock under the stock repurchase program	251,578	52.49		13,206
Cumulative balance at January 30, 2021	5,962,490	$	39.89	$	237,817

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 Stock Unit Award Tax Withholdings

Ciena repurchases shares of common stock to satisfy employee tax withholding obligations due on vesting of stock unit awards. The purchase price of $19.2 million for the shares of Ciena’s stock repurchased during the first three months of fiscal 2021 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.

Share-Based Compensation Expense

3 Months Ended

Jan. 30, 2021

Share-based Payment Arrangement [Abstract]

Share-Based Compensation Expense

SHARE-BASED COMPENSATION EXPENSE

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


	Quarter Ended
	January 30,		February 1,
	2021		2020
Product costs	$	953	$	671
Service costs	1,205		842
Share-based compensation expense included in cost of goods sold	2,158		1,513
Research and development	4,794		3,849
Sales and marketing	5,816		4,613
General and administrative	6,358		5,527

Share-based compensation expense included in operating expense	16,968		13,989
Share-based compensation expense capitalized in inventory, net	(162)		100
Total share-based compensation	$	18,964	$	15,602

As of January 30, 2021, total unrecognized share-based compensation expense was approximately $169.0 million, which relates to unvested stock unit awards and is expected to be recognized over a weighted-average period of 1.68 years.

Segments and Entity-Wide Disclosures

3 Months Ended

Jan. 30, 2021

Segment Reporting [Abstract]

Segments and Entity-Wide Disclosures

SEGMENTS 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.

Ciena's long-lived assets, including equipment, building, furniture and fixtures, ROU assets, finite-lived intangible assets and maintenance spares, are not reviewed by Ciena's chief operating decision maker for purposes of evaluating performance and allocating resources. As of January 30, 2021, equipment, building, furniture and fixtures, net, totaled $281.2 million, and operating ROU assets totaled $54.2 million both of which support asset groups within Ciena’s four operating segments and unallocated selling and general and administrative activities. As of January 30, 2021, finite-lived intangible assets, goodwill and maintenance spares are assigned to asset groups within the following segments (in thousands):


	January 30, 2021
	Networking Platforms		Platform Software and Services		Blue Planet Automation Software and Services		Global Services		Total

Other intangible assets, net	$	12,924	$	—	$	78,592	$	—	$	91,516
Goodwill	$	66,054	$	156,191	$	89,049	$	—	$	311,294
Maintenance spares, net	$	—	$	—	$	—	$	63,008	$	63,008

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 during the respective periods indicated (in thousands):


	Quarter Ended
	January 30,		February 1,
	2021		2020
Segment profit (loss):
Networking Platforms	$	156,431	$	168,270
Platform Software and Services	27,660		28,951
Blue Planet Automation Software and Services	(2,434)		(3,113)
Global Services	43,493		45,527
Total segment profit	225,150		239,635
Less: Non-performance operating expenses
Selling and marketing	97,278		107,066
General and administrative	39,993		42,468
Amortization of intangible assets	5,910		5,853
Significant asset impairments and restructuring costs	5,867		4,472
Acquisition and integration costs	307		1,819

Add: Other non-performance financial items
Interest expense and other income (loss), net	(8,481)		(5,169)
Loss on extinguishment and modification of debt	—		(646)
Less: Provision for income taxes	11,966		9,814
Consolidated net income	$	55,348	$	62,328

Entity-Wide Reporting

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 U.S. 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):


	January 30, 2021		October 31, 2020
Canada	$	226,331	$	214,188
United States	62,980		65,321
Other International	46,161		49,894
Total	$	335,472	$	329,403

- 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
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+ Details

Commitments and Contingencies	3 Months Ended
Commitments and Contingencies	Jan. 30, 2021
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	COMMITMENTS AND CONTINGENCIES Canadian 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 (“ENCQOR”) 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 $45.1 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 January 30, 2021, Ciena has recorded CAD$44.2 million (approximately $34.6 million) in cumulative benefits as a reduction in research and development expense of which CAD$3.6 million ($2.8 million) was recorded in the first three months of fiscal 2021. As of January 30, 2021, amounts receivable from this grant were CAD$3.2 million ($2.5 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	3 Months Ended
Subsequent Events	Jan. 30, 2021
Subsequent Events [Abstract]
Subsequent Events	SUBSEQUENT EVENTS Stock Repurchase Program From the end of the first quarter of fiscal 2021 through March 5, 2021, Ciena repurchased an additional 188,169 shares of its common stock, for an aggregate purchase price of $10.1 million at an average price of $53.69 per share, inclusive of repurchases pending settlement. As of March 5, 2021, Ciena has repurchased an aggregate of 6,150,659 shares and has an aggregate of $252.1 million of authorized funds remaining under its stock repurchase program.

Significant Accounting Policies (Policies)	3 Months Ended
Significant Accounting Policies (Policies)	Jan. 30, 2021
Accounting Policies [Abstract]
Newly Issued Accounting Standards - Effective and Not Yet Effective	Newly Issued Accounting Standards - Effective In June 2016, the Financial Accounting Standards Board (”FASB”) issued Accounting Standards Update 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. Ciena adopted ASU 2016-13 on a modified retrospective basis in the first quarter of fiscal year 2021 through a cumulative-effect adjustment at the beginning of the period of adoption and did not restate prior periods. The standard primarily impacts the value of Ciena’s accounts receivable, net and contract assets, net. Adoption of ASU 2016-13 did not have a material effect on Ciena’s financial position or results of operations. Ciena’s significant accounting policies updated as a result of adopting this standard are as follows: Allowance for Credit Losses for Accounts Receivable and Contract Assets Ciena estimates its allowances for credit losses using relevant available information from internal and external sources, related to past events, current conditions and reasonable and supportable forecasts. Historical credit loss experience provides the basis for the estimation of expected credit losses. When assessing for credit losses, Ciena determines collectability by pooling assets with similar characteristics. The allowances for credit losses are each measured on a collective basis when similar risk characteristics exist. The allowances for credit losses are each measured by multiplying the exposure probability of default, the probability the asset will default within a given time frame, by the loss given default rate, the percentage of the asset not expected to be collected due to default, based on the pool of assets. Probability of default rates are published by third-party credit rating agencies. Adjustments to Ciena’s exposure probability may take into account including, but not limited to, various customer-specific factors, the potential sovereign risk of the geographic locations in which the customer is operating and macroeconomic conditions. These factors are updated regularly or when facts and circumstances indicate that an update is deemed necessary. Newly Issued Accounting Standards - Not Yet Effective In March 2020, the FASB issued ASU No. 2020-04 (“ASU 2020-04”), Reference Rate Reform (Topic 848): Facilitation of the Effects of Reference Rate Reform on Financial Reporting. ASU 2020-04 provides temporary optional guidance on contract modifications and hedging accounting to ease the financial reporting burdens of the expected market transition from the London Interbank Offered Rate (“LIBOR”) to alternative reference rates. In January 2021, the FASB issued ASU 2021-01, which refines the scope of Topic 848 and clarifies some of its guidance as part of the FASB’s monitoring of global reference rate activities. The new guidance was effective upon issuance, and Ciena is allowed to elect to apply the amendments prospectively through December 31, 2022. Ciena is currently evaluating the impact of this accounting standard update on its consolidated financial statements and related disclosures. In December 2019, the FASB issued ASU No. 2019-12 (“ASU 2019-12”), Income Taxes (ASC 740): Simplifying the Accounting for Income Taxes, which enhances and simplifies various aspects related to accounting for income taxes by removing certain exceptions to the general principles in ASC 740. The amendments also improve consistent application of and simplify U.S. GAAP for other areas of ASC 740 by clarifying and amending existing guidance. ASU 2019-12 is effective for Ciena beginning in the first quarter of fiscal year 2022, and early adoption is permitted. Most amendments within this standard are required to be applied on a prospective basis, while certain amendments must be applied on a retrospective or modified retrospective basis. Ciena is currently evaluating the impact of this accounting standard update on its consolidated financial statements and related disclosures.

Revenue (Tables)

3 Months Ended

Jan. 30, 2021

Revenue from Contract with Customer [Abstract]

Disaggregation of Revenue

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


	Quarter Ended January 30, 2021
	Networking Platforms		Platform Software and Services		Blue Planet Automation Software and Services		Global Services		Total
Product lines:
Converged Packet Optical	$	512,324	$	—	$	—	$	—	$	512,324
Routing and Switching	64,307		—		—		—		64,307
Platform Software and Services	—		49,839		—		—		49,839
Blue Planet Automation Software and Services	—		—		16,934		—		16,934
Maintenance Support and Training	—		—		—		67,630		67,630
Installation and Deployment	—		—		—		39,611		39,611
Consulting and Network Design	—		—		—		6,485		6,485
Total revenue by product line	$	576,631	$	49,839	$	16,934	$	113,726	$	757,130

Timing of revenue recognition:
Products and services at a point in time	$	576,631	$	16,062	$	5,173	$	1,857	$	599,723
Services transferred over time	—		33,777		11,761		111,869		157,407
Total revenue by timing of revenue recognition	$	576,631	$	49,839	$	16,934	$	113,726	$	757,130


	Quarter Ended February 1, 2020
	Networking Platforms		Platform Software and Services		Blue Planet Automation Software and Services		Global Services		Total
Product lines:
Converged Packet Optical	$	591,549	$	—	$	—	$	—	$	591,549
Routing and Switching	67,508		—		—		—		67,508
Platform Software and Services	—		51,888		—		—		51,888
Blue Planet Automation Software and Services	—		—		15,466		—		15,466
Maintenance Support and Training	—		—		—		61,793		61,793
Installation and Deployment	—		—		—		34,954		34,954
Consulting and Network Design	—		—		—		9,754		9,754
Total revenue by product line	$	659,057	$	51,888	$	15,466	$	106,501	$	832,912

Timing of revenue recognition:
Products and services at a point in time	$	659,057	$	13,114	$	3,736	$	4,197	$	680,104
Services transferred over time	—		38,774		11,730		102,304		152,808
Total revenue by timing of revenue recognition	$	659,057	$	51,888	$	15,466	$	106,501	$	832,912

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


	Quarter Ended
	January 30,		February 1,
	2021		2020
Geographic distribution:
Americas	$	496,611	$	574,004
EMEA	155,418		129,965
APAC	105,101		128,943
Total revenue by geographic distribution	$	757,130	$	832,912


	Quarter Ended
	January 30,	February 1,
	2021	2020
AT&T	n/a	$	84,010
Verizon	n/a	114,548

Total	n/a	$	198,558


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

Contract Balances

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


	Balance at January 30, 2021		Balance at October 31, 2020
Accounts receivable, net	$	700,025	$	719,405
Contract assets for unbilled accounts receivable, net	$	85,461	$	85,843
Deferred revenue	$	190,600	$	158,363

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


	January 30, 2021		October 31, 2020
Products	$	15,374	$	17,534
Services	175,226		140,829
	190,600		158,363
Less current portion	(136,229)		(108,700)
Long-term deferred revenue	$	54,371	$	49,663

Restructuring Costs (Tables)

3 Months Ended

Jan. 30, 2021

Restructuring and Related Activities [Abstract]

Schedule of 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 Condensed Consolidated Balance Sheets, for the three months ended January 30, 2021 (in thousands):


	Workforce reduction			Consolidation of excess facilities and other restructuring activities			Total
Balance at October 31, 2020	$	2,915		$	—		$	2,915
Charges	1,990		(1)	3,877		(2)	5,867

Cash payments	(2,994)			(3,877)			(6,871)
Balance at January 30, 2021	$	1,911		$	—		$	1,911
Current restructuring liabilities	$	1,911		$	—		$	1,911

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


	Workforce reduction			Consolidation of excess facilities			Total
Balance at November 2, 2019	$	3,983		$	11,160		$	15,143
Charges	1,204		(1)	3,268		(2)	4,472

Adjustments related to ASC 842	—			(11,160)		(3)	(11,160)
Cash payments	(2,955)			(3,268)			(6,223)
Balance at February 1, 2020	$	2,232		$	—		$	2,232
Current restructuring liabilities	$	2,232		$	—		$	2,232

(2) Primarily represents variable costs and imputed interest expense related to restructured facilities.

(3) Represents restructuring reserve liability recognized as a reduction to Operating right-of-use (“ROU”) assets, net in relation to adoption of ASC 842.

Interest and Other Income, Net (Tables)

3 Months Ended

Jan. 30, 2021

Other Income and Expenses [Abstract]

Interest and Other Income, Net

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


	Quarter Ended
	January 30,		February 1,
	2021		2020
Interest income	$	534	$	3,390

Gains on non-hedge designated foreign currency forward contracts	4,530		637
Foreign currency exchange losses	(6,918)		(771)

Other	733		390
Interest and other income (loss), net	$	(1,121)	$	3,646

Short-Term and Long-Term Investments (Tables)

3 Months Ended

Jan. 30, 2021

Investments, Debt and Equity Securities [Abstract]

Schedule of Short-Term and Long-Term Investments

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


	January 30, 2021
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Estimated Fair Value
U.S. government obligations:
Included in short-term investments	$	151,420	$	14	$	—	$	151,434
Included in long-term investments	102,360		4		—		102,364
	$	253,780	$	18	$	—	$	253,798


	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

Schedule of Legal Maturities of Debt Investments

The following table summarizes the final legal maturities of debt investments at January 30, 2021 (in thousands):


	Amortized Cost		Estimated Fair Value
Less than one year	$	151,420	$	151,434
Due in 1-2 years	102,360		102,364
	$	253,780	$	253,798

Fair Value Measurements (Tables)

3 Months Ended

Jan. 30, 2021

Fair Value Disclosures [Abstract]

Schedule of the Fair Value of Assets and Liabilities Recorded on a Recurring Basis

As of the date indicated, the following table summarizes the assets and liabilities that are recorded at fair value on a recurring basis (in thousands):


	January 30, 2021
	Level 1		Level 2		Level 3		Total
Assets:
Money market funds	$	810,289	$	—	$	—	$	810,289
Bond mutual fund	50,348		—		—		50,348
Time deposits	35,014		—		—		35,014
Deferred compensation plan assets	10,669		—		—		10,669
U.S. government obligations	—		253,798		—		253,798

Foreign currency forward contracts	—		8,397		—		8,397

Total assets measured at fair value	$	906,320	$	262,195	$	—	$	1,168,515

Liabilities:
Foreign currency forward contracts	$	—	$	417	$	—	$	417
Forward starting interest rate swaps	—		26,248		—		26,248

Total liabilities measured at fair value	$	—	$	26,665	$	—	$	26,665


	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

Schedule of Assets and Liabilities as Presented on Ciena's Condensed Consolidated Balance Sheets

As of the date indicated, the assets and liabilities above are presented on Ciena’s Condensed Consolidated Balance Sheets as follows (in thousands):


	January 30, 2021
	Level 1		Level 2		Level 3		Total
Assets:
Cash equivalents	$	895,651	$	—	$	—	$	895,651
Short-term investments	—		151,434		—		151,434
Prepaid expenses and other	—		8,397		—		8,397

Other long-term assets	10,669		102,364		—		113,033
Total assets measured at fair value	$	906,320	$	262,195	$	—	$	1,168,515

Liabilities:
Accrued liabilities and other short-term obligations	$	—	$	417	$	—	$	417
Other long-term obligations	—		26,248		—		26,248
Total liabilities measured at fair value	$	—	$	26,665	$	—	$	26,665


	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

Inventories (Tables)

3 Months Ended

Jan. 30, 2021

Inventory Disclosure [Abstract]

Schedule of Inventories

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


	January 30, 2021		October 31, 2020
Raw materials	$	123,388	$	119,481
Work-in-process	11,353		13,738
Finished goods	257,048		210,050
Deferred cost of goods sold	38,920		40,747
Gross inventories	430,709		384,016
Provision for excess and obsolescence	(40,976)		(39,637)
Inventories, net	$	389,733	$	344,379

Prepaid Expenses and Other (Tables)

3 Months Ended

Jan. 30, 2021

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):


	January 30, 2021		October 31, 2020
Contract assets for unbilled accounts receivable, net	$	85,461	$	85,843
Prepaid expenses	76,462		70,647
Prepaid VAT and other taxes	73,767		72,838
Product demonstration equipment, net	44,707		44,793
Other non-trade receivables	26,099		21,981
Capitalized contract acquisition costs	10,712		11,296
Derivative assets	8,397		82
Deferred deployment expense	505		604

	$	326,110	$	308,084

Other Balance Sheet Details (Tables)

3 Months Ended

Jan. 30, 2021

Balance Sheet Related Disclosures [Abstract]

Schedule of Accrued Liabilities

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


	January 30, 2021		October 31, 2020
Compensation, payroll related tax and benefits (1)	$	76,477	$	135,462
Warranty	48,184		49,868
Vacation	28,414		26,945



Finance lease obligations	3,011		2,836
Interest payable	605		672
Other	118,312		118,349
	$	275,003	$	334,132

(1) Reduction is primarily due to the timing of bonus payments to employees under Ciena’s annual cash incentive compensation plan.

Schedule of Accrued Warranties

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


	Beginning Balance		Current Period Provisions	Settlements	Ending Balance
Three Months Ended February 1, 2020	$	48,498	7,898	(5,206)	$	51,190
Three Months Ended January 30, 2021	$	49,868	3,239	(4,923)	$	48,184

Contract Balances

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


	Balance at January 30, 2021		Balance at October 31, 2020
Accounts receivable, net	$	700,025	$	719,405
Contract assets for unbilled accounts receivable, net	$	85,461	$	85,843
Deferred revenue	$	190,600	$	158,363

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


	January 30, 2021		October 31, 2020
Products	$	15,374	$	17,534
Services	175,226		140,829
	190,600		158,363
Less current portion	(136,229)		(108,700)
Long-term deferred revenue	$	54,371	$	49,663

Accumulated Other Comprehensive Income (Tables)

3 Months Ended

Jan. 30, 2021

Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]

Schedule of Accumulated Other Comprehensive Income

The following table summarizes the changes in accumulated balances of other comprehensive income (“AOCI”), net of tax, for the three months ended January 30, 2021 (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 31, 2020	$	45	$	(219)	$	(21,535)	$	(13,649)	$	(35,358)
Other comprehensive gain (loss) before reclassifications	(49)		7,848		(659)		15,861		23,001
Amounts reclassified from AOCI	—		(1,231)		2,041		—		810
Balance at January 30, 2021	$	(4)	$	6,398	$	(20,153)	$	2,212	$	(11,547)

The following table summarizes the changes in AOCI, net of tax, for the three months ended February 1, 2020 (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 November 2, 2019	$	152	$	925	$	(13,686)	$	(9,475)	$	(22,084)
Other comprehensive loss before reclassifications	(86)		(921)		(1,718)		(2,982)		(5,707)
Amounts reclassified from AOCI	—		(158)		238		—		80
Balance at February 1, 2020	$	66	$	(154)	$	(15,166)	$	(12,457)	$	(27,711)

Leases (Tables)

3 Months Ended

Jan. 30, 2021

Leases [Abstract]

Leases Included in the Balance Sheet

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


	Classification	As of January 30, 2021		As of October 31, 2020
Operating leases:
Operating ROU assets	Operating right-of-use assets	$	54,244	$	57,026
Operating lease liabilities	Operating lease liabilities and Long-term operating lease liabilities	76,990		80,450
Finance leases:
Buildings, gross	Equipment, building, furniture and fixtures, net	$	73,776	$	70,791
Less: accumulated depreciation	Equipment, building, furniture and fixtures, net	(19,764)		(17,837)
Buildings, net		$	54,012	$	52,954
Finance lease liabilities	Accrued liabilities and other short-term obligations and other long-term obligations	$	66,409	$	64,401

The weighted average remaining lease terms and weighted average discount rates for operating and finance leases were as follows:


	As of January 30, 2021		As of October 31, 2020
Weighted-average remaining lease term in years:
Operating leases	4.68		4.87
Finance leases	11.46		11.71
Weighted-average discount rates:
Operating leases	2.82	%	2.82	%
Finance leases	7.56	%	7.56	%

Components of Lease Expense

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


		Three Months Ended		Three Months Ended
	Classification	January 30, 2021		February 1, 2020
Operating lease costs	Operating expense	$	4,229	$	4,457
Finance lease cost:
Amortization of finance ROU asset	Operating expense	1,165		1,140
Interest on finance lease liabilities	Interest expense	1,221		1,244
Total finance lease cost		2,386		2,384
Non-capitalized lease cost	Operating expense	293		621
Variable lease cost(1)	Operating expense	1,599		1,311

Net lease cost(2)		$	8,507	$	8,773

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 January 30, 2021 were as follows (in thousands):


	Operating Leases		Finance Leases		Total
Remaining fiscal 2021	$	16,077	$	7,759	$	23,836
2022	19,112		8,215		27,327
2023	15,747		8,294		24,041
2024	13,237		8,310		21,547
2025	8,900		8,494		17,394
Thereafter	9,367		58,427		67,794
Total lease payments	82,440		99,499		181,939
Less: Imputed interest	(5,450)		(33,090)		(38,540)
Present value of lease liabilities	76,990		66,409		143,399
Less: Current portion of present value of minimum lease payments	(19,364)		(3,011)		(22,375)
Long-term portion of present value of minimum lease payments	$	57,626	$	63,398	$	121,024

Finance Lease, Liability, Maturity

Future minimum lease payments and the present value of minimum lease payments related to operating and finance leases as of January 30, 2021 were as follows (in thousands):


	Operating Leases		Finance Leases		Total
Remaining fiscal 2021	$	16,077	$	7,759	$	23,836
2022	19,112		8,215		27,327
2023	15,747		8,294		24,041
2024	13,237		8,310		21,547
2025	8,900		8,494		17,394
Thereafter	9,367		58,427		67,794
Total lease payments	82,440		99,499		181,939
Less: Imputed interest	(5,450)		(33,090)		(38,540)
Present value of lease liabilities	76,990		66,409		143,399
Less: Current portion of present value of minimum lease payments	(19,364)		(3,011)		(22,375)
Long-term portion of present value of minimum lease payments	$	57,626	$	63,398	$	121,024

Short-Term and Long-Term Debt (Tables)

3 Months Ended

Jan. 30, 2021

Debt Disclosure [Abstract]

Schedule of Carrying Values and Estimated Fair Values of Convertible Notes

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


	January 30, 2021								October 31, 2020
	Principal Balance		Unamortized Discount		Deferred Debt Issuance Costs		Net Carrying Value		Net Carrying Value
2025 Term Loan	$	686,070	$	(1,495)	$	(2,789)	$	681,786	$	683,286

Earnings Per Share Calculation (Tables)

3 Months Ended

Jan. 30, 2021

Earnings Per Share [Abstract]

Schedule of Reconciliation of Numerator and Denominator of Basic and Diluted Earnings Per Share


	Quarter Ended
	January 30,		February 1,
Numerator	2021		2020




Net income used to calculate Basic and Diluted EPS	$	55,348	$	62,328


	Quarter Ended
	January 30,	February 1,
Denominator	2021	2020
Basic weighted average shares outstanding	155,174	154,334
Add: Shares underlying outstanding stock options and stock unit awards and issuable under employee stock purchase plan	1,409	1,404




Dilutive weighted average shares outstanding	156,583	155,738


	Quarter Ended
	January 30,		February 1,
EPS	2021		2020
Basic EPS	$	0.36	$	0.40
Diluted EPS	$	0.35	$	0.40

Schedule of Weighted Average Shares Excluded From Calculation of Denominator for Basic and Diluted EPS

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 periods indicated (in thousands):


	Quarter Ended
	January 30,	February 1,
	2021	2020
Shares underlying stock options and stock unit awards	135	731
Total shares excluded due to anti-dilutive effect	135	731

Stockholders' Equity (Tables)

3 Months Ended

Jan. 30, 2021

Equity [Abstract]

Schedule 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 October 31, 2020	5,710,912	$	39.33	$	224,611
Repurchase of common stock under the stock repurchase program	251,578	52.49		13,206
Cumulative balance at January 30, 2021	5,962,490	$	39.89	$	237,817

Share-Based Compensation Expense (Tables)

3 Months Ended

Jan. 30, 2021

Share-based Payment Arrangement [Abstract]

Schedule of Share-Based Compensation Expense

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


	Quarter Ended
	January 30,		February 1,
	2021		2020
Product costs	$	953	$	671
Service costs	1,205		842
Share-based compensation expense included in cost of goods sold	2,158		1,513
Research and development	4,794		3,849
Sales and marketing	5,816		4,613
General and administrative	6,358		5,527

Share-based compensation expense included in operating expense	16,968		13,989
Share-based compensation expense capitalized in inventory, net	(162)		100
Total share-based compensation	$	18,964	$	15,602

Segments and Entity-Wide Disclosures (Tables)

3 Months Ended

Jan. 30, 2021

Segment Reporting [Abstract]

Reconciliation of Assets from Segment to Consolidated

As of January 30, 2021, finite-lived intangible assets, goodwill and maintenance spares are assigned to asset groups within the following segments (in thousands):


	January 30, 2021
	Networking Platforms		Platform Software and Services		Blue Planet Automation Software and Services		Global Services		Total

Other intangible assets, net	$	12,924	$	—	$	78,592	$	—	$	91,516
Goodwill	$	66,054	$	156,191	$	89,049	$	—	$	311,294
Maintenance spares, net	$	—	$	—	$	—	$	63,008	$	63,008

Schedule of 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 during the respective periods indicated (in thousands):


	Quarter Ended
	January 30,		February 1,
	2021		2020
Segment profit (loss):
Networking Platforms	$	156,431	$	168,270
Platform Software and Services	27,660		28,951
Blue Planet Automation Software and Services	(2,434)		(3,113)
Global Services	43,493		45,527
Total segment profit	225,150		239,635
Less: Non-performance operating expenses
Selling and marketing	97,278		107,066
General and administrative	39,993		42,468
Amortization of intangible assets	5,910		5,853
Significant asset impairments and restructuring costs	5,867		4,472
Acquisition and integration costs	307		1,819

Add: Other non-performance financial items
Interest expense and other income (loss), net	(8,481)		(5,169)
Loss on extinguishment and modification of debt	—		(646)
Less: Provision for income taxes	11,966		9,814
Consolidated net income	$	55,348	$	62,328

Schedule of Ciena's Geographic Distribution of Revenue and Long-Lived Assets

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


	January 30, 2021		October 31, 2020
Canada	$	226,331	$	214,188
United States	62,980		65,321
Other International	46,161		49,894
Total	$	335,472	$	329,403

Revenue - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended
	Jan. 30, 2021	Feb. 01, 2020
Disaggregation of Revenue [Line Items]
Total revenue	$ 757,130	$ 832,912
Products and services at a point in time
Disaggregation of Revenue [Line Items]
Total revenue	599,723	680,104
Services transferred over time
Disaggregation of Revenue [Line Items]
Total revenue	157,407	152,808
Converged Packet Optical
Disaggregation of Revenue [Line Items]
Total revenue	512,324	591,549
Routing and Switching
Disaggregation of Revenue [Line Items]
Total revenue	64,307	67,508
Platform Software and Services
Disaggregation of Revenue [Line Items]
Total revenue	49,839	51,888
Blue Planet Automation Software and Services
Disaggregation of Revenue [Line Items]
Total revenue	16,934	15,466
Maintenance Support and Training
Disaggregation of Revenue [Line Items]
Total revenue	67,630	61,793
Installation and Deployment
Disaggregation of Revenue [Line Items]
Total revenue	39,611	34,954
Consulting and Network Design
Disaggregation of Revenue [Line Items]
Total revenue	6,485	9,754
Networking Platforms
Disaggregation of Revenue [Line Items]
Total revenue	576,631	659,057
Networking Platforms \| Products and services at a point in time
Disaggregation of Revenue [Line Items]
Total revenue	576,631	659,057
Networking Platforms \| Services transferred over time
Disaggregation of Revenue [Line Items]
Total revenue	0	0
Networking Platforms \| Operating Segments
Disaggregation of Revenue [Line Items]
Total revenue	576,631	659,057
Networking Platforms \| Operating Segments \| Converged Packet Optical
Disaggregation of Revenue [Line Items]
Total revenue	512,324	591,549
Networking Platforms \| Operating Segments \| Routing and Switching
Disaggregation of Revenue [Line Items]
Total revenue	64,307	67,508
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
Disaggregation of Revenue [Line Items]
Total revenue	49,839	51,888
Platform Software and Services \| Products and services at a point in time
Disaggregation of Revenue [Line Items]
Total revenue	16,062	13,114
Platform Software and Services \| Services transferred over time
Disaggregation of Revenue [Line Items]
Total revenue	33,777	38,774
Platform Software and Services \| Operating Segments
Disaggregation of Revenue [Line Items]
Total revenue	49,839	51,888
Platform Software and Services \| Operating Segments \| Converged Packet Optical
Disaggregation of Revenue [Line Items]
Total revenue	0	0
Platform Software and Services \| Operating Segments \| Routing and Switching
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	49,839	51,888
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
Disaggregation of Revenue [Line Items]
Total revenue	16,934	15,466
Blue Planet Automation Software and Services \| Products and services at a point in time
Disaggregation of Revenue [Line Items]
Total revenue	5,173	3,736
Blue Planet Automation Software and Services \| Services transferred over time
Disaggregation of Revenue [Line Items]
Total revenue	11,761	11,730
Blue Planet Automation Software and Services \| Operating Segments
Disaggregation of Revenue [Line Items]
Total revenue	16,934	15,466
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 \| Routing and Switching
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	16,934	15,466
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
Disaggregation of Revenue [Line Items]
Total revenue	113,726	106,501
Global Services \| Products and services at a point in time
Disaggregation of Revenue [Line Items]
Total revenue	1,857	4,197
Global Services \| Services transferred over time
Disaggregation of Revenue [Line Items]
Total revenue	111,869	102,304
Global Services \| Operating Segments
Disaggregation of Revenue [Line Items]
Total revenue	113,726	106,501
Global Services \| Operating Segments \| Converged Packet Optical
Disaggregation of Revenue [Line Items]
Total revenue	0	0
Global Services \| Operating Segments \| Routing and Switching
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	67,630	61,793
Global Services \| Operating Segments \| Installation and Deployment
Disaggregation of Revenue [Line Items]
Total revenue	39,611	34,954
Global Services \| Operating Segments \| Consulting and Network Design
Disaggregation of Revenue [Line Items]
Total revenue	$ 6,485	$ 9,754

Revenue - Geographical Distribution of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended
	Jan. 30, 2021	Feb. 01, 2020
Disaggregation of Revenue [Line Items]
Total revenue	$ 757,130	$ 832,912
Americas
Disaggregation of Revenue [Line Items]
Total revenue	496,611	574,004
EMEA
Disaggregation of Revenue [Line Items]
Total revenue	155,418	129,965
APAC
Disaggregation of Revenue [Line Items]
Total revenue	105,101	128,943
United States
Disaggregation of Revenue [Line Items]
Total revenue	$ 439,400	$ 524,300

- 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
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-Name Accounting Standards Codification
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 323
-SubTopic 10
-Section 50
-Paragraph 3
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-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
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-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
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-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
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Reference 7: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
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Reference 8: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
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Reference 9: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
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Reference 10: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
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Reference 12: http://www.xbrl.org/2003/role/disclosureRef
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-Name Accounting Standards Codification
-Topic 942
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-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 - Revenue by Major Customers (Details) - USD ($) $ in Thousands	3 Months Ended
	Jan. 30, 2021	Feb. 01, 2020
Revenue, Major Customer [Line Items]
Total revenue	$ 757,130	$ 832,912
AT&T \| Customer concentration risk
Revenue, Major Customer [Line Items]
Total revenue		84,010
Verizon \| Customer concentration risk
Revenue, Major Customer [Line Items]
Total revenue		114,548
Total \| Customer concentration risk
Revenue, Major Customer [Line Items]
Total revenue		$ 198,558

- Definition

+ References

+ Details

Revenue - Contract Balances (Details) - USD ($) $ in Thousands	Jan. 30, 2021	Oct. 31, 2020
Revenue from Contract with Customer [Abstract]
Accounts receivable, net	$ 700,025	$ 719,405
Contract assets for unbilled accounts receivable, net	85,461	85,843
Deferred revenue	$ 190,600	$ 158,363

Revenue - Narrative (Details) - USD ($) $ in Millions	3 Months Ended
Revenue - Narrative (Details) - USD ($) $ in Millions	Jan. 30, 2021	Feb. 01, 2020	Oct. 31, 2020
Revenue from Contract with Customer [Abstract]
Revenue recognized that was previously deferred	$ 46.4	$ 49.0
Capitalized contract acquisition costs	15.7		$ 15.3
Amortization of capitalized contract acquisition costs	$ 5.5	$ 5.6

Revenue - Performance Obligation (Details) $ in Millions	Jan. 30, 2021 USD ($)
Revenue from Contract with Customer [Abstract]
Remaining performance obligation	$ 1,100.0
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-01-31
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Percentage of remaining performance obligation	80.00%
Period of remaining performance obligation	12 months

Restructuring Costs (Details) $ in Thousands	3 Months Ended
Restructuring Costs (Details) $ in Thousands	Jan. 30, 2021 USD ($) employee	Feb. 01, 2020 USD ($) employee
Activity and balance of the restructuring liability accounts
Balance at beginning of period	$ 2,915	$ 15,143
Charges	5,867	4,472
Cash payments	(6,871)	(6,223)
Balance at end of period	1,911	2,232
Current restructuring liabilities	1,911	2,232
Cumulative Effect, Period of Adoption, Adjustment
Activity and balance of the restructuring liability accounts
Balance at beginning of period		(11,160)
Workforce reduction
Activity and balance of the restructuring liability accounts
Balance at beginning of period	2,915	3,983
Charges	1,990	1,204
Cash payments	(2,994)	(2,955)
Balance at end of period	1,911	2,232
Current restructuring liabilities	$ 1,911	$ 2,232
Number of employee reduction \| employee	50	22
Workforce reduction \| Cumulative Effect, Period of Adoption, Adjustment
Activity and balance of the restructuring liability accounts
Balance at beginning of period		$ 0
Consolidation of excess facilities and other restructuring activities
Activity and balance of the restructuring liability accounts
Balance at beginning of period	$ 0	11,160
Charges	3,877	3,268
Cash payments	(3,877)	(3,268)
Balance at end of period	0	0
Current restructuring liabilities	$ 0	0
Consolidation of excess facilities and other restructuring activities \| Cumulative Effect, Period of Adoption, Adjustment
Activity and balance of the restructuring liability accounts
Balance at beginning of period		$ (11,160)

Interest and Other Income, Net (Details) - USD ($) $ in Thousands	3 Months Ended
	Jan. 30, 2021	Feb. 01, 2020
Other Income and Expenses [Abstract]
Interest income	$ 534	$ 3,390
Gains on non-hedge designated foreign currency forward contracts	4,530	637
Foreign currency exchange losses	(6,918)	(771)
Other	733	390
Interest and other income (loss), net	$ (1,121)	$ 3,646

Short-Term and Long-Term Investments - Components of Investments (Details) - USD ($) $ in Thousands	Jan. 30, 2021	Oct. 31, 2020
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	$ 253,780
Estimated Fair Value	253,798
U.S. government obligations
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	253,780	$ 232,811
Gross Unrealized Gains	18	109
Gross Unrealized Losses	0	(27)
Estimated Fair Value	253,798	232,893
Included in short-term investments \| U.S. government obligations
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	151,420	150,559
Gross Unrealized Gains	14	109
Gross Unrealized Losses	0	(1)
Estimated Fair Value	151,434	150,667
Included in long-term investments \| U.S. government obligations
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	102,360	82,252
Gross Unrealized Gains	4	0
Gross Unrealized Losses	0	(26)
Estimated Fair Value	$ 102,364	$ 82,226

Short-Term and Long-Term Investments - Legal Maturities of Debt Investments (Details) $ in Thousands	Jan. 30, 2021 USD ($)
Amortized Cost
Less than one year	$ 151,420
Due in 1-2 years	102,360
Amortized Cost	253,780
Estimated Fair Value
Less than one year	151,434
Due in 1-2 years	102,364
Estimated Fair Value	$ 253,798

Fair Value Measurements - Fair Value Measurements (Details) - USD ($) $ in Thousands	Jan. 30, 2021	Oct. 31, 2020
Assets:
Debt securities	$ 253,798
Fair value, Measurements, Recurring
Assets:
Deferred compensation plan assets	10,669	$ 8,213
Total assets measured at fair value	1,168,515	1,180,842
Liabilities:
Total liabilities measured at fair value	26,665	29,194
Fair value, Measurements, Recurring \| Money market funds
Assets:
Cash equivalents	810,289	889,293
Fair value, Measurements, Recurring \| Time deposits
Assets:
Cash equivalents	35,014
Fair value, Measurements, Recurring \| Level 1
Assets:
Deferred compensation plan assets	10,669	8,213
Total assets measured at fair value	906,320	947,867
Liabilities:
Total liabilities measured at fair value	0	0
Fair value, Measurements, Recurring \| Level 1 \| Money market funds
Assets:
Cash equivalents	810,289	889,293
Fair value, Measurements, Recurring \| Level 1 \| Time deposits
Assets:
Cash equivalents	35,014
Fair value, Measurements, Recurring \| Level 2
Assets:
Deferred compensation plan assets	0	0
Total assets measured at fair value	262,195	232,975
Liabilities:
Total liabilities measured at fair value	26,665	29,194
Fair value, Measurements, Recurring \| Level 2 \| Money market funds
Assets:
Cash equivalents	0	0
Fair value, Measurements, Recurring \| Level 2 \| Time deposits
Assets:
Cash equivalents	0
Fair value, Measurements, Recurring \| Level 3
Assets:
Deferred compensation plan assets	0	0
Total assets measured at fair value	0	0
Liabilities:
Total liabilities measured at fair value	0	0
Fair value, Measurements, Recurring \| Level 3 \| Money market funds
Assets:
Cash equivalents	0	0
Fair value, Measurements, Recurring \| Level 3 \| Time deposits
Assets:
Cash equivalents	0
Foreign Currency Forward Contracts \| Fair value, Measurements, Recurring
Assets:
Derivative asset	8,397	82
Liabilities:
Derivative liability	417	681
Foreign Currency Forward Contracts \| Fair value, Measurements, Recurring \| Level 1
Assets:
Derivative asset	0	0
Liabilities:
Derivative liability	0	0
Foreign Currency Forward Contracts \| Fair value, Measurements, Recurring \| Level 2
Assets:
Derivative asset	8,397	82
Liabilities:
Derivative liability	417	681
Foreign Currency Forward Contracts \| Fair value, Measurements, Recurring \| Level 3
Assets:
Derivative asset	0	0
Liabilities:
Derivative liability	0	0
Forward Starting Interest Rate Swaps
Liabilities:
Derivative liability		28,513
Forward Starting Interest Rate Swaps \| Fair value, Measurements, Recurring
Liabilities:
Derivative liability	26,248
Forward Starting Interest Rate Swaps \| Fair value, Measurements, Recurring \| Level 1
Liabilities:
Derivative liability	0	0
Forward Starting Interest Rate Swaps \| Fair value, Measurements, Recurring \| Level 2
Liabilities:
Derivative liability	26,248	28,513
Forward Starting Interest Rate Swaps \| Fair value, Measurements, Recurring \| Level 3
Liabilities:
Derivative liability	0	0
Bond mutual fund \| Fair value, Measurements, Recurring
Assets:
Debt securities	50,348	50,361
Bond mutual fund \| Fair value, Measurements, Recurring \| Level 1
Assets:
Debt securities	50,348	50,361
Bond mutual fund \| Fair value, Measurements, Recurring \| Level 2
Assets:
Debt securities	0	0
Bond mutual fund \| Fair value, Measurements, Recurring \| Level 3
Assets:
Debt securities	0	0
U.S. government obligations \| Fair value, Measurements, Recurring
Assets:
Debt securities	253,798	232,893
U.S. government obligations \| Fair value, Measurements, Recurring \| Level 1
Assets:
Debt securities	0	0
U.S. government obligations \| Fair value, Measurements, Recurring \| Level 2
Assets:
Debt securities	253,798	232,893
U.S. government obligations \| Fair value, Measurements, Recurring \| Level 3
Assets:
Debt securities	$ 0	$ 0

Fair Value Measurements - Condensed Consolidated Balance Sheet (Details) - Fair value, Measurements, Recurring - USD ($) $ in Thousands	Jan. 30, 2021	Oct. 31, 2020
Assets:
Total assets measured at fair value	$ 1,168,515	$ 1,180,842
Liabilities:
Total liabilities measured at fair value	26,665	29,194
Cash equivalents
Assets:
Cash equivalents	895,651	939,654
Short-term investments
Assets:
Short-term investments	151,434	150,667
Prepaid expenses and other
Assets:
Other assets	8,397	82
Other long-term assets
Assets:
Other assets	113,033	90,439
Accrued liabilities and other short-term obligations
Liabilities:
Accrued liabilities and other short-term obligations	417	681
Other long-term obligations
Liabilities:
Other long-term obligations	26,248	28,513
Level 1
Assets:
Total assets measured at fair value	906,320	947,867
Liabilities:
Total liabilities measured at fair value	0	0
Level 1 \| Cash equivalents
Assets:
Cash equivalents	895,651	939,654
Level 1 \| Short-term investments
Assets:
Short-term investments	0	0
Level 1 \| Prepaid expenses and other
Assets:
Other assets	0	0
Level 1 \| Other long-term assets
Assets:
Other assets	10,669	8,213
Level 1 \| Accrued liabilities and other short-term obligations
Liabilities:
Accrued liabilities and other short-term obligations	0	0
Level 1 \| Other long-term obligations
Liabilities:
Other long-term obligations	0	0
Level 2
Assets:
Total assets measured at fair value	262,195	232,975
Liabilities:
Total liabilities measured at fair value	26,665	29,194
Level 2 \| Cash equivalents
Assets:
Cash equivalents	0	0
Level 2 \| Short-term investments
Assets:
Short-term investments	151,434	150,667
Level 2 \| Prepaid expenses and other
Assets:
Other assets	8,397	82
Level 2 \| Other long-term assets
Assets:
Other assets	102,364	82,226
Level 2 \| Accrued liabilities and other short-term obligations
Liabilities:
Accrued liabilities and other short-term obligations	417	681
Level 2 \| Other long-term obligations
Liabilities:
Other long-term obligations	26,248	28,513
Level 3
Assets:
Total assets measured at fair value	0	0
Liabilities:
Total liabilities measured at fair value	0	0
Level 3 \| Cash equivalents
Assets:
Cash equivalents	0	0
Level 3 \| Short-term investments
Assets:
Short-term investments	0	0
Level 3 \| Prepaid expenses and other
Assets:
Other assets	0	0
Level 3 \| Other long-term assets
Assets:
Other assets	0	0
Level 3 \| Accrued liabilities and other short-term obligations
Liabilities:
Accrued liabilities and other short-term obligations	0	0
Level 3 \| Other long-term obligations
Liabilities:
Other long-term obligations	$ 0	$ 0

Inventories (Details) - USD ($) $ in Thousands	3 Months Ended
Inventories (Details) - USD ($) $ in Thousands	Jan. 30, 2021	Feb. 01, 2020	Oct. 31, 2020
Inventory Disclosure [Abstract]
Raw materials	$ 123,388		$ 119,481
Work-in-process	11,353		13,738
Finished goods	257,048		210,050
Deferred cost of goods sold	38,920		40,747
Gross inventories	430,709		384,016
Provision for excess and obsolescence	(40,976)		(39,637)
Inventories, net	389,733		$ 344,379
Provisions	$ 5,905	$ 6,699

Prepaid Expenses and Other (Details) - USD ($) $ in Thousands	3 Months Ended
	Jan. 30, 2021	Feb. 01, 2020	Oct. 31, 2020
Capitalized Contract Cost [Line Items]
Prepaid expenses	$ 76,462		$ 70,647
Prepaid VAT and other taxes	73,767		72,838
Product demonstration equipment, net	44,707		44,793
Other non-trade receivables	26,099		21,981
Derivative assets	8,397		82
Deferred deployment expense	505		604
Prepaid expenses and other	326,110		308,084
Depreciation of product demonstration equipment	2,600	$ 2,200
Contract assets for unbilled accounts receivable, net
Capitalized Contract Cost [Line Items]
Contract assets	85,461		85,843
Capitalized contract acquisition costs
Capitalized Contract Cost [Line Items]
Contract assets	$ 10,712		$ 11,296

Other Balance Sheet Details (Details) - USD ($) $ in Thousands	Jan. 30, 2021	Oct. 31, 2020	Feb. 01, 2020	Nov. 02, 2019
Balance Sheet Related Disclosures [Abstract]
Compensation, payroll related tax and benefits	$ 76,477	$ 135,462
Warranty	48,184	49,868	$ 51,190	$ 48,498
Vacation	28,414	26,945
Finance lease obligations	3,011	2,836
Interest payable	605	672
Other	118,312	118,349
Total accrued liabilities and other short-term obligations	$ 275,003	$ 334,132

Other Balance Sheet Details - Accrued Warranty (Details) - USD ($) $ in Thousands	3 Months Ended
	Jan. 30, 2021	Feb. 01, 2020
Movement in Standard Product Warranty Accrual [Roll Forward]
Beginning Balance	$ 49,868	$ 48,498
Current Period Provisions	3,239	7,898
Settlements	(4,923)	(5,206)
Ending Balance	$ 48,184	$ 51,190

Other Balance Sheet Details - Deferred Revenue (Details) - USD ($) $ in Thousands	Jan. 30, 2021	Oct. 31, 2020
Disaggregation of Revenue [Line Items]
Deferred revenue	$ 190,600	$ 158,363
Less current portion	(136,229)	(108,700)
Long-term deferred revenue	54,371	49,663
Products
Disaggregation of Revenue [Line Items]
Deferred revenue	15,374	17,534
Services
Disaggregation of Revenue [Line Items]
Deferred revenue	$ 175,226	$ 140,829

Derivative Instruments (Details) - USD ($) $ in Millions	3 Months Ended
Derivative Instruments (Details) - USD ($) $ in Millions	Jan. 30, 2021	Oct. 31, 2020
Foreign Currency Forward Contracts \| Designated as hedging instrument \| Cash flow hedging
Derivative [Line Items]
Derivative asset, notional amount	$ 248.3	$ 254.9
Derivative maturity (in months)	24 months
Foreign Currency Forward Contracts \| Not designated as hedging instrument
Derivative [Line Items]
Derivative asset, notional amount	$ 210.4	212.0
Derivative maturity (in months)	12 months
Forward Starting Interest Rate Swaps \| Designated as hedging instrument \| Cash flow hedging \| Secured debt \| 2025 Term Loan
Derivative [Line Items]
Derivative asset, notional amount	$ 350.0	$ 350.0
Derivative, fixed interest rate	2.957%

Accumulated Other Comprehensive Income (Details) - USD ($) $ in Thousands	3 Months Ended
	Jan. 30, 2021	Feb. 01, 2020
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Equity - beginning balance	$ 2,509,597	$ 2,172,761
Other comprehensive gain (loss) before reclassifications	23,001	(5,707)
Amounts reclassified from AOCI	810	80
Equity- ending balance	2,586,513	2,193,650
Accumulated Other Comprehensive Loss
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Equity - beginning balance	(35,358)	(22,084)
Equity- ending balance	(11,547)	(27,711)
Unrealized Gain/(Loss) on Available- for -sale Securities
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Equity - beginning balance	45	152
Other comprehensive gain (loss) before reclassifications	(49)	(86)
Amounts reclassified from AOCI	0	0
Equity- ending balance	(4)	66
Unrealized Gain (Loss) Derivatives \| Foreign Currency Forward Contracts
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Equity - beginning balance	(219)	925
Other comprehensive gain (loss) before reclassifications	7,848	(921)
Amounts reclassified from AOCI	(1,231)	(158)
Equity- ending balance	6,398	(154)
Unrealized Gain (Loss) Derivatives \| Forward Starting Interest Rate Swaps
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Equity - beginning balance	(21,535)	(13,686)
Other comprehensive gain (loss) before reclassifications	(659)	(1,718)
Amounts reclassified from AOCI	2,041	238
Equity- ending balance	(20,153)	(15,166)
Cumulative Foreign Currency Translation Adjustment
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Equity - beginning balance	(13,649)	(9,475)
Other comprehensive gain (loss) before reclassifications	15,861	(2,982)
Amounts reclassified from AOCI	0	0
Equity- ending balance	$ 2,212	$ (12,457)

Leases - Narrative (Details) ft² in Millions, $ in Millions	3 Months Ended
Leases - Narrative (Details) ft² in Millions, $ in Millions	Jan. 30, 2021 USD ($) ft²
Leases [Abstract]
Area leased (in sq ft) \| ft²	1.3
Remaining lease term (up to)	11 years
Extension term (up to)	10 years
Termination period (up to)	5 years
ROU assets that involve subleased or vacant space \| $	$ 4.7

Leases - Leases Included in the Balance Sheet (Details) - USD ($) $ in Thousands	Jan. 30, 2021	Oct. 31, 2020
Operating leases:
Operating ROU assets	$ 54,244	$ 57,026
Operating lease liabilities	76,990	80,450
Finance leases:
Buildings, gross	73,776	70,791
Less: accumulated depreciation	(19,764)	(17,837)
Buildings, net	$ 54,012	$ 52,954
Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List]	us-gaap:PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization	us-gaap:PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization
Finance lease liabilities	$ 66,409
Accrued liabilities and other short-term obligations
Finance leases:
Finance lease liabilities	66,409	$ 64,401
Other long-term obligations
Finance leases:
Finance lease liabilities	$ 66,409	$ 64,401

Leases - Lease Cost (Details) - USD ($) $ in Thousands	3 Months Ended
Leases - Lease Cost (Details) - USD ($) $ in Thousands	Jan. 30, 2021	Feb. 01, 2020
Leases [Abstract]
Operating lease costs	$ 4,229	$ 4,457
Finance lease cost:
Amortization of finance ROU asset	1,165	1,140
Interest on finance lease liabilities	1,221	1,244
Total finance lease cost	2,386	2,384
Non-capitalized lease cost	293	621
Variable lease cost	1,599	1,311
Net lease cost	8,507	8,773
Leasehold Improvements
Property, Plant and Equipment [Line Items]
Amortization	$ 2,300	$ 4,300

Leases - Leases Maturity (Details) - USD ($) $ in Thousands	Jan. 30, 2021	Oct. 31, 2020
Operating Leases
Remaining fiscal 2021	$ 16,077
2022	19,112
2023	15,747
2024	13,237
2025	8,900
Thereafter	9,367
Total lease payments	82,440
Less: Imputed interest	(5,450)
Present value of lease liabilities	76,990	$ 80,450
Less: Current portion of present value of minimum lease payments	(19,364)	(19,035)
Long-term portion of present value of minimum lease payments	57,626	61,415
Finance Leases
Remaining fiscal 2021	7,759
2022	8,215
2023	8,294
2024	8,310
2025	8,494
Thereafter	58,427
Total lease payments	99,499
Present value of lease liabilities	(33,090)
Present value of lease liabilities	66,409
Less: Current portion of present value of minimum lease payments	(3,011)	$ (2,836)
Long-term portion of present value of minimum lease payments	63,398
Lease, Liability, Payment, Due [Abstract]
Remaining fiscal 2021	23,836
2022	27,327
2023	24,041
2024	21,547
2025	17,394
Thereafter	67,794
Total lease payments	181,939
Less: Imputed interest	(38,540)
Present value of lease liabilities	143,399
Less: Current portion of present value of minimum lease payments	(22,375)
Long-term portion of present value of minimum lease payments	$ 121,024

Leases - Weighted Average Remaining Lease Terms and Discount Rates (Details)	Jan. 30, 2021	Oct. 31, 2020
Weighted-average remaining lease term in years:
Operating leases	4 years 8 months 4 days	4 years 10 months 13 days
Finance leases	11 years 5 months 15 days	11 years 8 months 15 days
Weighted-average discount rates:
Operating leases	2.82%	2.82%
Finance leases	7.56%	7.56%

Short-Term and Long-Term Debt - Debt Components (Details) - Secured debt - USD ($) $ in Thousands	Jan. 30, 2021	Oct. 31, 2020	Jan. 23, 2020
Debt Instrument [Line Items]
Deferred Debt Issuance Costs	$ (2,800)	$ (2,900)
2025 Term Loan
Debt Instrument [Line Items]
Principal Balance	686,070		$ 693,000
Unamortized Debt Discount	(1,495)
Deferred Debt Issuance Costs	(2,789)
Net Carrying Value	$ 681,786	$ 683,286

Short-Term and Long-Term Debt (Details) - Secured debt - USD ($) $ in Thousands	3 Months Ended
	Jan. 30, 2021	Feb. 01, 2020	Oct. 31, 2020	Jan. 23, 2020
Debt Instrument [Line Items]
Debt issuance costs, net	$ 2,800		$ 2,900
Amortization of debt issuance costs	200	$ 200
2025 Term Loan
Debt Instrument [Line Items]
Aggregate principal amount	686,070			$ 693,000
Debt issuance costs, net	2,789
Fair value of debt	$ 686,100

Earnings Per Share Calculation - Earnings Per Share Calculation (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Jan. 30, 2021	Feb. 01, 2020
Numerator
Net income used to calculate Basic and Diluted EPS	$ 55,348	$ 62,328
Denominator
Basic weighted average shares outstanding (in shares)	155,174	154,334
Add: Shares underlying outstanding stock options and restricted stock units and issuable under employee stock purchase plan (in shares)	1,409	1,404
Dilutive weighted average shares outstanding (in shares)	156,583	155,738
EPS
Basic EPS (in dollars per share)	$ 0.36	$ 0.40
Diluted EPS (in dollars per share)	$ 0.35	$ 0.40

- Definition

The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.

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- Definition

The amount of net income (loss) for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.

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+ Details

Earnings Per Share Calculation - Antidilutive Securities Excluded (Details) - shares shares in Thousands	3 Months Ended
	Jan. 30, 2021	Feb. 01, 2020
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Total shares excluded due to anti-dilutive effect (in shares)	135	731
Shares underlying stock options and stock unit awards
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Total shares excluded due to anti-dilutive effect (in shares)	135	731

Stockholders' Equity (Details) - USD ($)	3 Months Ended
Stockholders' Equity (Details) - USD ($)	Jan. 30, 2021	Feb. 01, 2020	Dec. 13, 2018
Equity [Abstract]
Stock repurchase program authorized amount			$ 500,000,000
Payments for repurchase of common stock	$ 19,242,000	$ 12,572,000

Stockholders' Equity - Summary of the Stock Repurchase Program (Details) $ / shares in Units, $ in Thousands	3 Months Ended
	Jan. 30, 2021 USD ($) $ / shares shares
Shares Repurchased
Cumulative beginning balance (in shares) \| shares	5,710,912
Repurchase of common stock under the stock repurchase program (in shares) \| shares	251,578
Cumulative ending balance (in shares) \| shares	5,962,490
Weighted-Average Price per Share
Cumulative beginning balance (in dollars per share) \| $ / shares	$ 39.33
Repurchase of common stock under the stock repurchase program (in dollars per share) \| $ / shares	52.49
Cumulative ending balance (in dollars per share) \| $ / shares	$ 39.89
Amount Repurchased (in thousands)
Cumulative beginning balance \| $	$ 224,611
Repurchase of common stock under the stock repurchase program \| $	13,206
Cumulative ending balance \| $	$ 237,817

Share-Based Compensation Expense - Expense in Period (Details) - USD ($) $ in Thousands	3 Months Ended
	Jan. 30, 2021	Feb. 01, 2020
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Share-based compensation expense capitalized in inventory, net	$ (162)	$ 100
Total share-based compensation	18,964	15,602
Cost of Sales
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Share-based compensation expense	2,158	1,513
Product costs
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Share-based compensation expense	953	671
Service costs
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Share-based compensation expense	1,205	842
Operating Expense
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Share-based compensation expense	16,968	13,989
Research and development
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Share-based compensation expense	4,794	3,849
Sales and marketing
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Share-based compensation expense	5,816	4,613
General and administrative
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Share-based compensation expense	$ 6,358	$ 5,527

Share-Based Compensation Expense (Details) - Restricted stock units (RSUs) $ in Millions	3 Months Ended
	Jan. 30, 2021 USD ($)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized share-based compensation	$ 169.0
Weighted-average period for recognition of share-based compensation (in years)	1 year 8 months 4 days

Segments and Entity-Wide Disclosures (Details) $ in Thousands	3 Months Ended
	Jan. 30, 2021 USD ($) segment	Oct. 31, 2020 USD ($)
Segment Reporting [Abstract]
Equipment, building, furniture and fixtures, net	$ 281,228	$ 272,377
Number of operating segments \| segment	4
Operating right-of-use assets	$ 54,244	$ 57,026

Segments and Entity-Wide Disclosures - Other Intangibles Assets, Goodwill and Maintenance Spares (Details) - USD ($) $ in Thousands	Jan. 30, 2021	Oct. 31, 2020
Segment Reporting Information [Line Items]
Other intangible assets, net	$ 91,516
Goodwill	311,294	$ 310,847
Maintenance spares, net	63,008
Operating Segments \| Networking Platforms
Segment Reporting Information [Line Items]
Other intangible assets, net	12,924
Goodwill	66,054
Maintenance spares, net	0
Operating Segments \| Platform Software and Services
Segment Reporting Information [Line Items]
Other intangible assets, net	0
Goodwill	156,191
Maintenance spares, net	0
Operating Segments \| Blue Planet Automation Software and Services
Segment Reporting Information [Line Items]
Other intangible assets, net	78,592
Goodwill	89,049
Maintenance spares, net	0
Operating Segments \| Global Services
Segment Reporting Information [Line Items]
Other intangible assets, net	0
Goodwill	0
Maintenance spares, net	$ 63,008

Segments and Entity-Wide Disclosures - Revenue, Profit (Loss) and Net Income (Loss) Reconciliation (Details) - USD ($) $ in Thousands	3 Months Ended
	Jan. 30, 2021	Feb. 01, 2020
Less: Non-performance operating expenses
Selling and marketing	$ 97,278	$ 107,066
General and administrative	39,993	42,468
Amortization of intangible assets	5,910	5,853
Significant asset impairments and restructuring costs	5,867	4,472
Acquisition and integration costs	307	1,819
Add: Other non-performance financial items
Interest expense and other income (loss), net	(8,481)	(5,169)
Loss on extinguishment and modification of debt	0	(646)
Less: Provision for income taxes	11,966	9,814
Net income	55,348	62,328
Operating Segments
Add: Other non-performance financial items
Net income	225,150	239,635
Operating Segments \| Networking Platforms
Add: Other non-performance financial items
Net income	156,431	168,270
Operating Segments \| Platform Software and Services
Add: Other non-performance financial items
Net income	27,660	28,951
Operating Segments \| Blue Planet Automation Software and Services
Add: Other non-performance financial items
Net income	(2,434)	(3,113)
Operating Segments \| Global Services
Add: Other non-performance financial items
Net income	$ 43,493	$ 45,527

Segments and Entity-Wide Disclosures - Geographic Distribution of Equipment, Building, Furniture and Fixtures (Details) - USD ($) $ in Thousands	Jan. 30, 2021	Oct. 31, 2020
Revenues from External Customers and Long-Lived Assets [Line Items]
Equipment, building, furniture and fixtures, net	$ 335,472	$ 329,403
Canada
Revenues from External Customers and Long-Lived Assets [Line Items]
Equipment, building, furniture and fixtures, net	226,331	214,188
United States
Revenues from External Customers and Long-Lived Assets [Line Items]
Equipment, building, furniture and fixtures, net	62,980	65,321
Other International
Revenues from External Customers and Long-Lived Assets [Line Items]
Equipment, building, furniture and fixtures, net	$ 46,161	$ 49,894

Commitments and Contingencies (Details) $ in Thousands, $ in Millions	3 Months Ended			47 Months Ended
	Jan. 30, 2021 USD ($) government_entity	Jan. 30, 2021 CAD ($) government_entity	Feb. 01, 2020 USD ($)	Jan. 30, 2021 USD ($)	Jan. 30, 2021 CAD ($)	Jan. 30, 2021 CAD ($)
Loss Contingencies [Line Items]
Maximum amount of Canadian grant	$ 45,100			$ 45,100		$ 57.6
Number of Canadian government entities \| government_entity	3	3
Total revenue \| $	$ 757,130		$ 832,912
Amounts receivable from grant	2,500			2,500		$ 3.2
Grants
Loss Contingencies [Line Items]
Total revenue	$ 2,800	$ 3.6		$ 34,600	$ 44.2

- Definition

+ References

+ Details

Subsequent Events (Details) - USD ($) $ / shares in Units, $ in Thousands	1 Months Ended	3 Months Ended
	Mar. 05, 2021	Jan. 30, 2021	Oct. 31, 2020
Subsequent Event [Line Items]
Stock repurchases (in shares)		251,578
Stock repurchases		$ 13,206
Average price of shares repurchased (in dollars per share)		$ 52.49
Aggregate shares repurchased (in shares)		5,962,490	5,710,912
Subsequent event
Subsequent Event [Line Items]
Stock repurchases (in shares)	188,169
Stock repurchases	$ 10,100
Average price of shares repurchased (in dollars per share)	$ 53.69
Aggregate shares repurchased (in shares)	6,150,659
Authorized funds remaining under stock repurchase program	$ 252,100