Ciena (CIEN) 10-Q 10 Mar 21 2021 Q1 Quarterly report Financial data

Cover Page

Cover Page - shares	3 Months Ended
	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 Statemen

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 Statem_2

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)

Condensed Consolidated Balance

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 Balanc_2

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 Statem_3

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 Statem_4

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 DeficitCumulative 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

Interim Financial Statements	3 Months Ended
	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”).

Significant Accounting Policies

Significant Accounting Policies	3 Months Ended
	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

Revenue

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

Restructuring Costs

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 Consolidation 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 Consolidation 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

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

Income Taxes	3 Months Ended
	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.

Short-Term and Long-Term Invest

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

Fair Value Measurements

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.

Inventories

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, October 31, 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

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, October 31, 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

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, October 31, 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, October 31, 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

Derivative Instruments	3 Months Ended
	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

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 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 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 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

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 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 %

Short-Term and Long-Term Debt

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

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

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 Expens

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

Segments and Entity-Wide Disclo

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

Commitments and Contingencies

Commitments and Contingencies	3 Months Ended
	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

Subsequent Events	3 Months Ended
	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 Polici_2

Significant Accounting Policies (Policies)	3 Months Ended
	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

Revenue (Tables)

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 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 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
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, October 31, 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)

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 Consolidation 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 Consolidation 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

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 Inve_2

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 Gross Unrealized Estimated Fair 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 Gross Unrealized Estimated Fair 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 Estimated 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

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)

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, October 31, 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 (Tab

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, October 31, 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 (Ta

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, October 31, 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, October 31, 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 Comprehensi_2

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 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 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)

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 (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.
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 (

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

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	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
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)

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 Expe_2

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 Disc_2

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, October 31, 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 Rev

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 Distribu

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

Revenue - Revenue by Major Cust

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

Revenue - Contract Balances (De

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)

Revenue - Narrative (Details) - USD ($) $ in Millions	3 Months Ended
	Jan. 30, 2021	Feb. 01, 2020	Oct. 31, 2020
Revenue from Contract with Customer [Abstract]
Revenue recognized that was previously deferred	$ 46.4	$ 49
Capitalized contract acquisition costs	15.7		$ 15.3
Amortization of capitalized contract acquisition costs	$ 5.5	$ 5.6

Revenue - Performance Obligatio

Revenue - Performance Obligation (Details) $ in Millions	Jan. 30, 2021USD ($)
Revenue from Contract with Customer [Abstract]
Remaining performance obligation	$ 1,100
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)

Restructuring Costs (Details) $ in Thousands	3 Months Ended
	Jan. 30, 2021USD ($)employee	Feb. 01, 2020USD ($)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, Ne_2

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 Inve_3

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 Inve_4

Short-Term and Long-Term Investments - Legal Maturities of Debt Investments (Details) $ in Thousands	Jan. 30, 2021USD ($)
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

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 - Conde

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)

Inventories (Details) - USD ($) $ in Thousands	3 Months Ended
	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 (Det

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 (De

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 - A

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 - D

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

Derivative Instruments (Details) - USD ($) $ in Millions	3 Months Ended
	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
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	$ 350
Derivative, fixed interest rate	2.957%

Accumulated Other Comprehensi_3

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)

Leases - Narrative (Details) ft² in Millions, $ in Millions	3 Months Ended
	Jan. 30, 2021USD ($)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

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)

Leases - Lease Cost (Details) - USD ($) $ in Thousands	3 Months Ended
	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 (Detai

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 Remai

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 -

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_2

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 Calculatio_2

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

Earnings Per Share Calculatio_3

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)

Stockholders' Equity (Details) - USD ($)	3 Months Ended
	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

Stockholders' Equity - Summary of the Stock Repurchase Program (Details) $ / shares in Units, $ in Thousands	3 Months Ended
	Jan. 30, 2021USD ($)$ / sharesshares
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 Expe_3

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 Expe_4

Share-Based Compensation Expense (Details) - Restricted stock units (RSUs) $ in Millions	3 Months Ended
	Jan. 30, 2021USD ($)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized share-based compensation	$ 169
Weighted-average period for recognition of share-based compensation (in years)	1 year 8 months 4 days

Segments and Entity-Wide Disc_3

Segments and Entity-Wide Disclosures (Details) $ in Thousands	3 Months Ended
	Jan. 30, 2021USD ($)segment	Oct. 31, 2020USD ($)
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 Disc_4

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 Disc_5

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 Disc_6

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 (

Commitments and Contingencies (Details) $ in Thousands, $ in Millions	3 Months Ended			47 Months Ended
	Jan. 30, 2021USD ($)government_entity	Jan. 30, 2021CAD ($)government_entity	Feb. 01, 2020USD ($)	Jan. 30, 2021USD ($)	Jan. 30, 2021CAD ($)	Jan. 30, 2021CAD ($)
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

Subsequent Events (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