Ciena (CIEN) 10-Q6 Sep 232023 Q3 Quarterly reportFinancial data

Company Profile

Cover

Cover - shares	9 Months Ended
Cover - shares	Jul. 29, 2023	Sep. 01, 2023
Cover [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Jul. 29, 2023
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, par value $0.01 per share
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		147,842,355
Entity Central Index Key	0000936395
Current Fiscal Year End Date	--10-28
Document Fiscal Year Focus	2023
Document Fiscal Period Focus	Q3
Amendment Flag	false

CONDENSED CONSOLIDATED STATEMEN

CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Jul. 29, 2023	Jul. 30, 2022	Jul. 29, 2023	Jul. 30, 2022
Revenue:
Total revenue	$ 1,067,886	$ 867,981	$ 3,257,062	$ 2,661,651
Cost of goods sold:
Total cost of goods sold	618,945	527,202	1,864,492	1,534,904
Gross profit	448,941	340,779	1,392,570	1,126,747
Operating expenses:
Research and development	189,392	150,025	561,115	457,758
Selling and marketing	118,266	105,880	367,156	344,700
General and administrative	49,349	41,121	151,184	131,191
Significant asset impairments and restructuring costs	4,174	7,692	16,625	20,203
Amortization of intangible assets	9,487	8,919	26,773	26,757
Acquisition and integration costs	59	35	3,474	598
Total operating expenses	370,727	313,672	1,126,327	981,207
Income from operations	78,214	27,107	266,243	145,540
Interest and other income, net	10,187	366	50,711	4,860
Interest expense	(24,060)	(12,642)	(63,819)	(33,275)
Income before income taxes	64,341	14,831	253,135	117,125
Provision for income taxes	34,608	4,319	89,507	21,868
Net income	$ 29,733	$ 10,512	$ 163,628	$ 95,257
Basic net income per common share (in dollars per share)	$ 0.20	$ 0.07	$ 1.09	$ 0.63
Diluted net income per potential common share (in dollars per share)	$ 0.20	$ 0.07	$ 1.09	$ 0.62
Weighted average basic common shares outstanding (in shares)	149,690	149,862	149,472	152,083
Weighted average dilutive potential common shares outstanding (in shares)	149,977	150,463	149,867	153,209
Products
Revenue:
Total revenue	$ 865,197	$ 684,284	$ 2,678,242	$ 2,109,239
Cost of goods sold:
Total cost of goods sold	516,900	434,756	1,559,120	1,259,378
Services
Revenue:
Total revenue	202,689	183,697	578,820	552,412
Cost of goods sold:
Total cost of goods sold	$ 102,045	$ 92,446	$ 305,372	$ 275,526

CONDENSED CONSOLIDATED STATEM_2

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jul. 29, 2023	Jul. 30, 2022	Jul. 29, 2023	Jul. 30, 2022
Net income	$ 29,733	$ 10,512	$ 163,628	$ 95,257
Change in unrealized gain (loss) on available-for-sale securities, net of tax	378	(79)	2,075	(2,184)
Change in cumulative translation adjustments	10,151	(4,037)	17,981	(22,783)
Other comprehensive gain (loss)	27,977	(5,820)	34,867	(22,318)
Total comprehensive income	57,710	4,692	198,495	72,939
Change in unrealized gain (loss) on foreign currency forward contracts, net of tax
Change in unrealized gain (loss) on cash flow hedges, net of tax	5,124	(91)	9,314	(6,776)
Change in unrealized gain (loss) on interest rate swaps, net of tax
Change in unrealized gain (loss) on cash flow hedges, net of tax	$ 12,324	$ (1,613)	$ 5,497	$ 9,425

CONDENSED CONSOLIDATED BALANCE

CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Jul. 29, 2023	Oct. 29, 2022
Current assets:
Cash and cash equivalents	$ 1,117,922	$ 994,352
Short-term investments	141,843	153,989
Accounts receivable, net of allowance for credit losses of $11.2 million and $11.0 million as of July 29, 2023 and October 29, 2022, respectively.	997,373	920,772
Inventories, net	1,192,522	946,730
Prepaid expenses and other	361,692	370,053
Total current assets	3,811,352	3,385,896
Long-term investments	21,098	35,385
Equipment, building, furniture and fixtures, net	287,455	267,779
Operating right-of-use assets	40,482	45,108
Goodwill	446,596	328,322
Other intangible assets, net	219,085	69,517
Deferred tax asset, net	792,299	824,008
Other long-term assets	104,847	113,617
Total assets	5,723,214	5,069,632
Current liabilities:
Accounts payable	393,144	516,047
Accrued liabilities and other short-term obligations	355,622	360,782
Deferred revenue	188,104	137,899
Operating lease liabilities	16,941	18,925
Current portion of long-term debt	11,930	6,930
Total current liabilities	965,741	1,040,583
Long-term deferred revenue	71,873	62,336
Other long-term obligations	156,893	150,335
Long-term operating lease liabilities	37,800	42,392
Long-term debt, net	1,543,900	1,061,125
Total liabilities	2,776,207	2,356,771
Commitments and contingencies (Note 23)
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; 148,772,513 and 148,412,943 shares issued and outstanding	1,488	1,484
Additional paid-in capital	6,425,899	6,390,252
Accumulated other comprehensive loss	(11,778)	(46,645)
Accumulated deficit	(3,468,602)	(3,632,230)
Total stockholders’ equity	2,947,007	2,712,861
Total liabilities and stockholders’ equity	$ 5,723,214	$ 5,069,632

CONDENSED CONSOLIDATED BALANC_2

CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Millions	Jul. 29, 2023	Oct. 29, 2022
Statement of Financial Position [Abstract]
Allowance for credit losses	$ 11.2	$ 11
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 outstanding (in shares)	148,772,513	148,412,943
Common stock, shares issued (in shares)	148,772,513	148,412,943

CONDENSED CONSOLIDATED STATEM_3

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	9 Months Ended
	Jul. 29, 2023	Jul. 30, 2022
Cash flows used in operating activities:
Net income	$ 163,628	$ 95,257
Adjustments to reconcile net income to net cash used in operating activities:
Depreciation of equipment, building, furniture and fixtures, and amortization of leasehold improvements	69,213	68,280
Share-based compensation costs	95,405	77,827
Amortization of intangible assets	36,274	36,521
Deferred taxes	(64,005)	(19,824)
Provision for inventory excess and obsolescence	18,767	12,038
Provision for warranty	18,860	12,416
Gain on cost method equity investments, net	(26,368)	(4,120)
Other	13,694	3,678
Changes in assets and liabilities:
Accounts receivable	(80,399)	74,478
Inventories	(262,345)	(464,664)
Prepaid expenses and other	72,062	(39,805)
Operating lease right-of-use assets	11,003	12,504
Accounts payable, accruals and other obligations	(133,880)	(37,587)
Deferred revenue	57,547	34,949
Short- and long-term operating lease liabilities	(16,596)	(15,197)
Net cash used in operating activities	(27,140)	(153,249)
Cash flows used in investing activities:
Payments for equipment, furniture, fixtures and intellectual property	(83,422)	(66,908)
Purchases of investments	(119,240)	(614,333)
Proceeds from sales and maturities of investments	150,646	460,000
Settlement of foreign currency forward contracts, net	(3,272)	4,450
Purchase of cost method equity investments	0	(8,000)
Acquisition of business, net of cash acquired	(230,048)	(62,043)
Net cash used in investing activities	(285,336)	(286,834)
Cash flows provided by (used in) financing activities:
Proceeds from issuance of senior notes	0	400,000
Proceeds from issuance of term loan, net	497,500	0
Payment of long-term debt	(6,448)	(3,465)
Payment of debt issuance costs	(5,422)	(5,159)
Payment of finance lease obligations	(2,830)	(2,555)
Shares repurchased for tax withholdings on vesting of stock unit awards	(29,794)	(41,280)
Repurchases of common stock - repurchase program, net	(57,736)	(487,792)
Proceeds from issuance of common stock	31,276	30,224
Net cash provided by (used in) financing activities	426,546	(110,027)
Effect of exchange rate changes on cash, cash equivalents and restricted cash	9,501	(12,780)
Net increase (decrease) in cash, cash equivalents and restricted cash	123,571	(562,890)
Cash, cash equivalents and restricted cash at beginning of period	994,378	1,422,604
Cash, cash equivalents and restricted cash at end of period	1,117,949	859,714
Supplemental disclosure of cash flow information
Cash paid during the period for interest	56,709	24,823
Cash paid during the period for income taxes, net	68,058	28,593
Operating lease payments	18,038	16,342
Non-cash investing and financing activities
Purchase of equipment in accounts payable	4,579	9,320
Repurchase of common stock in accrued liabilities from repurchase program	3,500	5,000
Operating right-of-use assets subject to lease liability	9,771	8,226
Gain on cost method equity investments, net	$ 26,368	$ 4,120

CONDENSED CONSOLIDATED STATEM_4

CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS’ EQUITY - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-in-Capital	Accumulated Other Comprehensive Income (Loss)	Accumulated Deficit
Beginning balance (in shares) at Oct. 30, 2021		154,858,981
Equity - beginning balance at Oct. 30, 2021	$ 3,020,018	$ 1,549	$ 6,803,162	$ 439	$ (3,785,132)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	95,257				95,257
Other comprehensive income (loss)	(22,318)			(22,318)
Repurchase of common stock - repurchase program, net (in shares)		(8,279,710)
Repurchase of common stock - repurchase program, net	(491,992)	$ (83)	(491,909)
Issuance of shares from employee equity plans (in shares)		2,359,326
Issuance of shares from employee equity plans	30,224	$ 23	30,201
Share-based compensation expense	77,827		77,827
Shares repurchased for tax withholdings on vesting of stock unit awards (in shares)		(645,240)
Shares repurchased for tax withholdings on vesting of stock unit awards	(41,280)	$ (6)	(41,274)
Ending balance (in shares) at Jul. 30, 2022		148,293,357
Equity- ending balance at Jul. 30, 2022	$ 2,667,736	$ 1,483	6,378,007	(21,879)	(3,689,875)
Beginning balance (in shares) at Oct. 29, 2022	148,412,943	148,412,943
Equity - beginning balance at Oct. 29, 2022	$ 2,712,861	$ 1,484	6,390,252	(46,645)	(3,632,230)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	163,628				163,628
Other comprehensive income (loss)	34,867			34,867
Repurchase of common stock - repurchase program, net (in shares)		(1,441,435)
Repurchase of common stock - repurchase program, net	(61,236)	$ (14)	(61,222)
Issuance of shares from employee equity plans (in shares)		2,429,069
Issuance of shares from employee equity plans	31,276	$ 24	31,252
Share-based compensation expense	95,405		95,405
Shares repurchased for tax withholdings on vesting of stock unit awards (in shares)		(628,064)
Shares repurchased for tax withholdings on vesting of stock unit awards	$ (29,794)	$ (6)	(29,788)
Ending balance (in shares) at Jul. 29, 2023	148,772,513	148,772,513
Equity- ending balance at Jul. 29, 2023	$ 2,947,007	$ 1,488	$ 6,425,899	$ (11,778)	$ (3,468,602)

INTERIM FINANCIAL STATEMENTS

INTERIM FINANCIAL STATEMENTS	9 Months Ended
INTERIM FINANCIAL STATEMENTS	Jul. 29, 2023
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. 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 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 29, 2022 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 2022 (the “2022 Annual Report”).

SIGNIFICANT ACCOUNTING POLICIES

SIGNIFICANT ACCOUNTING POLICIES	9 Months Ended
SIGNIFICANT ACCOUNTING POLICIES	Jul. 29, 2023
Accounting Policies [Abstract]
SIGNIFICANT ACCOUNTING POLICIES	SIGNIFICANT ACCOUNTING POLICIES 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 2022 Annual Report. Newly Issued Accounting Standards - Not Yet Effective In October 2021, the Financial Accounting Standards Board (the “FASB”) issued Accounting Standards Update (“ASU”) No. 2021-08 (“ASU 2021-08”), Business Combinations (Topic 805): Accounting for Contract Assets and Contract Liabilities from Contracts with Customers to improve the accounting for acquired revenue contracts with customers in a business combination to address recognition of an acquired contract liability and payment terms and their effect on subsequent revenue recognized by the acquirer. ASU 2021-08 is effective for annual periods beginning after December 15, 2022 on a prospective basis. Early adoption is permitted. Ciena is currently evaluating the impact of this ASU on its condensed consolidated financial statements and related disclosures.

REVENUE

REVENUE	9 Months Ended
REVENUE	Jul. 29, 2023
Revenue from Contract with Customer [Abstract]
REVENUE	REVENUE Disaggregation of Revenue Ciena’s disaggregated revenue as presented below depicts the nature, amount, and timing of revenue and cash flows for similar groupings of Ciena’s various offerings. The sales cycle, contractual obligations, customer requirements, and go-to-market strategies may differ across Ciena’s product lines, resulting in different economic risk profiles for each line. The tables below set forth Ciena’s disaggregated revenue for the periods indicated (in thousands): Quarter Ended July 29, 2023 Networking Platforms Platform Software and Services Blue Planet Automation Software and Services Global Services Total Product lines: Converged Packet Optical $ 718,997 $ — $ — $ — $ 718,997 Routing and Switching 127,563 — — — 127,563 Platform Software and Services — 78,880 — — 78,880 Blue Planet Automation Software and Services — — 13,167 — 13,167 Maintenance Support and Training — — — 72,887 72,887 Installation and Deployment — — — 46,840 46,840 Consulting and Network Design — — — 9,552 9,552 Total revenue by product line $ 846,560 $ 78,880 $ 13,167 $ 129,279 $ 1,067,886 Timing of revenue recognition: Products and services at a point in time $ 846,560 $ 15,980 $ 2,832 $ 11,886 $ 877,258 Services transferred over time — 62,900 10,335 117,393 190,628 Total revenue by timing of revenue recognition $ 846,560 $ 78,880 $ 13,167 $ 129,279 $ 1,067,886 Quarter Ended July 30, 2022 Networking Platforms Platform Software and Services Blue Planet Automation Software and Services Global Services Total Product lines: Converged Packet Optical $ 563,837 $ — $ — $ — $ 563,837 Routing and Switching 100,741 — — — 100,741 Platform Software and Services — 63,483 — — 63,483 Blue Planet Automation Software and Services — — 17,342 — 17,342 Maintenance Support and Training — — — 72,760 72,760 Installation and Deployment — — — 38,704 38,704 Consulting and Network Design — — — 11,114 11,114 Total revenue by product line $ 664,578 $ 63,483 $ 17,342 $ 122,578 $ 867,981 Timing of revenue recognition: Products and services at a point in time $ 664,578 $ 15,230 $ 4,632 $ 9,408 $ 693,848 Services transferred over time — 48,253 12,710 113,170 174,133 Total revenue by timing of revenue recognition $ 664,578 $ 63,483 $ 17,342 $ 122,578 $ 867,981 Nine Months Ended July 29, 2023 Networking Platforms Platform Software and Services Blue Planet Automation Software and Services Global Services Total Product lines: Converged Packet Optical $ 2,239,180 $ — $ — $ — $ 2,239,180 Routing and Switching 377,378 — — — 377,378 Platform Software and Services — 221,768 — — 221,768 Blue Planet Automation Software and Services — — 49,139 — 49,139 Maintenance Support and Training — — — 213,938 213,938 Installation and Deployment — — — 120,901 120,901 Consulting and Network Design — — — 34,758 34,758 Total revenue by product line $ 2,616,558 $ 221,768 $ 49,139 $ 369,597 $ 3,257,062 Timing of revenue recognition: Products and services at a point in time $ 2,616,558 $ 48,290 $ 14,143 $ 36,553 $ 2,715,544 Services transferred over time — 173,478 34,996 333,044 541,518 Total revenue by timing of revenue recognition $ 2,616,558 $ 221,768 $ 49,139 $ 369,597 $ 3,257,062 Nine months ended July 30, 2022 Networking Platforms Platform Software and Services Blue Planet Automation Software and Services Global Services Total Product lines: Converged Packet Optical $ 1,730,066 $ — $ — $ — $ 1,730,066 Routing and Switching 295,638 — — — 295,638 Platform Software and Services — 205,557 — — 205,557 Blue Planet Automation Software and Services — — 55,334 — 55,334 Maintenance Support and Training — — — 219,270 219,270 Installation and Deployment — — — 120,504 120,504 Consulting and Network Design — — — 35,282 35,282 Total revenue by product line $ 2,025,704 $ 205,557 $ 55,334 $ 375,056 $ 2,661,651 Timing of revenue recognition: Products and services at a point in time $ 2,025,704 $ 66,655 $ 17,442 $ 31,368 $ 2,141,169 Services transferred over time — 138,902 37,892 343,688 520,482 Total revenue by timing of revenue recognition $ 2,025,704 $ 205,557 $ 55,334 $ 375,056 $ 2,661,651 Ciena reports its sales geographically using the following markets: (i) the United States, Canada, the Caribbean and Latin America (“Americas”); (ii) Europe, Middle East and Africa (“EMEA”); and (iii) Asia Pacific, Japan and India (“APAC”). Within each geographic area, Ciena maintains specific teams or personnel that focus on a particular region, country, customer or market vertical. These teams include sales management, account salespersons, and sales engineers, as well as services professionals and commercial management personnel. The following table reflects Ciena’s geographic distribution of revenue based principally on the relevant location for Ciena’s delivery of products and performance of services. For the periods indicated, Ciena’s geographic distribution of revenue was as follows (in thousands): Quarter Ended Nine Months Ended July 29, July 30, July 29, July 30, 2023 2022 2023 2022 Geographic distribution: Americas $ 749,479 $ 617,366 $ 2,308,934 $ 1,913,350 EMEA 152,834 124,185 479,053 420,075 APAC 165,573 126,430 469,075 328,226 Total revenue by geographic distribution $ 1,067,886 $ 867,981 $ 3,257,062 $ 2,661,651 Ciena’s revenue includes $685.8 million and $574.3 million of United States revenue for the third quarter of fiscal 2023 and 2022, respectively. For th e nine months ended July 29, 2023 and July 30, 2022 , United States revenue was $2.1 billion and $1.8 billion, respectively. No other country accounted for 10% or more of total revenue for the periods indicated in the above table. For the periods indicated, the only customers that accounted for at least 10% of Ciena’s revenue were as follows (in thousands): Quarter Ended Nine Months Ended July 29, July 30, July 29, July 30, 2023 2022 2023 2022 Web-scale provider $ 124,897 n/a $ 369,678 n/a AT&T n/a 100,293 $ 357,382 314,358 Verizon n/a 108,495 n/a 273,158 Total $ 124,897 $ 208,788 $ 727,060 $ 587,516 _____________________________________ n/a Denotes revenue representing less than 10% of total revenue for the period The Web-scale provider noted in the above table purchased products from each of Ciena’s operating segments excluding Blue Planet ® Automation Software and Services for each of the periods presented. The other customers identified above purchased products and services from each of Ciena’s operating segments for each of the periods presented. • 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, the Waveserver ® modular interconnect system, the 6500 Reconfigurable Line System (RLS), the 5400 family of Packet-Optical Platforms, and the Coherent ELS open line system (OLS). This product line includes the WL5n 100G-400G coherent pluggable transceivers. This product line also includes the Z-Series Packet-Optical Platform and Optical Microsystems products. • Routing and Switching - includes the 3000 family of service delivery platforms and the 5000 family of service aggregation. This product line also includes the 6500 Packet Transport System (PTS), which combines packet switching, control plane operation, and integrated optics, the 8100 Coherent IP networking platforms, the 8700 Packetwave Platform, and virtualization software. This product line also includes SD-Edge software and passive optical network (“PON”) routing and switching portfolio products from our recent acquisitions of Benu Networks, Inc. (“Benu”) and Tibit Communications, Inc. (“Tibit”) respectively, during the first quarter of fiscal 2023. This product line also includes Ciena’s WaveRouter ® product, which was introduced during the second quarter of fiscal 2023, for which there have been no sales to date. 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 offerings provide domain control management, analytics, data and planning tools, and applications to assist customers in managing their networks, including by creating more efficient operations and more proactive visibility into their networks. Ciena’s platform software includes its Manage, Control and Plan (“MCP”) domain controller solution, its suite of MCP applications, and its OneControl Unified Management System, as well as planning tools and a number of legacy software solutions that support Ciena’s 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, cloud native, and standards-based software portfolio, together with related services, that enables customers to realize digital transformation through the automation of the services lifecycle. 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 distinct performance obligations in which revenue is generally recognized upfront at a point in time upon transfer of control. Revenue from software subscription and support is 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 is 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 for which 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 is also 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 as of the dates indicated (in thousands): Balance at July 29, 2023 Balance at October 29, 2022 Accounts receivable, net $ 997,373 $ 920,772 Contract assets for unbilled accounts receivable, net $ 142,305 $ 156,039 Deferred revenue $ 259,977 $ 200,235 Ciena’s 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 in the Condensed Consolidated Balance Sheets. See Note 11 below. Contract liabilities consist of deferred revenue and represent advanced payments against non-cancelable customer orders received prior to revenue recognition. Ciena recognized approximately $119.8 million and $98.9 million of revenue during the first nine months of fiscal 2023 and 2022, respectively, that was included in the deferred revenue balance as of October 29, 2022 and October 30, 2021, respectively. Revenue recognized due to changes in transaction price from performance obligations satisfied or partially satisfied in previous periods was immaterial during the nine months ended July 29, 2023 and July 30, 2022. Capitalized Contract Acquisition Costs Capitalized contract acquisition costs consist of deferred sales commissions, and were $31.4 million and $39.7 million as of July 29, 2023 and October 29, 2022, respectively. Capitalized contract acquisition costs were included in (i) prepaid expenses and other and (ii) other long-term assets. The amortization expense associated with these costs was $26.0 million and $20.5 million during the first nine months of fiscal 2023 and 2022, respectively, and was included in selling and marketing expense on the Condensed Consolidated Statements of Operations. Remaining Performance Obligations Remaining Performance Obligations (“RPO”) are comprised of non-cancelable customer purchase orders for products and services that are awaiting transfer of control for revenue recognition under the applicable contract terms. As of July 29, 2023, the aggregate amount of RPO was $2.1 billion. As of July 29, 2023, Ciena expects approximately 84% of the RPO to be recognized as revenue within the next 12 months.

BUSINESS COMBINATIONS

BUSINESS COMBINATIONS	9 Months Ended
BUSINESS COMBINATIONS	Jul. 29, 2023
Business Combination and Asset Acquisition [Abstract]
BUSINESS COMBINATIONS	BUSINESS COMBINATIONS Benu and Tibit Acquisitions On November 17, 2022, Ciena acquired Benu, a portfolio of cloud-native software solutions, including a virtual Broadband Network Gateway ((v)BNG), that complements Ciena’s existing portfolio of broadband access solutions. On December 30, 2022, Ciena acquired Tibit, a provider and developer of PON-specific hardware and operating software that can be integrated into a carrier-grade Ethernet switch and will strengthen Ciena’s portfolio of next-generation PON solutions that support residential, enterprise, and mobility use cases. These businesses were acquired for an aggregate of approximately $291.7 million, of which $244.7 million was paid in cash, and $47.0 million represents the fair value of Ciena’s previously held cost method equity investment in Tibit. The acquisition of Tibit triggered the remeasurement of Ciena’s previously held investment in Tibit to fair value, which resulted in Ciena recognizing a gain on its cost method equity investment of $26.5 million. Each of these transactions has been accounted for as the acquisition of a business. Ciena incurred approximately $3.4 million in acquisition-related costs associated with these acquisitions. These costs and expenses primarily include fees associated with financial, legal, and accounting advisors and employment-related costs. These costs were recorded in acquisition and integration costs on the Condensed Consolidated Statements of Operations. The following table summarizes the final purchase price allocation related to the acquisitions based on the estimated fair value of the acquired assets and assumed liabilities (in thousands): Amount Cash and cash equivalents $ 14,634 Accounts receivable, net 443 Inventories, net 1,406 Prepaid expenses and other 810 Equipment, furniture and fixtures 1,090 Goodwill 117,997 Developed technology 75,400 In-process technology 89,100 Customer relationships and contracts 18,400 Order backlog 2,480 Deferred tax asset, net (27,782) Accounts payable (420) Accrued liabilities and other short-term obligations (874) Deferred revenue (851) Other long-term obligations (144) Total purchase consideration $ 291,689 Developed technology represents purchased technology that has reached technological feasibility and for which the acquired companies had substantially completed development as of the date of acquisition. Fair value was determined using future discounted cash flows related to the projected income stream of the developed technology for a discrete projection period. Cash flows were discounted to their present value as of the closing date. Developed technology is amortized on a straight-line basis over its estimated useful life of five years. In-process technology represents purchased technology that had not reached technological feasibility as of the date of acquisition. Fair value was determined using future discounted cash flows related to the projected income stream of the in-process technology for a discrete projection period. Cash flows were discounted to their present value as of the closing date. Upon completion of the in-process technology, it will be amortized on a straight line basis over its estimated useful life, which will be determined on that date. Customer relationships and contracts represent agreements with existing Tibit customers and have an estimated useful life of three years. Order backlog is amortized over the fulfillment period. The goodwill generated from these acquisitions is primarily related to expected economic synergies. The total goodwill amount was recorded in the Networking Platforms segment. The goodwill is not deductible for income tax purposes. Pro forma disclosures have not been included due to immateriality. The amounts of revenue and earnings for these acquisitions since the acquisition dates, which are included on the Condensed Consolidated Statements of Operations for the reporting period are immaterial.

SIGNIFICANT ASSET IMPAIRMENT AN

SIGNIFICANT ASSET IMPAIRMENT AND RESTRUCTURING COSTS	9 Months Ended
SIGNIFICANT ASSET IMPAIRMENT AND RESTRUCTURING COSTS	Jul. 29, 2023
Restructuring and Related Activities [Abstract]
SIGNIFICANT ASSET IMPAIRMENT AND RESTRUCTURING COSTS	SIGNIFICANT ASSET IMPAIRMENT AND RESTRUCTURING COSTS Restructuring Costs Ciena has undertaken a number of restructuring activities intended to reduce expense and to 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 the Condensed Consolidated Balance Sheets, for the nine months ended July 29, 2023 (in thousands): Workforce Other restructuring activities Total Balance at October 29, 2022 $ 1,215 $ 4,620 $ 5,835 Charges 4,509 (1) 12,116 (2) 16,625 Cash payments (4,920) (16,736) (21,656) Balance at July 29, 2023 $ 804 $ — $ 804 Current restructuring liabilities $ 804 $ — $ 804 (1) Reflects employee costs associated with workforce reductions during the nine months ended July 29, 2023 as part of a business optimization strategy to improve gross margin, constrain operating expense, and redesign certain business processes. (2) Primarily represents costs related to restructured real estate facilities and the redesign of certain business processes associated with Ciena’s supply chain and distribution structure reorganization. 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 the Condensed Consolidated Balance Sheets for the nine months ended July 30, 2022 (in thousands): Workforce Other restructuring activities Total Balance at October 30, 2021 $ 781 $ — $ 781 Charges 2,224 (1) 13,992 (2) 16,216 Cash payments (2,423) (13,115) (15,538) Balance at July 30, 2022 $ 582 $ 877 $ 1,459 Current restructuring liabilities $ 582 $ 877 $ 1,459 (1) Reflects employee costs associated with workforce reductions during the nine months ended July 30, 2022 as part of a business optimization strategy to improve gross margin, constrain operating expense, and redesign certain business processes. (2) Primarily represents the redesign of certain business processes associated with Ciena’s supply chain and distribution structure reorganization and costs related to restructured real estate facilities.

INTEREST AND OTHER INCOME, NET

INTEREST AND OTHER INCOME, NET	9 Months Ended
INTEREST AND OTHER INCOME, NET	Jul. 29, 2023
Other Income and Expenses [Abstract]
INTEREST AND OTHER INCOME, NET	INTEREST AND OTHER INCOME, NET The components of interest and other income, net, are as follows for the periods indicated (in thousands): Quarter Ended Nine Months Ended July 29, July 30, July 29, July 30, 2023 2022 2023 2022 Interest income $ 12,835 $ 2,774 $ 30,365 $ 4,962 Gains (losses) on non-hedge designated foreign currency forward contracts 1,679 (985) (2,885) (2,911) Foreign currency exchange gains (losses) (4,031) (788) (2,927) 2,711 Gain (loss) on cost method equity investments, net (87) — 26,368 4,120 Other (209) (635) (210) (4,022) Interest and other income, net $ 10,187 $ 366 $ 50,711 $ 4,860 During the first quarter of fiscal 2023, the acquisition of Tibit triggered the remeasurement of Ciena’s previously held investment in Tibit to fair value, which resulted in Ciena recognizing a gain on its cost method equity investment of $26.5 million. See Note 4 above. 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 . During the first nine months of fiscal 2023, Ciena recorded $2.9 million in foreign currency exchange rate losses a s a result of monetary assets and liabilities that were transacted in a currency other than Ciena’s functional currency. D uring the first nine months of fiscal 2022, Ciena recorded $2.7 million in foreign currency exchange rate gains a s a result of monetary assets and liabilities that were transacted in a currency other than Ciena’s functional currency. The related remeasurement adjustments were recorded in interest and other income, 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, net, on the Condensed Consolidated Statements of Operations. During each of the first nine months of fiscal 2023 and 2022 , Ciena recorded losses of $2.9 million

INCOME TAXES

INCOME TAXES	9 Months Ended
INCOME TAXES	Jul. 29, 2023
Income Tax Disclosure [Abstract]
INCOME TAXES	INCOME TAXES The effective tax rate for the quarter and nine months ended July 29, 2023 was higher than the effective tax rate for the quarter and nine months ended July 30, 2022, primarily due to the mandatory capitalization of research and development expenses in the third quarter and nine months ended July 29, 2023, in response to changes in U.S. tax policy.

CASH EQUIVALENT, SHORT-TERM AND

CASH EQUIVALENT, SHORT-TERM AND LONG-TERM INVESTMENTS	9 Months Ended
CASH EQUIVALENT, SHORT-TERM AND LONG-TERM INVESTMENTS	Jul. 29, 2023
Investments, Debt and Equity Securities [Abstract]
CASH EQUIVALENT, SHORT-TERM AND LONG-TERM INVESTMENTS	CASH EQUIVALENT, SHORT-TERM AND LONG-TERM INVESTMENTSAs of the dates indicated, investments are comprised of the following (in thousands): July 29, 2023 Amortized Cost Gross Unrealized Gross Unrealized Estimated Fair U.S. government obligations $ 94,715 $ 1 $ (976) $ 93,740 Corporate debt securities 63,401 2 (155) 63,248 Time deposits 80,854 1 (12) 80,843 $ 238,970 $ 4 $ (1,143) $ 237,831 Included in cash equivalents $ 74,890 $ — $ — $ 74,890 Included in short-term investments 142,743 4 (904) 141,843 Included in long-term investments 21,337 — (239) 21,098 $ 238,970 $ 4 $ (1,143) $ 237,831 October 29, 2022 Amortized Cost Gross Unrealized Gross Unrealized Estimated Fair U.S. government obligations $ 137,963 $ — $ (3,379) $ 134,584 Corporate debt securities 54,899 1 (405) 54,495 Time deposits 55,889 — (64) 55,825 $ 248,751 $ 1 $ (3,848) $ 244,904 Included in cash equivalents $ 55,530 $ — $ — $ 55,530 Included in short-term investments 156,430 1 (2,442) 153,989 Included in long-term investments 36,791 — (1,406) 35,385 $ 248,751 $ 1 $ (3,848) $ 244,904 The following table summarizes the final legal maturities of debt investments as of July 29, 2023 (in thousands): Amortized Estimated Less than one year $ 217,633 $ 216,733 Due in 1-2 years 21,337 21,098 $ 238,970 $ 237,831

FAIR VALUE MEASUREMENTS

FAIR VALUE MEASUREMENTS	9 Months Ended
FAIR VALUE MEASUREMENTS	Jul. 29, 2023
Fair Value Disclosures [Abstract]
FAIR VALUE MEASUREMENTS	FAIR VALUE MEASUREMENTS As of the dates indicated, the following tables summarize the assets and liabilities that are recorded at fair value on a recurring basis (in thousands): July 29, 2023 Level 1 Level 2 Level 3 Total Assets: Money market funds $ 767,668 $ — $ — $ 767,668 Bond mutual fund 102,715 — — 102,715 Time deposits 80,843 — — 80,843 Deferred compensation plan assets 12,203 — — 12,203 U.S. government obligations — 93,740 — 93,740 Corporate debt securities — 63,248 — 63,248 Foreign currency forward contracts — 2,574 — 2,574 Interest rate swaps — 19,528 — 19,528 Total assets measured at fair value $ 963,429 $ 179,090 $ — $ 1,142,519 Liabilities: Foreign currency forward contracts $ — $ 4,691 $ — $ 4,691 Interest rate swaps — 32 — 32 Total liabilities measured at fair value $ — $ 4,723 $ — $ 4,723 October 29, 2022 Level 1 Level 2 Level 3 Total Assets: Money market funds $ 639,024 $ — $ — $ 639,024 Bond mutual fund 71,145 — — 71,145 Time deposits 55,825 — — 55,825 Deferred compensation plan assets 12,751 — — 12,751 U.S. government obligations — 134,584 — 134,584 Corporate debt securities — 54,495 — 54,495 Foreign currency forward contracts — 251 — 251 Interest rate swaps — 12,306 — 12,306 Total assets measured at fair value $ 778,745 $ 201,636 $ — $ 980,381 Liabilities: Foreign currency forward contracts $ — $ 15,605 $ — $ 15,605 Total liabilities measured at fair value $ — $ 15,605 $ — $ 15,605 As of the dates indicated, the assets and liabilities above are presented on Ciena’s Condensed Consolidated Balance Sheets as follows (in thousands): July 29, 2023 Level 1 Level 2 Level 3 Total Assets: Cash equivalents $ 944,714 $ 559 $ — $ 945,273 Short-term investments 6,512 135,331 — 141,843 Prepaid expenses and other — 2,574 — 2,574 Long-term investments — 21,098 — 21,098 Other long-term assets 12,203 19,528 — 31,731 Total assets measured at fair value $ 963,429 $ 179,090 $ — $ 1,142,519 Liabilities: Accrued liabilities and other short-term obligations $ — $ 4,691 $ — $ 4,691 Other long-term obligations — 32 — 32 Total liabilities measured at fair value $ — $ 4,723 $ — $ 4,723 October 29, 2022 Level 1 Level 2 Level 3 Total Assets: Cash equivalents $ 757,725 $ 7,974 $ — $ 765,699 Short-term investments 8,269 145,720 — 153,989 Prepaid expenses and other — 251 — 251 Long-term investments — 35,385 — 35,385 Other long-term assets 12,751 12,306 — 25,057 Total assets measured at fair value $ 778,745 $ 201,636 $ — $ 980,381 Liabilities: Accrued liabilities and other short-term obligations $ — $ 15,605 $ — $ 15,605 Total liabilities measured at fair value $ — $ 15,605 $ — $ 15,605 Ciena did not have any transfers between Level 1 and Level 2 fair value measurements during the periods presented.

INVENTORIES

INVENTORIES	9 Months Ended
INVENTORIES	Jul. 29, 2023
Inventory Disclosure [Abstract]
INVENTORIES	INVENTORIES As of the dates indicated, inventories are comprised of the following (in thousands): July 29, October 29, Raw materials $ 771,955 $ 664,916 Work-in-process 51,763 18,232 Finished goods 333,544 258,584 Deferred cost of goods sold 77,521 41,084 Gross inventories 1,234,783 982,816 Reserve for inventory excess and obsolescence (42,261) (36,086) Inventories, net $ 1,192,522 $ 946,730 The increase in raw materials inventory is related to the steps Ciena has taken to mitigate the impact of supply chain constraints on its business and customers in recent prior periods and a global market shortage of semiconductor components. The increase in finished goods inventories resulted primarily from planned fulfillment of customer advance orders for which some deliveries have been rescheduled. 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,

PREPAID EXPENSES AND OTHER

PREPAID EXPENSES AND OTHER	9 Months Ended
PREPAID EXPENSES AND OTHER	Jul. 29, 2023
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): July 29, October 29, Contract assets for unbilled accounts receivable, net $ 142,305 $ 156,039 Prepaid VAT and other taxes 75,637 63,975 Prepaid expenses 55,997 55,440 Product demonstration equipment, net 41,691 35,929 Capitalized contract acquisition costs 24,349 33,516 Other non-trade receivables 17,734 24,026 Foreign currency forward contracts 2,574 251 Deferred deployment expense 1,405 877 $ 361,692 $ 370,053 Depreciation of product demonstration equipment was $5.9 million during the first nine months of fiscal 2023 and $6.8 million during the first nine months of fiscal 2022. For further discussion on contract assets and capitalized contract acquisition costs, see Note 3 above.

INTANGIBLE ASSETS

INTANGIBLE ASSETS	9 Months Ended
INTANGIBLE ASSETS	Jul. 29, 2023
Goodwill and Intangible Assets Disclosure [Abstract]
INTANGIBLE ASSETS	INTANGIBLE ASSETS As of the dates indicated, intangible assets are comprised of the following (in thousands): July 29, 2023 October 29, 2022 Gross Accumulated Net Gross Accumulated Net Developed technology $ 503,618 $ (408,090) $ 95,528 $ 428,218 $ (386,300) $ 41,918 In-process technology 89,100 — 89,100 — — — Patents and licenses 8,795 (4,967) 3,828 8,415 (4,228) 4,187 Customer relationships, covenants not to compete, outstanding purchase orders and contracts 411,384 (380,755) 30,629 390,271 (366,859) 23,412 Total intangible assets $ 1,012,897 $ (793,812) $ 219,085 $ 826,904 $ (757,387) $ 69,517 The aggregate amortization expense of intangible assets was $36.3 million during the first nine months of fiscal 2023 and $36.5 million during the first nine months of fiscal 2022. Expected future amortization of intangible assets for the fiscal years indicated is as follows (in thousands): Fiscal Year Amount Remaining fiscal 2023 $ 14,170 2024 39,836 2025 34,635 2026 23,348 2027 15,843 Thereafter 2,153 $ 129,985 (1) (1) Does not include amortization of in-process technology, as estimation of the timing of future amortization expense would be impractical.

GOODWILL

GOODWILL	9 Months Ended
GOODWILL	Jul. 29, 2023
Goodwill and Intangible Assets Disclosure [Abstract]
GOODWILL	GOODWILL The following table presents the goodwill allocated to Ciena’s operating segments as of July 29, 2023 and October 29, 2022, as well as the changes to goodwill during the first nine months of fiscal 2023 (in thousands): Balance at October 29, 2022 Acquisitions Impairments Translation Balance at July 29, 2023 Platform Software and Services $ 156,191 $ — $ — $ — $ 156,191 Blue Planet Automation Software and Services 89,049 — — — 89,049 Networking Platforms 83,082 117,997 — 277 201,356 Total $ 328,322 $ 117,997 $ — $ 277 $ 446,596

OTHER BALANCE SHEET DETAILS

OTHER BALANCE SHEET DETAILS	9 Months Ended
OTHER BALANCE SHEET DETAILS	Jul. 29, 2023
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): July 29, October 29, Compensation, payroll related tax and benefits $ 104,303 $ 126,338 Warranty 49,504 45,503 Income taxes payable 34,577 11,472 Vacation 30,344 26,396 Foreign currency forward contracts 4,691 15,604 Interest payable 9,779 4,793 Finance lease liabilities 4,063 3,758 Other 118,361 126,918 $ 355,622 $ 360,782 The following table summarizes the activity in Ciena’s accrued warranty for the periods indicated (in thousands): Beginning Balance Current Period Provisions Settlements Ending Balance Nine Months Ended July 30, 2022 $ 48,019 12,416 (14,746) $ 45,689 Nine Months Ended July 29, 2023 $ 45,503 18,860 (14,859) $ 49,504 As of the dates indicated, deferred revenue is comprised of the following (in thousands): July 29, October 29, Products $ 34,102 $ 19,814 Services 225,875 180,421 Total deferred revenue 259,977 200,235 Less current portion (188,104) (137,899) Long-term deferred revenue $ 71,873 $ 62,336

DERIVATIVE INSTRUMENTS

DERIVATIVE INSTRUMENTS	9 Months Ended
DERIVATIVE INSTRUMENTS	Jul. 29, 2023
Derivative Instruments and Hedging Activities Disclosure [Abstract]
DERIVATIVE INSTRUMENTS	DERIVATIVE INSTRUMENTS Foreign Currency Derivatives Ciena conducts business globally in numerous currencies, and thus is exposed to adverse foreign currency exchange rate changes. To limit this exposure, Ciena enters into foreign currency contracts. Ciena does not enter into such contracts for speculative purposes. As of July 29, 2023 and October 29, 2022, Ciena had forward contracts to hedge its foreign exchange exposure in order to reduce variability in certain currencies for expenses principally related to research and development activities. The notional amount of these contracts was approximately $291.4 million and $272.2 million as of July 29, 2023 and October 29, 2022, respectively. These foreign exchange contracts have maturities of 24 months or less and have been designated as cash flow hedges. In May 2023, Ciena entered into forward contracts designated as net investment hedges to minimize the effect of foreign exchange rate movements on its net investments in foreign operations. The notional amount of these contracts was approximately $48.6 million as of July 29, 2023. These foreign exchange contracts have maturities of 24 months or less and have been designated as net investment hedges. As of July 29, 2023 and October 29, 2022, 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 $255.9 million and $108.0 million as of July 29, 2023 and October 29, 2022, 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 interest on its term loan borrowings (see Note 16 below) and has hedged such risk by entering into floating-to-fixed interest rate swap arrangements. Prior to amending the 2025 Term Loan (as defined in Note 16 below) to replace LIBOR with the Secured Overnight Financing Rate (“SOFR”), Ciena was exposed to floating rates of LIBOR interest on its 2025 Term Loan borrowings. Ciena hedged this 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 at 2.957% through September 2023. In January 2023, Ciena entered into a LIBOR to SOFR basis swap (“basis swap”) to hedge its exposure to SOFR rate. The basis swap offsets the LIBOR exposure risk of the interest rate swaps and effectively fixes the SOFR rate for $350.0 million of the 2025 Term Loan at 2.883% through September 2023. The total notional amount of these swaps in effect was $350.0 million as of July 29, 2023 and October 29, 2022. In April 2022, Ciena entered into floating to fixed forward starting interest rate swap arrangements (“forward starting swaps”). The forward starting swaps fix the SOFR for $350.0 million of the 2025 Term Loan at 2.968% from September 2023 through the 2025 Term Loan maturity. The total notional amount of forward starting swaps effective September 2023 was $350.0 million as of July 29, 2023. In January 2023, Ciena entered into floating-to-fixed interest rate swap arrangements (“2028 interest rate swaps”). The 2028 interest rate swaps fix the SOFR rate of approximately $350.0 million of the principal amount of the 2030 Term Loan (as defined in Note 16 below) at 3.47% through January 2028. The total notional amount of these interest rate swaps in effect as of July 29, 2023 was $350.0 million. Ciena expects the variable rate payments to be received under the terms of the interest rate swaps, basis swap, forward starting swaps, and 2028 interest rate swaps to offset exactly the forecasted variable rate payments on the equivalent notional amounts of the 2025 Term Loan and 2030 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 6 and Note 9 above.

SHORT-TERM AND LONG-TERM DEBT

SHORT-TERM AND LONG-TERM DEBT	9 Months Ended
SHORT-TERM AND LONG-TERM DEBT	Jul. 29, 2023
Debt Disclosure [Abstract]
SHORT-TERM AND LONG-TERM DEBT	SHORT-TERM AND LONG-TERM DEBT Outstanding Term Loans Payable 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”). On January 19, 2023, in connection with the Incremental Agreement (as defined below) to the Credit Agreement (as defined below), the Credit Agreement was amended to replace LIBOR with SOFR for the 2025 Term Loan in response to pending impact of FASB Accounting Standards Codification 848, Reference Rate Reform . The net carrying value of the 2025 Term Loan was comprised of the following as of the dates indicated (in thousands): July 29, 2023 October 29, 2022 Principal Balance Unamortized Discount Deferred Debt Issuance Costs Net Carrying Value Net Carrying Value 2025 Term Loan $ 670,478 $ (687) $ (1,286) $ 668,505 $ 673,010 Deferred debt issuance costs that were deducted from the carrying amounts of the 2025 Term Loan totaled $1.3 million as of July 29, 2023 and $1.7 million at October 29, 2022. 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 2025 Term Loan. The amortization of deferred debt issuance costs for the 2025 Term Loan is included in interest expense, and was approximately $0.5 million during the first nine months of each of fiscal 2023 and fiscal 2022. The carrying value of the 2025 Term Loan listed above is also net of any unamortized debt discounts. As of July 29, 2023, the estimated fair value of the 2025 Term Loan was $668.8 million. Ciena’s 2025 Term Loan is categorized as Level 2 in the fair value hierarchy. Ciena estimated the fair value of its 2025 Term Loan using a market approach based on observable inputs, such as current market transactions involving comparable securities. 2030 Term Loan On January 19, 2023, Ciena entered into an Incremental Joinder and Amendment Agreement (the “Incremental Agreement”) to its Credit Agreement, dated July 15, 2014, as amended (the “Credit Agreement”), by and among Ciena, the lenders party thereto and Bank of America, N.A., as administrative agent, pursuant to which Ciena incurred a new tranche of senior secured term loans in an aggregate principal amount of $500.0 million and maturing on January 19, 2030 (the “2030 Term Loan”). Net of original issue discount and debt issuance costs, the $492.5 million in proceeds from the 2030 Term Loan are intended to be used for general corporate purposes. The Incremental Agreement amends the Credit Agreement and provides that the 2030 Term Loan will, among other things: • mature on January 19, 2030; • amortize in equal quarterly installments in aggregate amounts equal to 0.25% of the principal amount of the 2030 Term Loan as of January 19, 2023, or $1.25 million, with the balance payable at maturity; • be subject to mandatory prepayment on the same basis as the 2025 Term Loan, including on the occurrence of certain specified events such as asset sales, debt issuances, and receipt of annual Excess Cash Flow (as defined in the Credit Agreement); • bear interest, at Ciena’s election, at a per annum rate equal to (a) SOFR (subject to a floor of 0.00%) plus an applicable margin of 2.50%, or (b) a base rate (subject to a floor of 1.00%) plus an applicable margin of 1.50%; and • be repayable at any time at Ciena’s election, provided that repayment of the 2030 Term Loan with proceeds of certain indebtedness prior to July 19, 2023 will require a prepayment premium of 1.00% of the aggregate principal amount of such prepayment. Except as amended by the Incremental Agreement, the remaining terms of the Credit Agreement remain in full force and effect. The net carrying value of the 2030 Term Loan was comprised of the following as of the date indicated (in thousands): July 29, 2023 Principal Balance Unamortized Discount Deferred Debt Issuance Costs Net Carrying Value 2030 Term Loan $ 498,750 $ (2,308) $ (4,679) $ 491,763 Deferred debt issuance costs that were deducted from the carrying amounts of the 2030 Term Loan totaled $4.7 million as of July 29, 2023. 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 2030 Term Loan. The amortization of deferred debt issuance costs for the 2030 Term Loan is included in interest expense and was $0.4 million during the first nine months of fiscal 2023. The carrying value of the 2030 Term Loan listed above is also net of any unamortized debt discounts. As of July 29, 2023, the estimated fair value of the 2030 Term Loan was $500.0 million. Ciena’s 2030 Term Loan is categorized as Level 2 in the fair value hierarchy. Ciena estimated the fair value of its 2030 Term Loan using a market approach based on observable inputs, such as current market transactions involving comparable securities. Outstanding Senior Notes Payable 2030 Notes On January 18, 2022, Ciena entered into an Indenture among Ciena, as issuer, certain domestic subsidiaries of Ciena, as guarantors, and U.S. Bank National Association, as trustee, pursuant to which Ciena issued $400.0 million in aggregate principal amount of 4.00% senior notes due 2030 (the “2030 Notes”). The net carrying value of the 2030 Notes was comprised of the following as of the dates indicated (in thousands): July 29, 2023 October 29, 2022 Principal Balance Deferred Debt Issuance Costs Net Carrying Value Net Carrying Value 2030 Senior Notes 4.00% fixed-rate $ 400,000 $ (4,438) $ 395,562 $ 395,045 Deferred debt issuance costs that were deducted from the carrying amount of the 2030 Notes totaled $4.4 million as of July 29, 2023 and $5.0 million as of October 29, 2022. 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 2030 Notes. The amortization of deferred debt issuance costs for the 2030 Notes is included in interest expense, and was approximately $0.5 million and $0.4 million during the first nine months of fiscal 2023 and fiscal 2022, respectively . As of July 29, 2023, the estimated fair value of the 2030 Notes was $350.0 million. The 2030 Notes are categorized as Level 2 in the fair value hierarchy. Ciena estimated the fair value of its 2030 Notes using a market approach based on observable inputs, such as current market transactions involving comparable securities.

ABL CREDIT FACILITY

ABL CREDIT FACILITY	9 Months Ended
ABL CREDIT FACILITY	Jul. 29, 2023
Debt Disclosure [Abstract]
ABL CREDIT FACILITY	SHORT-TERM AND LONG-TERM DEBT Outstanding Term Loans Payable 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”). On January 19, 2023, in connection with the Incremental Agreement (as defined below) to the Credit Agreement (as defined below), the Credit Agreement was amended to replace LIBOR with SOFR for the 2025 Term Loan in response to pending impact of FASB Accounting Standards Codification 848, Reference Rate Reform . The net carrying value of the 2025 Term Loan was comprised of the following as of the dates indicated (in thousands): July 29, 2023 October 29, 2022 Principal Balance Unamortized Discount Deferred Debt Issuance Costs Net Carrying Value Net Carrying Value 2025 Term Loan $ 670,478 $ (687) $ (1,286) $ 668,505 $ 673,010 Deferred debt issuance costs that were deducted from the carrying amounts of the 2025 Term Loan totaled $1.3 million as of July 29, 2023 and $1.7 million at October 29, 2022. 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 2025 Term Loan. The amortization of deferred debt issuance costs for the 2025 Term Loan is included in interest expense, and was approximately $0.5 million during the first nine months of each of fiscal 2023 and fiscal 2022. The carrying value of the 2025 Term Loan listed above is also net of any unamortized debt discounts. As of July 29, 2023, the estimated fair value of the 2025 Term Loan was $668.8 million. Ciena’s 2025 Term Loan is categorized as Level 2 in the fair value hierarchy. Ciena estimated the fair value of its 2025 Term Loan using a market approach based on observable inputs, such as current market transactions involving comparable securities. 2030 Term Loan On January 19, 2023, Ciena entered into an Incremental Joinder and Amendment Agreement (the “Incremental Agreement”) to its Credit Agreement, dated July 15, 2014, as amended (the “Credit Agreement”), by and among Ciena, the lenders party thereto and Bank of America, N.A., as administrative agent, pursuant to which Ciena incurred a new tranche of senior secured term loans in an aggregate principal amount of $500.0 million and maturing on January 19, 2030 (the “2030 Term Loan”). Net of original issue discount and debt issuance costs, the $492.5 million in proceeds from the 2030 Term Loan are intended to be used for general corporate purposes. The Incremental Agreement amends the Credit Agreement and provides that the 2030 Term Loan will, among other things: • mature on January 19, 2030; • amortize in equal quarterly installments in aggregate amounts equal to 0.25% of the principal amount of the 2030 Term Loan as of January 19, 2023, or $1.25 million, with the balance payable at maturity; • be subject to mandatory prepayment on the same basis as the 2025 Term Loan, including on the occurrence of certain specified events such as asset sales, debt issuances, and receipt of annual Excess Cash Flow (as defined in the Credit Agreement); • bear interest, at Ciena’s election, at a per annum rate equal to (a) SOFR (subject to a floor of 0.00%) plus an applicable margin of 2.50%, or (b) a base rate (subject to a floor of 1.00%) plus an applicable margin of 1.50%; and • be repayable at any time at Ciena’s election, provided that repayment of the 2030 Term Loan with proceeds of certain indebtedness prior to July 19, 2023 will require a prepayment premium of 1.00% of the aggregate principal amount of such prepayment. Except as amended by the Incremental Agreement, the remaining terms of the Credit Agreement remain in full force and effect. The net carrying value of the 2030 Term Loan was comprised of the following as of the date indicated (in thousands): July 29, 2023 Principal Balance Unamortized Discount Deferred Debt Issuance Costs Net Carrying Value 2030 Term Loan $ 498,750 $ (2,308) $ (4,679) $ 491,763 Deferred debt issuance costs that were deducted from the carrying amounts of the 2030 Term Loan totaled $4.7 million as of July 29, 2023. 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 2030 Term Loan. The amortization of deferred debt issuance costs for the 2030 Term Loan is included in interest expense and was $0.4 million during the first nine months of fiscal 2023. The carrying value of the 2030 Term Loan listed above is also net of any unamortized debt discounts. As of July 29, 2023, the estimated fair value of the 2030 Term Loan was $500.0 million. Ciena’s 2030 Term Loan is categorized as Level 2 in the fair value hierarchy. Ciena estimated the fair value of its 2030 Term Loan using a market approach based on observable inputs, such as current market transactions involving comparable securities. Outstanding Senior Notes Payable 2030 Notes On January 18, 2022, Ciena entered into an Indenture among Ciena, as issuer, certain domestic subsidiaries of Ciena, as guarantors, and U.S. Bank National Association, as trustee, pursuant to which Ciena issued $400.0 million in aggregate principal amount of 4.00% senior notes due 2030 (the “2030 Notes”). The net carrying value of the 2030 Notes was comprised of the following as of the dates indicated (in thousands): July 29, 2023 October 29, 2022 Principal Balance Deferred Debt Issuance Costs Net Carrying Value Net Carrying Value 2030 Senior Notes 4.00% fixed-rate $ 400,000 $ (4,438) $ 395,562 $ 395,045 Deferred debt issuance costs that were deducted from the carrying amount of the 2030 Notes totaled $4.4 million as of July 29, 2023 and $5.0 million as of October 29, 2022. 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 2030 Notes. The amortization of deferred debt issuance costs for the 2030 Notes is included in interest expense, and was approximately $0.5 million and $0.4 million during the first nine months of fiscal 2023 and fiscal 2022, respectively . As of July 29, 2023, the estimated fair value of the 2030 Notes was $350.0 million. The 2030 Notes are categorized as Level 2 in the fair value hierarchy. Ciena estimated the fair value of its 2030 Notes using a market approach based on observable inputs, such as current market transactions involving comparable securities.

ACCUMULATED OTHER COMPREHENSIVE

ACCUMULATED OTHER COMPREHENSIVE INCOME	9 Months Ended
ACCUMULATED OTHER COMPREHENSIVE INCOME	Jul. 29, 2023
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 nine months ended July 29, 2023 (in thousands): Unrealized Gain (Loss) on Available-for-sale Securities Foreign Currency Forward Contracts Interest Rate Swaps Cumulative Total Balance at October 29, 2022 $ (2,965) $ (10,197) $ 9,397 $ (42,880) $ (46,645) Other comprehensive gain before reclassifications 2,075 17,070 11,763 17,981 48,889 Amounts reclassified from AOCI — (7,756) (6,266) — (14,022) Balance at July 29, 2023 $ (890) $ (883) $ 14,894 $ (24,899) $ (11,778) The following table summarizes the changes in AOCI, net of tax, for the nine months ended July 30, 2022 (in thousands): Unrealized Gain (Loss) on Available-for-sale Securities Foreign Currency Forward Contracts Interest Rate Swaps Cumulative Total Balance at October 30, 2021 $ (164) $ 6,216 $ (12,179) $ 6,566 $ 439 Other comprehensive gain (loss) before reclassifications (2,184) (5,207) 2,786 (22,783) (27,388) Amounts reclassified from AOCI — (1,569) 6,639 — 5,070 Balance at July 30, 2022 $ (2,348) $ (560) $ (2,754) $ (16,217) $ (21,879) 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 interest rate swaps designated as cash flow hedges, impacted interest and other income, net, on the Condensed Consolidated Statements of Operations.

EARNINGS_PER SHARE CALCULATION

EARNINGS PER SHARE CALCULATION	9 Months Ended
EARNINGS PER SHARE CALCULATION	Jul. 29, 2023
Earnings Per Share [Abstract]
EARNINGS PER SHARE CALCULATION	EARNINGS PER SHARE CALCULATION Basic net income per common share (“Basic EPS”) is computed using the weighted average number of common shares outstanding. Diluted net income per potential common share (“Diluted EPS”) is computed using the weighted average number of the following, in each case, to the extent that 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. The following table presents the calculation of Basic and Diluted EPS for the periods indicated (in thousands, except per share amounts): Quarter Ended Nine Months Ended July 29, July 30, July 29, July 30, 2023 2022 2023 2022 Net income $ 29,733 $ 10,512 $ 163,628 $ 95,257 Basic weighted average shares outstanding 149,690 149,862 149,472 152,083 Effect of dilutive potential common shares 287 601 395 1,126 Diluted weighted average shares 149,977 150,463 149,867 153,209 Basic EPS $ 0.20 $ 0.07 $ 1.09 $ 0.63 Diluted EPS $ 0.20 $ 0.07 $ 1.09 $ 0.62 Antidilutive employee share-based awards, excluded 3,383 1,640 2,567 1,264

STOCKHOLDERS_ EQUITY

STOCKHOLDERS’ EQUITY	9 Months Ended
STOCKHOLDERS’ EQUITY	Jul. 29, 2023
Equity [Abstract]
STOCKHOLDERS’ EQUITY	STOCKHOLDERS’ EQUITY Stock Repurchase Program On December 9, 2021, Ciena announced that its Board of Directors authorized a program to repurchase up to $1.0 billion of its common stock. During the third quarter of fiscal 2023, Ciena repurchased an additional 1.4 million shares of its common stock for an aggregate purchase price of $61.2 million at an average price of $42.48 per share. As of July 29, 2023, Ciena (i) has repurchased 9.9 million shares for an aggregate purchase price of $561.2 million at an average price of $56.83 per share, and (ii) has an aggregate of $438.8 million authorized and remaining under its stock repurchase program. 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 its common stock to satisfy employee tax withholding obligations due on vesting of stock unit awards. The related purchase price of $29.8 million for the shares of Ciena’s stock repurchased during the first nine months of

SHARE-BASED COMPENSATION EXPENS

SHARE-BASED COMPENSATION EXPENSE	9 Months Ended
SHARE-BASED COMPENSATION EXPENSE	Jul. 29, 2023
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 Nine Months Ended July 29, July 30, July 29, July 30, 2023 2022 2023 2022 Products $ 1,118 $ 1,002 $ 3,324 $ 2,960 Services 2,687 1,940 7,643 5,467 Share-based compensation expense included in cost of goods sold 3,805 2,942 10,967 8,427 Research and development 10,954 8,233 30,919 23,372 Selling and marketing 8,770 8,075 25,949 23,196 General and administrative 9,377 7,579 27,313 22,825 Share-based compensation expense included in operating expense 29,101 23,887 84,181 69,393 Share-based compensation expense capitalized in inventory, net 127 28 257 7 Total share-based compensation expense $ 33,033 $ 26,857 $ 95,405 $ 77,827 As of July 29, 2023, total unrecognized share-based compensation expense was approximately $231.5 million , which relates to unvested stock unit awards and is expected to be recognized over a weighted-average period of 1.45 years. Stock Unit Awards

SEGMENTS AND ENTITY-WIDE DISCLO

SEGMENTS AND ENTITY-WIDE DISCLOSURES	9 Months Ended
SEGMENTS AND ENTITY-WIDE DISCLOSURES	Jul. 29, 2023
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, right-of-use (“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 July 29, 2023, equipment, building, furniture and fixtures, net, totaled $287.5 million, and operating ROU assets totaled $40.5 million both of which support asset groups within Ciena’s four operating segments and unallocated selling and general and administrative activities. As of July 29, 2023, finite-lived intangible assets, goodwill, and maintenance spares are assigned to asset groups within the following segments (in thousands): July 29, 2023 Networking Platforms Platform Software and Services Blue Planet Automation Software and Services Global Services Total Other intangible assets, net $ 198,937 — 20,148 — $ 219,085 Goodwill $ 201,356 156,191 89,049 — $ 446,596 Maintenance spares, net $ — — — 48,165 $ 48,165 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; significant asset impairments and restructuring costs; amortization of intangible assets; acquisition and integration costs; interest and other income, net; interest expense; and provision for income taxes. The table below sets forth Ciena’s segment profit (loss) and the reconciliation to net income for the periods indicated (in thousands): Quarter Ended Nine Months Ended July 29, July 30, July 29, July 30, 2023 2022 2023 2022 Segment profit (loss): Networking Platforms $ 171,380 $ 108,282 $ 588,281 $ 395,176 Platform Software and Services 49,691 39,646 136,028 132,698 Blue Planet Automation Software and Services (12,072) (10,139) (30,044) (17,693) Global Services 50,550 52,965 137,190 158,808 Total segment profit 259,549 190,754 831,455 668,989 Less: Non-performance operating expenses Selling and marketing 118,266 105,880 367,156 344,700 General and administrative 49,349 41,121 151,184 131,191 Significant asset impairments and restructuring costs 4,174 7,692 16,625 20,203 Amortization of intangible assets 9,487 8,919 26,773 26,757 Acquisition and integration costs 59 35 3,474 598 Add: Other non-performance financial items Interest and other income, net 10,187 366 50,711 4,860 Interest expense (24,060) (12,642) (63,819) (33,275) Less: Provision for income taxes 34,608 4,319 89,507 21,868 Net income $ 29,733 $ 10,512 $ 163,628 $ 95,257 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 United States and Canada are reflected as “Other International.” For the periods indicated, Ciena’s geographic distribution of equipment, building, furniture and fixtures, net, and operating ROU assets was as follows (in thousands): July 29, October 29, Canada $ 241,416 $ 226,451 United States 46,936 47,515 Other International 39,585 38,921 Total $ 327,937 $ 312,887

COMMITMENTS AND CONTINGENCIES

COMMITMENTS AND CONTINGENCIES	9 Months Ended
COMMITMENTS AND CONTINGENCIES	Jul. 29, 2023
Commitments and Contingencies Disclosure [Abstract]
COMMITMENTS AND CONTINGENCIES	COMMITMENTS AND CONTINGENCIES 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	9 Months Ended
SUBSEQUENT EVENTS	Jul. 29, 2023
Subsequent Events [Abstract]
SUBSEQUENT EVENTS	SUBSEQUENT EVENTSStock Repurchase ProgramFrom the end of the third quarter of fiscal 2023 through September 1, 2023, Ciena repurchased an additional 0.9 million shares of its common stock, for an aggregate purchase price of $38.8 million at an average price of $41.67 per share, inclusive of repurchases pending settlement. As of September 1, 2023, Ciena has repurchased an aggregate of 10.8 million shares and has an aggregate of $400.0 million of authorized funds remaining under its stock repurchase program.

Pay vs Performance Disclosure

Pay vs Performance Disclosure - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
Pay vs Performance Disclosure - USD ($) $ in Thousands	Jul. 29, 2023	Jul. 30, 2022	Jul. 29, 2023	Jul. 30, 2022
Pay vs Performance Disclosure
Net income	$ 29,733	$ 10,512	$ 163,628	$ 95,257

Insider Trading Arrangements

Insider Trading Arrangements	3 Months Ended
Insider Trading Arrangements	Jul. 29, 2023
Trading Arrangements, by Individual
Rule 10b5-1 Arrangement Adopted	false
Non-Rule 10b5-1 Arrangement Adopted	false
Rule 10b5-1 Arrangement Terminated	false
Non-Rule 10b5-1 Arrangement Terminated	false

SIGNIFICANT ACCOUNTING POLICI_2

SIGNIFICANT ACCOUNTING POLICIES (Policies)	9 Months Ended
SIGNIFICANT ACCOUNTING POLICIES (Policies)	Jul. 29, 2023
Accounting Policies [Abstract]
Newly Issued Accounting Standards - Not Yet Effective	Newly Issued Accounting Standards - Not Yet Effective In October 2021, the Financial Accounting Standards Board (the “FASB”) issued Accounting Standards Update (“ASU”) No. 2021-08 (“ASU 2021-08”), Business Combinations (Topic 805): Accounting for Contract Assets and Contract Liabilities from Contracts with Customers to improve the accounting for acquired revenue contracts with customers in a business combination to address recognition of an acquired contract liability and payment terms and their effect on subsequent revenue recognized by the acquirer. ASU 2021-08 is effective for annual periods beginning after December 15, 2022 on a prospective basis. Early adoption is permitted. Ciena is currently evaluating the impact of this ASU on its condensed consolidated financial statements and related disclosures.

REVENUE (Tables)

REVENUE (Tables)	9 Months Ended
REVENUE (Tables)	Jul. 29, 2023
Revenue from Contract with Customer [Abstract]
Schedule of Disaggregation of Revenue	The tables below set forth Ciena’s disaggregated revenue for the periods indicated (in thousands): Quarter Ended July 29, 2023 Networking Platforms Platform Software and Services Blue Planet Automation Software and Services Global Services Total Product lines: Converged Packet Optical $ 718,997 $ — $ — $ — $ 718,997 Routing and Switching 127,563 — — — 127,563 Platform Software and Services — 78,880 — — 78,880 Blue Planet Automation Software and Services — — 13,167 — 13,167 Maintenance Support and Training — — — 72,887 72,887 Installation and Deployment — — — 46,840 46,840 Consulting and Network Design — — — 9,552 9,552 Total revenue by product line $ 846,560 $ 78,880 $ 13,167 $ 129,279 $ 1,067,886 Timing of revenue recognition: Products and services at a point in time $ 846,560 $ 15,980 $ 2,832 $ 11,886 $ 877,258 Services transferred over time — 62,900 10,335 117,393 190,628 Total revenue by timing of revenue recognition $ 846,560 $ 78,880 $ 13,167 $ 129,279 $ 1,067,886 Quarter Ended July 30, 2022 Networking Platforms Platform Software and Services Blue Planet Automation Software and Services Global Services Total Product lines: Converged Packet Optical $ 563,837 $ — $ — $ — $ 563,837 Routing and Switching 100,741 — — — 100,741 Platform Software and Services — 63,483 — — 63,483 Blue Planet Automation Software and Services — — 17,342 — 17,342 Maintenance Support and Training — — — 72,760 72,760 Installation and Deployment — — — 38,704 38,704 Consulting and Network Design — — — 11,114 11,114 Total revenue by product line $ 664,578 $ 63,483 $ 17,342 $ 122,578 $ 867,981 Timing of revenue recognition: Products and services at a point in time $ 664,578 $ 15,230 $ 4,632 $ 9,408 $ 693,848 Services transferred over time — 48,253 12,710 113,170 174,133 Total revenue by timing of revenue recognition $ 664,578 $ 63,483 $ 17,342 $ 122,578 $ 867,981 Nine Months Ended July 29, 2023 Networking Platforms Platform Software and Services Blue Planet Automation Software and Services Global Services Total Product lines: Converged Packet Optical $ 2,239,180 $ — $ — $ — $ 2,239,180 Routing and Switching 377,378 — — — 377,378 Platform Software and Services — 221,768 — — 221,768 Blue Planet Automation Software and Services — — 49,139 — 49,139 Maintenance Support and Training — — — 213,938 213,938 Installation and Deployment — — — 120,901 120,901 Consulting and Network Design — — — 34,758 34,758 Total revenue by product line $ 2,616,558 $ 221,768 $ 49,139 $ 369,597 $ 3,257,062 Timing of revenue recognition: Products and services at a point in time $ 2,616,558 $ 48,290 $ 14,143 $ 36,553 $ 2,715,544 Services transferred over time — 173,478 34,996 333,044 541,518 Total revenue by timing of revenue recognition $ 2,616,558 $ 221,768 $ 49,139 $ 369,597 $ 3,257,062 Nine months ended July 30, 2022 Networking Platforms Platform Software and Services Blue Planet Automation Software and Services Global Services Total Product lines: Converged Packet Optical $ 1,730,066 $ — $ — $ — $ 1,730,066 Routing and Switching 295,638 — — — 295,638 Platform Software and Services — 205,557 — — 205,557 Blue Planet Automation Software and Services — — 55,334 — 55,334 Maintenance Support and Training — — — 219,270 219,270 Installation and Deployment — — — 120,504 120,504 Consulting and Network Design — — — 35,282 35,282 Total revenue by product line $ 2,025,704 $ 205,557 $ 55,334 $ 375,056 $ 2,661,651 Timing of revenue recognition: Products and services at a point in time $ 2,025,704 $ 66,655 $ 17,442 $ 31,368 $ 2,141,169 Services transferred over time — 138,902 37,892 343,688 520,482 Total revenue by timing of revenue recognition $ 2,025,704 $ 205,557 $ 55,334 $ 375,056 $ 2,661,651 Quarter Ended Nine Months Ended July 29, July 30, July 29, July 30, 2023 2022 2023 2022 Geographic distribution: Americas $ 749,479 $ 617,366 $ 2,308,934 $ 1,913,350 EMEA 152,834 124,185 479,053 420,075 APAC 165,573 126,430 469,075 328,226 Total revenue by geographic distribution $ 1,067,886 $ 867,981 $ 3,257,062 $ 2,661,651 For the periods indicated, the only customers that accounted for at least 10% of Ciena’s revenue were as follows (in thousands): Quarter Ended Nine Months Ended July 29, July 30, July 29, July 30, 2023 2022 2023 2022 Web-scale provider $ 124,897 n/a $ 369,678 n/a AT&T n/a 100,293 $ 357,382 314,358 Verizon n/a 108,495 n/a 273,158 Total $ 124,897 $ 208,788 $ 727,060 $ 587,516 _____________________________________ n/a Denotes revenue representing less than 10% of total revenue for the period
Schedule of Contract Balances	The following table provides information about receivables, contract assets and contract liabilities (deferred revenue) from contracts with customers as of the dates indicated (in thousands): Balance at July 29, 2023 Balance at October 29, 2022 Accounts receivable, net $ 997,373 $ 920,772 Contract assets for unbilled accounts receivable, net $ 142,305 $ 156,039 Deferred revenue $ 259,977 $ 200,235 As of the dates indicated, deferred revenue is comprised of the following (in thousands): July 29, October 29, Products $ 34,102 $ 19,814 Services 225,875 180,421 Total deferred revenue 259,977 200,235 Less current portion (188,104) (137,899) Long-term deferred revenue $ 71,873 $ 62,336

BUSINESS COMBINATIONS (Tables)

BUSINESS COMBINATIONS (Tables)	9 Months Ended
BUSINESS COMBINATIONS (Tables)	Jul. 29, 2023
Business Combination and Asset Acquisition [Abstract]
Schedule of Recognized Identified Assets Acquired and Liabilities Assumed	The following table summarizes the final purchase price allocation related to the acquisitions based on the estimated fair value of the acquired assets and assumed liabilities (in thousands): Amount Cash and cash equivalents $ 14,634 Accounts receivable, net 443 Inventories, net 1,406 Prepaid expenses and other 810 Equipment, furniture and fixtures 1,090 Goodwill 117,997 Developed technology 75,400 In-process technology 89,100 Customer relationships and contracts 18,400 Order backlog 2,480 Deferred tax asset, net (27,782) Accounts payable (420) Accrued liabilities and other short-term obligations (874) Deferred revenue (851) Other long-term obligations (144) Total purchase consideration $ 291,689

SIGNIFICANT ASSET IMPAIRMENT _2

SIGNIFICANT ASSET IMPAIRMENT AND RESTRUCTURING COSTS (Tables)	9 Months Ended
	Jul. 29, 2023
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 the Condensed Consolidated Balance Sheets, for the nine months ended July 29, 2023 (in thousands): Workforce Other restructuring activities Total Balance at October 29, 2022 $ 1,215 $ 4,620 $ 5,835 Charges 4,509 (1) 12,116 (2) 16,625 Cash payments (4,920) (16,736) (21,656) Balance at July 29, 2023 $ 804 $ — $ 804 Current restructuring liabilities $ 804 $ — $ 804 (1) Reflects employee costs associated with workforce reductions during the nine months ended July 29, 2023 as part of a business optimization strategy to improve gross margin, constrain operating expense, and redesign certain business processes. (2) Primarily represents costs related to restructured real estate facilities and the redesign of certain business processes associated with Ciena’s supply chain and distribution structure reorganization. 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 the Condensed Consolidated Balance Sheets for the nine months ended July 30, 2022 (in thousands): Workforce Other restructuring activities Total Balance at October 30, 2021 $ 781 $ — $ 781 Charges 2,224 (1) 13,992 (2) 16,216 Cash payments (2,423) (13,115) (15,538) Balance at July 30, 2022 $ 582 $ 877 $ 1,459 Current restructuring liabilities $ 582 $ 877 $ 1,459 (1) Reflects employee costs associated with workforce reductions during the nine months ended July 30, 2022 as part of a business optimization strategy to improve gross margin, constrain operating expense, and redesign certain business processes. (2) Primarily represents the redesign of certain business processes associated with Ciena’s supply chain and distribution structure reorganization and costs related to restructured real estate facilities.

INTEREST AND OTHER INCOME, NET

INTEREST AND OTHER INCOME, NET (Tables)	9 Months Ended
INTEREST AND OTHER INCOME, NET (Tables)	Jul. 29, 2023
Other Income and Expenses [Abstract]
Schedule of Interest and Other Income, Net	The components of interest and other income, net, are as follows for the periods indicated (in thousands): Quarter Ended Nine Months Ended July 29, July 30, July 29, July 30, 2023 2022 2023 2022 Interest income $ 12,835 $ 2,774 $ 30,365 $ 4,962 Gains (losses) on non-hedge designated foreign currency forward contracts 1,679 (985) (2,885) (2,911) Foreign currency exchange gains (losses) (4,031) (788) (2,927) 2,711 Gain (loss) on cost method equity investments, net (87) — 26,368 4,120 Other (209) (635) (210) (4,022) Interest and other income, net $ 10,187 $ 366 $ 50,711 $ 4,860

CASH EQUIVALENT, SHORT-TERM A_2

CASH EQUIVALENT, SHORT-TERM AND LONG-TERM INVESTMENTS (Tables)	9 Months Ended
	Jul. 29, 2023
Investments, Debt and Equity Securities [Abstract]
Schedule of Available-for-Sale Securities Reconciliation	As of the dates indicated, investments are comprised of the following (in thousands): July 29, 2023 Amortized Cost Gross Unrealized Gross Unrealized Estimated Fair U.S. government obligations $ 94,715 $ 1 $ (976) $ 93,740 Corporate debt securities 63,401 2 (155) 63,248 Time deposits 80,854 1 (12) 80,843 $ 238,970 $ 4 $ (1,143) $ 237,831 Included in cash equivalents $ 74,890 $ — $ — $ 74,890 Included in short-term investments 142,743 4 (904) 141,843 Included in long-term investments 21,337 — (239) 21,098 $ 238,970 $ 4 $ (1,143) $ 237,831 October 29, 2022 Amortized Cost Gross Unrealized Gross Unrealized Estimated Fair U.S. government obligations $ 137,963 $ — $ (3,379) $ 134,584 Corporate debt securities 54,899 1 (405) 54,495 Time deposits 55,889 — (64) 55,825 $ 248,751 $ 1 $ (3,848) $ 244,904 Included in cash equivalents $ 55,530 $ — $ — $ 55,530 Included in short-term investments 156,430 1 (2,442) 153,989 Included in long-term investments 36,791 — (1,406) 35,385 $ 248,751 $ 1 $ (3,848) $ 244,904
Schedule of Legal Maturities of Debt Investments	The following table summarizes the final legal maturities of debt investments as of July 29, 2023 (in thousands): Amortized Estimated Less than one year $ 217,633 $ 216,733 Due in 1-2 years 21,337 21,098 $ 238,970 $ 237,831

FAIR VALUE MEASUREMENTS (Tables

FAIR VALUE MEASUREMENTS (Tables)	9 Months Ended
FAIR VALUE MEASUREMENTS (Tables)	Jul. 29, 2023
Fair Value Disclosures [Abstract]
Schedule of the Fair Value of Assets and Liabilities Recorded on a Recurring Basis	As of the dates indicated, the following tables summarize the assets and liabilities that are recorded at fair value on a recurring basis (in thousands): July 29, 2023 Level 1 Level 2 Level 3 Total Assets: Money market funds $ 767,668 $ — $ — $ 767,668 Bond mutual fund 102,715 — — 102,715 Time deposits 80,843 — — 80,843 Deferred compensation plan assets 12,203 — — 12,203 U.S. government obligations — 93,740 — 93,740 Corporate debt securities — 63,248 — 63,248 Foreign currency forward contracts — 2,574 — 2,574 Interest rate swaps — 19,528 — 19,528 Total assets measured at fair value $ 963,429 $ 179,090 $ — $ 1,142,519 Liabilities: Foreign currency forward contracts $ — $ 4,691 $ — $ 4,691 Interest rate swaps — 32 — 32 Total liabilities measured at fair value $ — $ 4,723 $ — $ 4,723 October 29, 2022 Level 1 Level 2 Level 3 Total Assets: Money market funds $ 639,024 $ — $ — $ 639,024 Bond mutual fund 71,145 — — 71,145 Time deposits 55,825 — — 55,825 Deferred compensation plan assets 12,751 — — 12,751 U.S. government obligations — 134,584 — 134,584 Corporate debt securities — 54,495 — 54,495 Foreign currency forward contracts — 251 — 251 Interest rate swaps — 12,306 — 12,306 Total assets measured at fair value $ 778,745 $ 201,636 $ — $ 980,381 Liabilities: Foreign currency forward contracts $ — $ 15,605 $ — $ 15,605 Total liabilities measured at fair value $ — $ 15,605 $ — $ 15,605
Schedule of Assets and Liabilities as Presented on Ciena's Condensed Consolidated Balance Sheets	As of the dates indicated, the assets and liabilities above are presented on Ciena’s Condensed Consolidated Balance Sheets as follows (in thousands): July 29, 2023 Level 1 Level 2 Level 3 Total Assets: Cash equivalents $ 944,714 $ 559 $ — $ 945,273 Short-term investments 6,512 135,331 — 141,843 Prepaid expenses and other — 2,574 — 2,574 Long-term investments — 21,098 — 21,098 Other long-term assets 12,203 19,528 — 31,731 Total assets measured at fair value $ 963,429 $ 179,090 $ — $ 1,142,519 Liabilities: Accrued liabilities and other short-term obligations $ — $ 4,691 $ — $ 4,691 Other long-term obligations — 32 — 32 Total liabilities measured at fair value $ — $ 4,723 $ — $ 4,723 October 29, 2022 Level 1 Level 2 Level 3 Total Assets: Cash equivalents $ 757,725 $ 7,974 $ — $ 765,699 Short-term investments 8,269 145,720 — 153,989 Prepaid expenses and other — 251 — 251 Long-term investments — 35,385 — 35,385 Other long-term assets 12,751 12,306 — 25,057 Total assets measured at fair value $ 778,745 $ 201,636 $ — $ 980,381 Liabilities: Accrued liabilities and other short-term obligations $ — $ 15,605 $ — $ 15,605 Total liabilities measured at fair value $ — $ 15,605 $ — $ 15,605

INVENTORIES (Tables)

INVENTORIES (Tables)	9 Months Ended
INVENTORIES (Tables)	Jul. 29, 2023
Inventory Disclosure [Abstract]
Schedule of Inventories	As of the dates indicated, inventories are comprised of the following (in thousands): July 29, October 29, Raw materials $ 771,955 $ 664,916 Work-in-process 51,763 18,232 Finished goods 333,544 258,584 Deferred cost of goods sold 77,521 41,084 Gross inventories 1,234,783 982,816 Reserve for inventory excess and obsolescence (42,261) (36,086) Inventories, net $ 1,192,522 $ 946,730

PREPAID EXPENSES AND OTHER (Tab

PREPAID EXPENSES AND OTHER (Tables)	9 Months Ended
PREPAID EXPENSES AND OTHER (Tables)	Jul. 29, 2023
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]
Schedule of Prepaid Expenses and Other	As of the dates indicated, prepaid expenses and other are comprised of the following (in thousands): July 29, October 29, Contract assets for unbilled accounts receivable, net $ 142,305 $ 156,039 Prepaid VAT and other taxes 75,637 63,975 Prepaid expenses 55,997 55,440 Product demonstration equipment, net 41,691 35,929 Capitalized contract acquisition costs 24,349 33,516 Other non-trade receivables 17,734 24,026 Foreign currency forward contracts 2,574 251 Deferred deployment expense 1,405 877 $ 361,692 $ 370,053

INTANGIBLE ASSETS (Tables)

INTANGIBLE ASSETS (Tables)	9 Months Ended
INTANGIBLE ASSETS (Tables)	Jul. 29, 2023
Goodwill and Intangible Assets Disclosure [Abstract]
Schedule of Finite-Lived Intangible Assets	As of the dates indicated, intangible assets are comprised of the following (in thousands): July 29, 2023 October 29, 2022 Gross Accumulated Net Gross Accumulated Net Developed technology $ 503,618 $ (408,090) $ 95,528 $ 428,218 $ (386,300) $ 41,918 In-process technology 89,100 — 89,100 — — — Patents and licenses 8,795 (4,967) 3,828 8,415 (4,228) 4,187 Customer relationships, covenants not to compete, outstanding purchase orders and contracts 411,384 (380,755) 30,629 390,271 (366,859) 23,412 Total intangible assets $ 1,012,897 $ (793,812) $ 219,085 $ 826,904 $ (757,387) $ 69,517
Schedule of Expected Future Amortization of Finite-Lived Intangible Assets	Expected future amortization of intangible assets for the fiscal years indicated is as follows (in thousands): Fiscal Year Amount Remaining fiscal 2023 $ 14,170 2024 39,836 2025 34,635 2026 23,348 2027 15,843 Thereafter 2,153 $ 129,985 (1) (1) Does not include amortization of in-process technology, as estimation of the timing of future amortization expense would be impractical.

GOODWILL (Tables)

GOODWILL (Tables)	9 Months Ended
GOODWILL (Tables)	Jul. 29, 2023
Goodwill and Intangible Assets Disclosure [Abstract]
Schedule of Goodwill	The following table presents the goodwill allocated to Ciena’s operating segments as of July 29, 2023 and October 29, 2022, as well as the changes to goodwill during the first nine months of fiscal 2023 (in thousands): Balance at October 29, 2022 Acquisitions Impairments Translation Balance at July 29, 2023 Platform Software and Services $ 156,191 $ — $ — $ — $ 156,191 Blue Planet Automation Software and Services 89,049 — — — 89,049 Networking Platforms 83,082 117,997 — 277 201,356 Total $ 328,322 $ 117,997 $ — $ 277 $ 446,596

OTHER BALANCE SHEET DETAILS (Ta

OTHER BALANCE SHEET DETAILS (Tables)	9 Months Ended
OTHER BALANCE SHEET DETAILS (Tables)	Jul. 29, 2023
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): July 29, October 29, Compensation, payroll related tax and benefits $ 104,303 $ 126,338 Warranty 49,504 45,503 Income taxes payable 34,577 11,472 Vacation 30,344 26,396 Foreign currency forward contracts 4,691 15,604 Interest payable 9,779 4,793 Finance lease liabilities 4,063 3,758 Other 118,361 126,918 $ 355,622 $ 360,782
Schedule of Accrued Warranties	The following table summarizes the activity in Ciena’s accrued warranty for the periods indicated (in thousands): Beginning Balance Current Period Provisions Settlements Ending Balance Nine Months Ended July 30, 2022 $ 48,019 12,416 (14,746) $ 45,689 Nine Months Ended July 29, 2023 $ 45,503 18,860 (14,859) $ 49,504
Schedule of Contract Balances	The following table provides information about receivables, contract assets and contract liabilities (deferred revenue) from contracts with customers as of the dates indicated (in thousands): Balance at July 29, 2023 Balance at October 29, 2022 Accounts receivable, net $ 997,373 $ 920,772 Contract assets for unbilled accounts receivable, net $ 142,305 $ 156,039 Deferred revenue $ 259,977 $ 200,235 As of the dates indicated, deferred revenue is comprised of the following (in thousands): July 29, October 29, Products $ 34,102 $ 19,814 Services 225,875 180,421 Total deferred revenue 259,977 200,235 Less current portion (188,104) (137,899) Long-term deferred revenue $ 71,873 $ 62,336

SHORT-TERM AND LONG-TERM DEBT (

SHORT-TERM AND LONG-TERM DEBT (Tables)	9 Months Ended
SHORT-TERM AND LONG-TERM DEBT (Tables)	Jul. 29, 2023
Debt Disclosure [Abstract]
Schedule of Carrying Values and Estimated Fair Values of Convertible Notes	The net carrying value of the 2025 Term Loan was comprised of the following as of the dates indicated (in thousands): July 29, 2023 October 29, 2022 Principal Balance Unamortized Discount Deferred Debt Issuance Costs Net Carrying Value Net Carrying Value 2025 Term Loan $ 670,478 $ (687) $ (1,286) $ 668,505 $ 673,010 The net carrying value of the 2030 Term Loan was comprised of the following as of the date indicated (in thousands): July 29, 2023 Principal Balance Unamortized Discount Deferred Debt Issuance Costs Net Carrying Value 2030 Term Loan $ 498,750 $ (2,308) $ (4,679) $ 491,763 The net carrying value of the 2030 Notes was comprised of the following as of the dates indicated (in thousands): July 29, 2023 October 29, 2022 Principal Balance Deferred Debt Issuance Costs Net Carrying Value Net Carrying Value 2030 Senior Notes 4.00% fixed-rate $ 400,000 $ (4,438) $ 395,562 $ 395,045

ACCUMULATED OTHER COMPREHENSI_2

ACCUMULATED OTHER COMPREHENSIVE INCOME (Tables)	9 Months Ended
ACCUMULATED OTHER COMPREHENSIVE INCOME (Tables)	Jul. 29, 2023
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 nine months ended July 29, 2023 (in thousands): Unrealized Gain (Loss) on Available-for-sale Securities Foreign Currency Forward Contracts Interest Rate Swaps Cumulative Total Balance at October 29, 2022 $ (2,965) $ (10,197) $ 9,397 $ (42,880) $ (46,645) Other comprehensive gain before reclassifications 2,075 17,070 11,763 17,981 48,889 Amounts reclassified from AOCI — (7,756) (6,266) — (14,022) Balance at July 29, 2023 $ (890) $ (883) $ 14,894 $ (24,899) $ (11,778) The following table summarizes the changes in AOCI, net of tax, for the nine months ended July 30, 2022 (in thousands): Unrealized Gain (Loss) on Available-for-sale Securities Foreign Currency Forward Contracts Interest Rate Swaps Cumulative Total Balance at October 30, 2021 $ (164) $ 6,216 $ (12,179) $ 6,566 $ 439 Other comprehensive gain (loss) before reclassifications (2,184) (5,207) 2,786 (22,783) (27,388) Amounts reclassified from AOCI — (1,569) 6,639 — 5,070 Balance at July 30, 2022 $ (2,348) $ (560) $ (2,754) $ (16,217) $ (21,879)

EARNINGS_PER SHARE CALCULATION

EARNINGS PER SHARE CALCULATION (Tables)	9 Months Ended
EARNINGS PER SHARE CALCULATION (Tables)	Jul. 29, 2023
Earnings Per Share [Abstract]
Schedule of Reconciliation of Numerator and Denominator of Basic and Diluted Earnings Per Share	The following table presents the calculation of Basic and Diluted EPS for the periods indicated (in thousands, except per share amounts): Quarter Ended Nine Months Ended July 29, July 30, July 29, July 30, 2023 2022 2023 2022 Net income $ 29,733 $ 10,512 $ 163,628 $ 95,257 Basic weighted average shares outstanding 149,690 149,862 149,472 152,083 Effect of dilutive potential common shares 287 601 395 1,126 Diluted weighted average shares 149,977 150,463 149,867 153,209 Basic EPS $ 0.20 $ 0.07 $ 1.09 $ 0.63 Diluted EPS $ 0.20 $ 0.07 $ 1.09 $ 0.62 Antidilutive employee share-based awards, excluded 3,383 1,640 2,567 1,264

SHARE-BASED COMPENSATION EXPE_2

SHARE-BASED COMPENSATION EXPENSE (Tables)	9 Months Ended
SHARE-BASED COMPENSATION EXPENSE (Tables)	Jul. 29, 2023
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 Nine Months Ended July 29, July 30, July 29, July 30, 2023 2022 2023 2022 Products $ 1,118 $ 1,002 $ 3,324 $ 2,960 Services 2,687 1,940 7,643 5,467 Share-based compensation expense included in cost of goods sold 3,805 2,942 10,967 8,427 Research and development 10,954 8,233 30,919 23,372 Selling and marketing 8,770 8,075 25,949 23,196 General and administrative 9,377 7,579 27,313 22,825 Share-based compensation expense included in operating expense 29,101 23,887 84,181 69,393 Share-based compensation expense capitalized in inventory, net 127 28 257 7 Total share-based compensation expense $ 33,033 $ 26,857 $ 95,405 $ 77,827

SEGMENTS AND ENTITY-WIDE DISC_2

SEGMENTS AND ENTITY-WIDE DISCLOSURES (Tables)	9 Months Ended
SEGMENTS AND ENTITY-WIDE DISCLOSURES (Tables)	Jul. 29, 2023
Segment Reporting [Abstract]
Schedule of Reconciliation of Assets From Segment to Consolidated	As of July 29, 2023, finite-lived intangible assets, goodwill, and maintenance spares are assigned to asset groups within the following segments (in thousands): July 29, 2023 Networking Platforms Platform Software and Services Blue Planet Automation Software and Services Global Services Total Other intangible assets, net $ 198,937 — 20,148 — $ 219,085 Goodwill $ 201,356 156,191 89,049 — $ 446,596 Maintenance spares, net $ — — — 48,165 $ 48,165
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 net income for the periods indicated (in thousands): Quarter Ended Nine Months Ended July 29, July 30, July 29, July 30, 2023 2022 2023 2022 Segment profit (loss): Networking Platforms $ 171,380 $ 108,282 $ 588,281 $ 395,176 Platform Software and Services 49,691 39,646 136,028 132,698 Blue Planet Automation Software and Services (12,072) (10,139) (30,044) (17,693) Global Services 50,550 52,965 137,190 158,808 Total segment profit 259,549 190,754 831,455 668,989 Less: Non-performance operating expenses Selling and marketing 118,266 105,880 367,156 344,700 General and administrative 49,349 41,121 151,184 131,191 Significant asset impairments and restructuring costs 4,174 7,692 16,625 20,203 Amortization of intangible assets 9,487 8,919 26,773 26,757 Acquisition and integration costs 59 35 3,474 598 Add: Other non-performance financial items Interest and other income, net 10,187 366 50,711 4,860 Interest expense (24,060) (12,642) (63,819) (33,275) Less: Provision for income taxes 34,608 4,319 89,507 21,868 Net income $ 29,733 $ 10,512 $ 163,628 $ 95,257
Schedule of Ciena's Geographic Distribution of Revenue and Long-Lived Assets	For the periods indicated, Ciena’s geographic distribution of equipment, building, furniture and fixtures, net, and operating ROU assets was as follows (in thousands): July 29, October 29, Canada $ 241,416 $ 226,451 United States 46,936 47,515 Other International 39,585 38,921 Total $ 327,937 $ 312,887

REVENUE - Disaggregation of Rev

REVENUE - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jul. 29, 2023	Jul. 30, 2022	Jul. 29, 2023	Jul. 30, 2022
Disaggregation of Revenue [Line Items]
Total revenue	$ 1,067,886	$ 867,981	$ 3,257,062	$ 2,661,651
Products and services at a point in time
Disaggregation of Revenue [Line Items]
Total revenue	877,258	693,848	2,715,544	2,141,169
Services transferred over time
Disaggregation of Revenue [Line Items]
Total revenue	190,628	174,133	541,518	520,482
Networking Platforms
Disaggregation of Revenue [Line Items]
Total revenue	846,560	664,578	2,616,558	2,025,704
Networking Platforms \| Products and services at a point in time
Disaggregation of Revenue [Line Items]
Total revenue	846,560	664,578	2,616,558	2,025,704
Networking Platforms \| Services transferred over time
Disaggregation of Revenue [Line Items]
Total revenue	0	0	0	0
Platform Software and Services
Disaggregation of Revenue [Line Items]
Total revenue	78,880	63,483	221,768	205,557
Platform Software and Services \| Products and services at a point in time
Disaggregation of Revenue [Line Items]
Total revenue	15,980	15,230	48,290	66,655
Platform Software and Services \| Services transferred over time
Disaggregation of Revenue [Line Items]
Total revenue	62,900	48,253	173,478	138,902
Blue Planet Automation Software and Services
Disaggregation of Revenue [Line Items]
Total revenue	13,167	17,342	49,139	55,334
Blue Planet Automation Software and Services \| Products and services at a point in time
Disaggregation of Revenue [Line Items]
Total revenue	2,832	4,632	14,143	17,442
Blue Planet Automation Software and Services \| Services transferred over time
Disaggregation of Revenue [Line Items]
Total revenue	10,335	12,710	34,996	37,892
Global Services
Disaggregation of Revenue [Line Items]
Total revenue	129,279	122,578	369,597	375,056
Global Services \| Products and services at a point in time
Disaggregation of Revenue [Line Items]
Total revenue	11,886	9,408	36,553	31,368
Global Services \| Services transferred over time
Disaggregation of Revenue [Line Items]
Total revenue	117,393	113,170	333,044	343,688
Converged Packet Optical
Disaggregation of Revenue [Line Items]
Total revenue	718,997	563,837	2,239,180	1,730,066
Converged Packet Optical \| Networking Platforms
Disaggregation of Revenue [Line Items]
Total revenue	718,997	563,837	2,239,180	1,730,066
Converged Packet Optical \| Platform Software and Services
Disaggregation of Revenue [Line Items]
Total revenue	0	0	0	0
Converged Packet Optical \| Blue Planet Automation Software and Services
Disaggregation of Revenue [Line Items]
Total revenue	0	0	0	0
Converged Packet Optical \| Global Services
Disaggregation of Revenue [Line Items]
Total revenue	0	0	0	0
Routing and Switching
Disaggregation of Revenue [Line Items]
Total revenue	127,563	100,741	377,378	295,638
Routing and Switching \| Networking Platforms
Disaggregation of Revenue [Line Items]
Total revenue	127,563	100,741	377,378	295,638
Routing and Switching \| Platform Software and Services
Disaggregation of Revenue [Line Items]
Total revenue	0	0	0	0
Routing and Switching \| Blue Planet Automation Software and Services
Disaggregation of Revenue [Line Items]
Total revenue	0	0	0	0
Routing and Switching \| Global Services
Disaggregation of Revenue [Line Items]
Total revenue	0	0	0	0
Platform Software and Services
Disaggregation of Revenue [Line Items]
Total revenue	78,880	63,483	221,768	205,557
Platform Software and Services \| Networking Platforms
Disaggregation of Revenue [Line Items]
Total revenue	0	0	0	0
Platform Software and Services \| Platform Software and Services
Disaggregation of Revenue [Line Items]
Total revenue	78,880	63,483	221,768	205,557
Platform Software and Services \| Blue Planet Automation Software and Services
Disaggregation of Revenue [Line Items]
Total revenue	0	0	0	0
Platform Software and Services \| Global Services
Disaggregation of Revenue [Line Items]
Total revenue	0	0	0	0
Blue Planet Automation Software and Services
Disaggregation of Revenue [Line Items]
Total revenue	13,167	17,342	49,139	55,334
Blue Planet Automation Software and Services \| Networking Platforms
Disaggregation of Revenue [Line Items]
Total revenue	0	0	0	0
Blue Planet Automation Software and Services \| Platform Software and Services
Disaggregation of Revenue [Line Items]
Total revenue	0	0	0	0
Blue Planet Automation Software and Services \| Blue Planet Automation Software and Services
Disaggregation of Revenue [Line Items]
Total revenue	13,167	17,342	49,139	55,334
Blue Planet Automation Software and Services \| Global Services
Disaggregation of Revenue [Line Items]
Total revenue	0	0	0	0
Maintenance Support and Training
Disaggregation of Revenue [Line Items]
Total revenue	72,887	72,760	213,938	219,270
Maintenance Support and Training \| Networking Platforms
Disaggregation of Revenue [Line Items]
Total revenue	0	0	0	0
Maintenance Support and Training \| Platform Software and Services
Disaggregation of Revenue [Line Items]
Total revenue	0	0	0	0
Maintenance Support and Training \| Blue Planet Automation Software and Services
Disaggregation of Revenue [Line Items]
Total revenue	0	0	0	0
Maintenance Support and Training \| Global Services
Disaggregation of Revenue [Line Items]
Total revenue	72,887	72,760	213,938	219,270
Installation and Deployment
Disaggregation of Revenue [Line Items]
Total revenue	46,840	38,704	120,901	120,504
Installation and Deployment \| Networking Platforms
Disaggregation of Revenue [Line Items]
Total revenue	0	0	0	0
Installation and Deployment \| Platform Software and Services
Disaggregation of Revenue [Line Items]
Total revenue	0	0	0	0
Installation and Deployment \| Blue Planet Automation Software and Services
Disaggregation of Revenue [Line Items]
Total revenue	0	0	0	0
Installation and Deployment \| Global Services
Disaggregation of Revenue [Line Items]
Total revenue	46,840	38,704	120,901	120,504
Consulting and Network Design
Disaggregation of Revenue [Line Items]
Total revenue	9,552	11,114	34,758	35,282
Consulting and Network Design \| Networking Platforms
Disaggregation of Revenue [Line Items]
Total revenue	0	0	0	0
Consulting and Network Design \| Platform Software and Services
Disaggregation of Revenue [Line Items]
Total revenue	0	0	0	0
Consulting and Network Design \| Blue Planet Automation Software and Services
Disaggregation of Revenue [Line Items]
Total revenue	0	0	0	0
Consulting and Network Design \| Global Services
Disaggregation of Revenue [Line Items]
Total revenue	$ 9,552	$ 11,114	$ 34,758	$ 35,282

REVENUE - Geographical Distribu

REVENUE - Geographical Distribution of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jul. 29, 2023	Jul. 30, 2022	Jul. 29, 2023	Jul. 30, 2022
Disaggregation of Revenue [Line Items]
Total revenue	$ 1,067,886	$ 867,981	$ 3,257,062	$ 2,661,651
Revenue \| Customer Concentration Risk \| Web-scale provider
Disaggregation of Revenue [Line Items]
Total revenue	124,897		369,678
Americas
Disaggregation of Revenue [Line Items]
Total revenue	749,479	617,366	2,308,934	1,913,350
EMEA
Disaggregation of Revenue [Line Items]
Total revenue	152,834	124,185	479,053	420,075
APAC
Disaggregation of Revenue [Line Items]
Total revenue	$ 165,573	$ 126,430	$ 469,075	$ 328,226

REVENUE - Narrative (Details)

REVENUE - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
REVENUE - Narrative (Details) - USD ($) $ in Thousands	Jul. 29, 2023	Jul. 30, 2022	Jul. 29, 2023	Jul. 30, 2022	Oct. 29, 2022
Disaggregation of Revenue [Line Items]
Total revenue	$ 1,067,886	$ 867,981	$ 3,257,062	$ 2,661,651
Revenue recognized that was previously deferred			119,800	98,900
Capitalized contract acquisition costs	31,400		31,400		$ 39,700
Amortization of capitalized contract acquisition costs			26,000	20,500
United States
Disaggregation of Revenue [Line Items]
Total revenue	$ 685,800	$ 574,300	$ 2,100,000	$ 1,800,000

REVENUE - Revenue by Major Cust

REVENUE - Revenue by Major Customers (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jul. 29, 2023	Jul. 30, 2022	Jul. 29, 2023	Jul. 30, 2022
Revenue, Major Customer [Line Items]
Total revenue	$ 1,067,886	$ 867,981	$ 3,257,062	$ 2,661,651
Web-scale provider \| Revenue \| Customer Concentration Risk
Revenue, Major Customer [Line Items]
Total revenue	124,897		369,678
AT&T \| Revenue \| Customer Concentration Risk
Revenue, Major Customer [Line Items]
Total revenue		100,293	357,382	314,358
Verizon \| Revenue \| Customer Concentration Risk
Revenue, Major Customer [Line Items]
Total revenue		108,495		273,158
Total \| Revenue \| Customer Concentration Risk
Revenue, Major Customer [Line Items]
Total revenue	$ 124,897	$ 208,788	$ 727,060	$ 587,516

REVENUE - Contract Balances (De

REVENUE - Contract Balances (Details) - USD ($) $ in Thousands	Jul. 29, 2023	Oct. 29, 2022
Revenue from Contract with Customer [Abstract]
Accounts receivable, net	$ 997,373	$ 920,772
Contract assets for unbilled accounts receivable, net	142,305	156,039
Deferred revenue	$ 259,977	$ 200,235

REVENUE - Performance Obligatio

REVENUE - Performance Obligation (Details) $ in Billions	Jul. 29, 2023 USD ($)
Revenue from Contract with Customer [Abstract]
Remaining performance obligation	$ 2.1
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-07-30
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Percentage of remaining performance obligation	84%
Period of remaining performance obligation	12 months

BUSINESS COMBINATIONS - Narrati

BUSINESS COMBINATIONS - Narrative (Details) - USD ($) $ in Thousands		3 Months Ended			9 Months Ended
	Dec. 30, 2022	Jul. 29, 2023	Jan. 28, 2023	Jul. 30, 2022	Jul. 29, 2023	Jul. 30, 2022
Business Acquisition [Line Items]
Gain (loss) on cost method equity investments, net		$ (87)	$ 26,500	$ 0	$ 26,368	$ 4,120
Acquisition and integration costs		$ 59		$ 35	$ 3,474	$ 598
Benu and Tibit
Business Acquisition [Line Items]
Consideration transferred	$ 291,700
Payment to acquire business	244,700
Fair value of previously held cost method equity investment	47,000
Gain (loss) on cost method equity investments, net	26,500
Acquisition and integration costs	$ 3,400
Benu and Tibit \| Developed technology
Business Acquisition [Line Items]
Intangible assets, useful life	5 years
Benu and Tibit \| Customer relationships and contracts
Business Acquisition [Line Items]
Intangible assets, useful life	3 years

BUSINESS COMBINATIONS - Purchas

BUSINESS COMBINATIONS - Purchase Price Allocation (Details) - USD ($) $ in Thousands	Jul. 29, 2023	Dec. 30, 2022	Oct. 29, 2022
Business Acquisition [Line Items]
Goodwill	$ 446,596		$ 328,322
Benu and Tibit
Business Acquisition [Line Items]
Cash and cash equivalents		$ 14,634
Accounts receivable		443
Inventories, net		1,406
Prepaid expenses and other		810
Equipment, furniture and fixtures		1,090
Goodwill		117,997
Deferred tax asset, net		(27,782)
Accounts payable		(420)
Accrued liabilities and other short-term obligations		(874)
Deferred revenue		(851)
Other long-term obligations		(144)
Total purchase consideration		291,689
Benu and Tibit \| Developed technology
Business Acquisition [Line Items]
Intangible assets		75,400
Benu and Tibit \| In-process technology
Business Acquisition [Line Items]
Intangible assets		89,100
Benu and Tibit \| Customer relationships and contracts
Business Acquisition [Line Items]
Intangible assets		18,400
Benu and Tibit \| Order backlog
Business Acquisition [Line Items]
Intangible assets		$ 2,480

SIGNIFICANT ASSET IMPAIRMENT _3

SIGNIFICANT ASSET IMPAIRMENT AND RESTRUCTURING COSTS - Schedule of Restructuring Liabilities (Details) - USD ($) $ in Thousands	9 Months Ended
	Jul. 29, 2023	Jul. 30, 2022
Restructuring Reserve [Roll Forward]
Balance at beginning of period	$ 5,835	$ 781
Charges	16,625	16,216
Cash payments	(21,656)	(15,538)
Balance at end of period	804	1,459
Current restructuring liabilities	804	1,459
Workforce reduction
Restructuring Reserve [Roll Forward]
Balance at beginning of period	1,215	781
Charges	4,509	2,224
Cash payments	(4,920)	(2,423)
Balance at end of period	804	582
Current restructuring liabilities	804	582
Other restructuring activities
Restructuring Reserve [Roll Forward]
Balance at beginning of period	4,620	0
Charges	12,116	13,992
Cash payments	(16,736)	(13,115)
Balance at end of period	0	877
Current restructuring liabilities	$ 0	$ 877

INTEREST AND OTHER INCOME, NE_2

INTEREST AND OTHER INCOME, NET (Details) - USD ($) $ in Thousands	3 Months Ended			9 Months Ended
	Jul. 29, 2023	Jan. 28, 2023	Jul. 30, 2022	Jul. 29, 2023	Jul. 30, 2022
Other Income and Expenses [Abstract]
Interest income	$ 12,835		$ 2,774	$ 30,365	$ 4,962
Gains (losses) on non-hedge designated foreign currency forward contracts	1,679		(985)	(2,885)	(2,911)
Foreign currency exchange gains (losses)	(4,031)		(788)	(2,927)	2,711
Gain (loss) on cost method equity investments, net	(87)	$ 26,500	0	26,368	4,120
Other	(209)		(635)	(210)	(4,022)
Interest and other income, net	$ 10,187		$ 366	$ 50,711	$ 4,860

CASH EQUIVALENT, SHORT-TERM A_3

CASH EQUIVALENT, SHORT-TERM AND LONG-TERM INVESTMENTS - Schedule of Short-term and Long-term Investments (Details) - USD ($) $ in Thousands	Jul. 29, 2023	Oct. 29, 2022
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	$ 238,970	$ 248,751
Gross Unrealized Gains	4	1
Gross Unrealized Losses	(1,143)	(3,848)
Estimated Fair Value	237,831	244,904
Included in cash equivalents
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	74,890	55,530
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	0
Estimated Fair Value	74,890	55,530
Included in short-term investments
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	142,743	156,430
Gross Unrealized Gains	4	1
Gross Unrealized Losses	(904)	(2,442)
Estimated Fair Value	141,843	153,989
Included in long-term investments
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	21,337	36,791
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(239)	(1,406)
Estimated Fair Value	21,098	35,385
U.S. government obligations
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	94,715	137,963
Gross Unrealized Gains	1	0
Gross Unrealized Losses	(976)	(3,379)
Estimated Fair Value	93,740	134,584
Corporate debt securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	63,401	54,899
Gross Unrealized Gains	2	1
Gross Unrealized Losses	(155)	(405)
Estimated Fair Value	63,248	54,495
Time deposits
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	80,854	55,889
Gross Unrealized Gains	1	0
Gross Unrealized Losses	(12)	(64)
Estimated Fair Value	$ 80,843	$ 55,825

CASH EQUIVALENT, SHORT-TERM A_4

CASH EQUIVALENT, SHORT-TERM AND LONG-TERM INVESTMENTS - Legal Maturities of Debt Investments (Details) - USD ($) $ in Thousands	Jul. 29, 2023	Oct. 29, 2022
Amortized Cost
Less than one year	$ 217,633
Due in 1-2 years	21,337
Amortized Cost	238,970	$ 248,751
Estimated Fair Value
Less than one year	216,733
Due in 1-2 years	21,098
Estimated Fair Value	$ 237,831	$ 244,904

FAIR VALUE MEASUREMENTS - Fair

FAIR VALUE MEASUREMENTS - Fair Value Measurements (Details) - USD ($) $ in Thousands	Jul. 29, 2023	Oct. 29, 2022
Assets:
Estimated Fair Value	$ 237,831	$ 244,904
Corporate debt securities
Assets:
Estimated Fair Value	63,248	54,495
Fair value, Measurements, Recurring
Assets:
Deferred compensation plan assets	12,203	12,751
Total assets measured at fair value	1,142,519	980,381
Liabilities:
Total liabilities measured at fair value	4,723	15,605
Fair value, Measurements, Recurring \| Foreign Currency Forward Contracts
Assets:
Foreign currency forward contracts	2,574	251
Liabilities:
Derivative liability	4,691	15,605
Fair value, Measurements, Recurring \| Interest rate swaps
Assets:
Foreign currency forward contracts	19,528	12,306
Liabilities:
Derivative liability	32
Fair value, Measurements, Recurring \| Bond mutual fund
Assets:
Estimated Fair Value	102,715	71,145
Fair value, Measurements, Recurring \| U.S. government obligations
Assets:
Estimated Fair Value	93,740	134,584
Fair value, Measurements, Recurring \| Corporate debt securities
Assets:
Estimated Fair Value	63,248	54,495
Level 1 \| Fair value, Measurements, Recurring
Assets:
Deferred compensation plan assets	12,203	12,751
Total assets measured at fair value	963,429	778,745
Liabilities:
Total liabilities measured at fair value	0	0
Level 1 \| Fair value, Measurements, Recurring \| Foreign Currency Forward Contracts
Assets:
Foreign currency forward contracts	0	0
Liabilities:
Derivative liability	0	0
Level 1 \| Fair value, Measurements, Recurring \| Interest rate swaps
Assets:
Foreign currency forward contracts	0	0
Liabilities:
Derivative liability	0
Level 1 \| Fair value, Measurements, Recurring \| Bond mutual fund
Assets:
Estimated Fair Value	102,715	71,145
Level 1 \| Fair value, Measurements, Recurring \| U.S. government obligations
Assets:
Estimated Fair Value	0	0
Level 1 \| Fair value, Measurements, Recurring \| Corporate debt securities
Assets:
Estimated Fair Value	0	0
Level 2 \| Fair value, Measurements, Recurring
Assets:
Deferred compensation plan assets	0	0
Total assets measured at fair value	179,090	201,636
Liabilities:
Total liabilities measured at fair value	4,723	15,605
Level 2 \| Fair value, Measurements, Recurring \| Foreign Currency Forward Contracts
Assets:
Foreign currency forward contracts	2,574	251
Liabilities:
Derivative liability	4,691	15,605
Level 2 \| Fair value, Measurements, Recurring \| Interest rate swaps
Assets:
Foreign currency forward contracts	19,528	12,306
Liabilities:
Derivative liability	32
Level 2 \| Fair value, Measurements, Recurring \| Bond mutual fund
Assets:
Estimated Fair Value	0	0
Level 2 \| Fair value, Measurements, Recurring \| U.S. government obligations
Assets:
Estimated Fair Value	93,740	134,584
Level 2 \| Fair value, Measurements, Recurring \| Corporate debt securities
Assets:
Estimated Fair Value	63,248	54,495
Level 3 \| Fair value, Measurements, Recurring
Assets:
Deferred compensation plan assets	0	0
Total assets measured at fair value	0	0
Liabilities:
Total liabilities measured at fair value	0	0
Level 3 \| Fair value, Measurements, Recurring \| Foreign Currency Forward Contracts
Assets:
Foreign currency forward contracts	0	0
Liabilities:
Derivative liability	0	0
Level 3 \| Fair value, Measurements, Recurring \| Interest rate swaps
Assets:
Foreign currency forward contracts	0	0
Liabilities:
Derivative liability	0
Level 3 \| Fair value, Measurements, Recurring \| Bond mutual fund
Assets:
Estimated Fair Value	0	0
Level 3 \| Fair value, Measurements, Recurring \| U.S. government obligations
Assets:
Estimated Fair Value	0	0
Level 3 \| Fair value, Measurements, Recurring \| Corporate debt securities
Assets:
Estimated Fair Value	0	0
Money market funds \| Fair value, Measurements, Recurring
Assets:
Cash equivalents	767,668	639,024
Money market funds \| Level 1 \| Fair value, Measurements, Recurring
Assets:
Cash equivalents	767,668	639,024
Money market funds \| Level 2 \| Fair value, Measurements, Recurring
Assets:
Cash equivalents	0	0
Money market funds \| Level 3 \| Fair value, Measurements, Recurring
Assets:
Cash equivalents	0	0
Time deposits \| Fair value, Measurements, Recurring
Assets:
Cash equivalents	80,843	55,825
Time deposits \| Level 1 \| Fair value, Measurements, Recurring
Assets:
Cash equivalents	80,843	55,825
Time deposits \| Level 2 \| Fair value, Measurements, Recurring
Assets:
Cash equivalents	0	0
Time deposits \| Level 3 \| Fair value, Measurements, Recurring
Assets:
Cash equivalents	$ 0	$ 0

FAIR VALUE MEASUREMENTS - Conde

FAIR VALUE MEASUREMENTS - Condensed Consolidated Balance Sheet (Details) - Fair value, Measurements, Recurring - USD ($) $ in Thousands	Jul. 29, 2023	Oct. 29, 2022
Assets:
Total assets measured at fair value	$ 1,142,519	$ 980,381
Liabilities:
Total liabilities measured at fair value	4,723	15,605
Level 1
Assets:
Total assets measured at fair value	963,429	778,745
Liabilities:
Total liabilities measured at fair value	0	0
Level 2
Assets:
Total assets measured at fair value	179,090	201,636
Liabilities:
Total liabilities measured at fair value	4,723	15,605
Level 3
Assets:
Total assets measured at fair value	0	0
Liabilities:
Total liabilities measured at fair value	0	0
Included in cash equivalents
Assets:
Cash equivalents	945,273	765,699
Included in cash equivalents \| Level 1
Assets:
Cash equivalents	944,714	757,725
Included in cash equivalents \| Level 2
Assets:
Cash equivalents	559	7,974
Included in cash equivalents \| Level 3
Assets:
Cash equivalents	0	0
Included in short-term investments
Assets:
Short-term investments	141,843	153,989
Included in short-term investments \| Level 1
Assets:
Short-term investments	6,512	8,269
Included in short-term investments \| Level 2
Assets:
Short-term investments	135,331	145,720
Included in short-term investments \| Level 3
Assets:
Short-term investments	0	0
Prepaid expenses and other
Assets:
Other assets	2,574	251
Prepaid expenses and other \| Level 1
Assets:
Other assets	0	0
Prepaid expenses and other \| Level 2
Assets:
Other assets	2,574	251
Prepaid expenses and other \| Level 3
Assets:
Other assets	0	0
Long-term investments
Assets:
Long-term investments	21,098	35,385
Long-term investments \| Level 1
Assets:
Long-term investments	0	0
Long-term investments \| Level 2
Assets:
Long-term investments	21,098	35,385
Long-term investments \| Level 3
Assets:
Long-term investments	0	0
Other long-term assets
Assets:
Other assets	31,731	25,057
Other long-term assets \| Level 1
Assets:
Other assets	12,203	12,751
Other long-term assets \| Level 2
Assets:
Other assets	19,528	12,306
Other long-term assets \| Level 3
Assets:
Other assets	0	0
Accrued liabilities and other short-term obligations
Liabilities:
Accrued liabilities and other short-term obligations	4,691	15,605
Accrued liabilities and other short-term obligations \| Level 1
Liabilities:
Accrued liabilities and other short-term obligations	0	0
Accrued liabilities and other short-term obligations \| Level 2
Liabilities:
Accrued liabilities and other short-term obligations	4,691	15,605
Accrued liabilities and other short-term obligations \| Level 3
Liabilities:
Accrued liabilities and other short-term obligations	0	$ 0
Other long-term obligations
Liabilities:
Other long-term obligations	32
Other long-term obligations \| Level 1
Liabilities:
Other long-term obligations	0
Other long-term obligations \| Level 2
Liabilities:
Other long-term obligations	32
Other long-term obligations \| Level 3
Liabilities:
Other long-term obligations	$ 0

INVENTORIES (Details)

INVENTORIES (Details) - USD ($) $ in Thousands	9 Months Ended
INVENTORIES (Details) - USD ($) $ in Thousands	Jul. 29, 2023	Jul. 30, 2022	Oct. 29, 2022
Inventory Disclosure [Abstract]
Raw materials	$ 771,955		$ 664,916
Work-in-process	51,763		18,232
Finished goods	333,544		258,584
Deferred cost of goods sold	77,521		41,084
Gross inventories	1,234,783		982,816
Reserve for inventory excess and obsolescence	(42,261)		(36,086)
Inventories, net	1,192,522		$ 946,730
Provision for inventory excess and obsolescence	$ 18,767	$ 12,038

PREPAID EXPENSES AND OTHER (Det

PREPAID EXPENSES AND OTHER (Details) - USD ($) $ in Thousands	9 Months Ended
	Jul. 29, 2023	Jul. 30, 2022	Oct. 29, 2022
Capitalized Contract Cost [Line Items]
Prepaid VAT and other taxes	$ 75,637		$ 63,975
Prepaid expenses	55,997		55,440
Product demonstration equipment, net	41,691		35,929
Other non-trade receivables	17,734		24,026
Foreign currency forward contracts	2,574		251
Deferred deployment expense	1,405		877
Prepaid expenses and other	361,692		370,053
Depreciation of product demonstration equipment	5,900	$ 6,800
Contract assets for unbilled accounts receivable, net
Capitalized Contract Cost [Line Items]
Contract assets	142,305		156,039
Capitalized contract acquisition costs
Capitalized Contract Cost [Line Items]
Contract assets	$ 24,349		$ 33,516

INTANGIBLE ASSETS - Schedule of

INTANGIBLE ASSETS - Schedule of Finite-Lived Intangible Assets (Details) - USD ($) $ in Thousands	Jul. 29, 2023	Oct. 29, 2022
Finite-Lived Intangible Assets [Line Items]
Gross Intangible	$ 1,012,897	$ 826,904
Accumulated Amortization	(793,812)	(757,387)
Net Intangible	219,085	69,517
Developed technology
Finite-Lived Intangible Assets [Line Items]
Gross Intangible	503,618	428,218
Accumulated Amortization	(408,090)	(386,300)
Net Intangible	95,528	41,918
In-process technology
Finite-Lived Intangible Assets [Line Items]
Gross Intangible	89,100	0
Accumulated Amortization	0	0
Net Intangible	89,100	0
Patents and licenses
Finite-Lived Intangible Assets [Line Items]
Gross Intangible	8,795	8,415
Accumulated Amortization	(4,967)	(4,228)
Net Intangible	3,828	4,187
Customer relationships, covenants not to compete, outstanding purchase orders and contracts
Finite-Lived Intangible Assets [Line Items]
Gross Intangible	411,384	390,271
Accumulated Amortization	(380,755)	(366,859)
Net Intangible	$ 30,629	$ 23,412

INTANGIBLE ASSETS - Narrative (

INTANGIBLE ASSETS - Narrative (Details) - USD ($) $ in Thousands	9 Months Ended
	Jul. 29, 2023	Jul. 30, 2022
Goodwill and Intangible Assets Disclosure [Abstract]
Amortization of intangible assets	$ 36,274	$ 36,521

INTANGIBLE ASSETS - Schedule _2

INTANGIBLE ASSETS - Schedule of Expected Future Amortization of Finite-Lived Intangible Assets (Details) - USD ($) $ in Thousands	Jul. 29, 2023	Oct. 29, 2022
Finite-Lived Intangible Assets [Line Items]
Net Intangible	$ 219,085	$ 69,517
Intangible Assets, Excluding In-Process Research And Development
Finite-Lived Intangible Assets [Line Items]
Remaining fiscal 2023	14,170
2024	39,836
2025	34,635
2026	23,348
2027	15,843
Thereafter	2,153
Net Intangible	$ 129,985

GOODWILL (Details)

GOODWILL (Details) $ in Thousands	9 Months Ended
GOODWILL (Details) $ in Thousands	Jul. 29, 2023 USD ($)
Goodwill [Roll Forward]
Goodwill beginning balance	$ 328,322
Acquisitions	117,997
Impairments	0
Translation	277
Goodwill ending balance	446,596
Platform Software and Services
Goodwill [Roll Forward]
Goodwill beginning balance	156,191
Acquisitions	0
Impairments	0
Translation	0
Goodwill ending balance	156,191
Blue Planet Automation Software and Services
Goodwill [Roll Forward]
Goodwill beginning balance	89,049
Acquisitions	0
Impairments	0
Translation	0
Goodwill ending balance	89,049
Networking Platforms
Goodwill [Roll Forward]
Goodwill beginning balance	83,082
Acquisitions	117,997
Impairments	0
Translation	277
Goodwill ending balance	$ 201,356

OTHER BALANCE SHEET DETAILS - A

OTHER BALANCE SHEET DETAILS - Accrued Liabilities and Other Short-term Obligations (Details) - USD ($) $ in Thousands	Jul. 29, 2023	Oct. 29, 2022	Jul. 30, 2022	Oct. 30, 2021
Balance Sheet Related Disclosures [Abstract]
Compensation, payroll related tax and benefits	$ 104,303	$ 126,338
Warranty	49,504	45,503	$ 45,689	$ 48,019
Income taxes payable	34,577	11,472
Vacation	30,344	26,396
Foreign currency forward contracts	4,691	15,604
Interest payable	9,779	4,793
Finance lease liabilities	4,063	3,758
Other	118,361	126,918
Accrued liabilities and other short-term obligations	$ 355,622	$ 360,782
Derivative Liability, Current, Statement of Financial Position [Extensible Enumeration]	Accrued liabilities and other short-term obligations	Accrued liabilities and other short-term obligations

OTHER BALANCE SHEET DETAILS -_2

OTHER BALANCE SHEET DETAILS - Accrued Warranty (Details) - USD ($) $ in Thousands	9 Months Ended
	Jul. 29, 2023	Jul. 30, 2022
Movement in Standard Product Warranty Accrual [Roll Forward]
Beginning Balance	$ 45,503	$ 48,019
Current Period Provisions	18,860	12,416
Settlements	(14,859)	(14,746)
Ending Balance	$ 49,504	$ 45,689

OTHER BALANCE SHEET DETAILS - D

OTHER BALANCE SHEET DETAILS - Deferred Revenue (Details) - USD ($) $ in Thousands	Jul. 29, 2023	Oct. 29, 2022
Disaggregation of Revenue [Line Items]
Total deferred revenue	$ 259,977	$ 200,235
Less current portion	(188,104)	(137,899)
Long-term deferred revenue	71,873	62,336
Products
Disaggregation of Revenue [Line Items]
Total deferred revenue	34,102	19,814
Services
Disaggregation of Revenue [Line Items]
Total deferred revenue	$ 225,875	$ 180,421

DERIVATIVE INSTRUMENTS (Details

DERIVATIVE INSTRUMENTS (Details) - USD ($) $ in Millions	9 Months Ended
DERIVATIVE INSTRUMENTS (Details) - USD ($) $ in Millions	Jul. 29, 2023	Jan. 31, 2023	Oct. 29, 2022
Foreign Currency Forward Contracts \| Not Designated as Hedging Instrument
Derivative [Line Items]
Derivative asset, notional amount	$ 255.9		$ 108
Derivative maturity (in months)	12 months
Foreign Currency Forward Contracts \| Cash Flow Hedging \| Designated as Hedging Instrument
Derivative [Line Items]
Derivative asset, notional amount	$ 291.4		272.2
Derivative maturity (in months)	24 months
Foreign Currency Forward Contracts \| Net Investment Hedges \| Designated as Hedging Instrument \| INDIA
Derivative [Line Items]
Derivative asset, notional amount	$ 48.6
Derivative maturity (in months)	24 months
Interest Rate Swaps \| Cash Flow Hedging \| Designated as Hedging Instrument \| Secured Debt \| 2025 Term Loan
Derivative [Line Items]
Derivative asset, notional amount	$ 350	$ 350	$ 350
Derivative, fixed interest rate	2.957%	2.883%
Interest Rate Swaps \| Cash Flow Hedging \| Designated as Hedging Instrument \| Secured Debt \| 2025 Term Loan \| SOFR
Derivative [Line Items]
Derivative asset, notional amount	$ 350
Derivative, fixed interest rate	2.968%
Interest Rate Swaps \| Cash Flow Hedging \| Designated as Hedging Instrument \| Secured Debt \| Term loan 2030
Derivative [Line Items]
Derivative asset, notional amount	$ 350	$ 350
Derivative, fixed interest rate		3.47%

SHORT-TERM AND LONG-TERM DEBT -

SHORT-TERM AND LONG-TERM DEBT - Narrative (Details) - USD ($) $ in Thousands		9 Months Ended
	Jan. 19, 2023	Jul. 29, 2023	Jul. 30, 2022	Oct. 29, 2022	Jan. 18, 2022	Jan. 23, 2020
2025 Term Loan \| Secured Debt
Debt Instrument [Line Items]
Principal Balance		$ 670,478				$ 693,000
Deferred debt issuance costs		1,286		$ 1,700
Amortization of debt issuance costs		500	$ 500
Fair value of debt		668,800
Term loan 2030
Debt Instrument [Line Items]
Principal Balance	$ 1,250
Debt instrument, face amount	500,000
Proceeds from issuance of debt	$ 492,500
Debt instrument, redemption price, percentage	0.25%
Deferred Debt Issuance Costs		500,000
Term loan 2030 \| Minimum
Debt Instrument [Line Items]
Basis spread on variable rate	1%
Term loan 2030 \| Minimum \| SOFR
Debt Instrument [Line Items]
Basis spread on variable rate	0%
Term loan 2030 \| Maximum
Debt Instrument [Line Items]
Basis spread on variable rate	1.50%
Term loan 2030 \| Maximum \| SOFR
Debt Instrument [Line Items]
Basis spread on variable rate	2.50%
Term loan 2030 \| Secured Debt
Debt Instrument [Line Items]
Principal Balance		498,750
Deferred debt issuance costs		4,679
Amortization of debt issuance costs		400
Term loan 2030 \| Senior Notes
Debt Instrument [Line Items]
Debt instrument, interest rate, stated percentage	1%
Deferred Debt Issuance Costs		4,700
2030 Senior Notes 4.00% fixed-rate
Debt Instrument [Line Items]
Deferred Debt Issuance Costs		350,000
2030 Senior Notes 4.00% fixed-rate \| Secured Debt
Debt Instrument [Line Items]
Principal Balance		400,000
Deferred debt issuance costs		4,438
2030 Senior Notes 4.00% fixed-rate \| Senior Notes
Debt Instrument [Line Items]
Amortization of debt issuance costs		$ 500	$ 400
Debt instrument, face amount					$ 400,000
Debt instrument, interest rate, stated percentage		4%			4%
Deferred Debt Issuance Costs		$ 4,400		$ 5,000

SHORT-TERM AND LONG-TERM DEBT_2

SHORT-TERM AND LONG-TERM DEBT - Net Carrying Values of Term Loans (Details) - USD ($) $ in Thousands	Jul. 29, 2023	Jan. 19, 2023	Oct. 29, 2022	Jan. 18, 2022	Jan. 23, 2020
2025 Term Loan \| Secured Debt
Debt Instrument [Line Items]
Principal Balance	$ 670,478				$ 693,000
Unamortized Discount	(687)
Deferred Debt Issuance Costs	(1,286)		$ (1,700)
Net Carrying Value	668,505		673,010
Term loan 2030
Debt Instrument [Line Items]
Principal Balance		$ 1,250
Term loan 2030 \| Secured Debt
Debt Instrument [Line Items]
Principal Balance	498,750
Unamortized Discount	(2,308)
Deferred Debt Issuance Costs	(4,679)
Net Carrying Value	491,763
Term loan 2030 \| Senior Notes
Debt Instrument [Line Items]
Debt instrument, interest rate, stated percentage		1%
2030 Senior Notes 4.00% fixed-rate \| Secured Debt
Debt Instrument [Line Items]
Principal Balance	400,000
Deferred Debt Issuance Costs	(4,438)
Net Carrying Value	$ 395,562		$ 395,045
2030 Senior Notes 4.00% fixed-rate \| Senior Notes
Debt Instrument [Line Items]
Debt instrument, interest rate, stated percentage	4%			4%

ABL CREDIT FACILITY (Details)

ABL CREDIT FACILITY (Details) $ in Millions	Feb. 10, 2023 USD ($)
Revolving Credit Facility
Line of Credit Facility [Line Items]
Current borrowing capacity	$ 300

ACCUMULATED OTHER COMPREHENSI_3

ACCUMULATED OTHER COMPREHENSIVE INCOME (Details) - USD ($) $ in Thousands	9 Months Ended
	Jul. 29, 2023	Jul. 30, 2022
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Equity - beginning balance	$ 2,712,861	$ 3,020,018
Other comprehensive gain before reclassifications	48,889	(27,388)
Amounts reclassified from AOCI	(14,022)	5,070
Equity- ending balance	2,947,007	2,667,736
Accumulated Other Comprehensive Income (Loss)
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Equity - beginning balance	(46,645)	439
Equity- ending balance	(11,778)	(21,879)
Available-for-sale Securities
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Equity - beginning balance	(2,965)	(164)
Other comprehensive gain before reclassifications	2,075	(2,184)
Amounts reclassified from AOCI	0	0
Equity- ending balance	(890)	(2,348)
Unrealized Gain (Loss) Derivatives \| Foreign Currency Forward Contracts
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Equity - beginning balance	(10,197)	6,216
Other comprehensive gain before reclassifications	17,070	(5,207)
Amounts reclassified from AOCI	(7,756)	(1,569)
Equity- ending balance	(883)	(560)
Unrealized Gain (Loss) Derivatives \| Interest Rate Swaps
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Equity - beginning balance	9,397	(12,179)
Other comprehensive gain before reclassifications	11,763	2,786
Amounts reclassified from AOCI	(6,266)	6,639
Equity- ending balance	14,894	(2,754)
Cumulative Translation Adjustment
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Equity - beginning balance	(42,880)	6,566
Other comprehensive gain before reclassifications	17,981	(22,783)
Amounts reclassified from AOCI	0	0
Equity- ending balance	$ (24,899)	$ (16,217)

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		9 Months Ended
	Jul. 29, 2023	Jul. 30, 2022	Jul. 29, 2023	Jul. 30, 2022
Earnings Per Share [Abstract]
Net income	$ 29,733	$ 10,512	$ 163,628	$ 95,257
Basic weighted average shares outstanding (in shares)	149,690	149,862	149,472	152,083
Effect of dilutive potential common shares (in shares)	287	601	395	1,126
Dilutive weighted average shares (in shares)	149,977	150,463	149,867	153,209
Basic EPS (in dollars per share)	$ 0.20	$ 0.07	$ 1.09	$ 0.63
Diluted EPS (in dollars per share)	$ 0.20	$ 0.07	$ 1.09	$ 0.62
Antidilutive employee share-based awards, excluded (in shares)	3,383	1,640	2,567	1,264

STOCKHOLDERS_ EQUITY (Details)

STOCKHOLDERS’ EQUITY (Details) - USD ($) $ / shares in Units, $ in Thousands, shares in Millions	3 Months Ended	9 Months Ended
	Jul. 29, 2023	Jul. 29, 2023	Jul. 30, 2022	Dec. 09, 2021
Equity [Abstract]
Stock repurchase program authorized amount				$ 1,000,000
Repurchase of common stock under the stock repurchase program (in shares)	1.4
Repurchase of common stock under the stock repurchase program (in shares)	$ 61,200
Repurchase of common stock under the stock repurchase program (in dollars per share)	$ 42.48
Aggregate shares repurchased (in shares)	9.9	9.9
Aggregate shares repurchased	$ 561,200	$ 561,200
Aggregate average price of shares repurchased (in dollars per share)	$ 56.83	$ 56.83
Authorized funds remaining under stock repurchase program	$ 438,800	$ 438,800
Shares repurchased for tax withholdings on vesting of restricted stock units		$ 29,794	$ 41,280

SHARE-BASED COMPENSATION EXPE_3

SHARE-BASED COMPENSATION EXPENSE - Schedule of Share-Based Compensation Expense (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jul. 29, 2023	Jul. 30, 2022	Jul. 29, 2023	Jul. 30, 2022
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Share-based compensation expense capitalized in inventory, net	$ 127	$ 28	$ 257	$ 7
Total share-based compensation expense	33,033	26,857	95,405	77,827
Share-based compensation expense included in cost of goods sold
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Share-based compensation expense included in operating expense	3,805	2,942	10,967	8,427
Products
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Share-based compensation expense included in operating expense	1,118	1,002	3,324	2,960
Services
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Share-based compensation expense included in operating expense	2,687	1,940	7,643	5,467
Share-based compensation expense included in operating expense
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Share-based compensation expense included in operating expense	29,101	23,887	84,181	69,393
Research and development
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Share-based compensation expense included in operating expense	10,954	8,233	30,919	23,372
Selling and marketing
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Share-based compensation expense included in operating expense	8,770	8,075	25,949	23,196
General and administrative
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Share-based compensation expense included in operating expense	$ 9,377	$ 7,579	$ 27,313	$ 22,825

SHARE-BASED COMPENSATION EXPE_4

SHARE-BASED COMPENSATION EXPENSE - Narrative (Details) - Restricted Stock Units (RSUs) - USD ($) $ in Millions	1 Months Ended	9 Months Ended
	Dec. 31, 2022	Jul. 29, 2023
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized share-based compensation		$ 231.5
Weighted-average period for recognition of share-based compensation (in years)		1 year 5 months 12 days
Service period	10 years
Age reached	60 years
Retirement notice period	12 months

SEGMENTS AND ENTITY-WIDE DISC_3

SEGMENTS AND ENTITY-WIDE DISCLOSURES - Narrative (Details) $ in Thousands	9 Months Ended
	Jul. 29, 2023 USD ($) segment	Oct. 29, 2022 USD ($)
Segment Reporting [Abstract]
Equipment, building, furniture and fixtures, net	$ 287,455	$ 267,779
Operating right-of-use assets	$ 40,482	$ 45,108
Number of operating segments \| segment	4

SEGMENTS AND ENTITY-WIDE DISC_4

SEGMENTS AND ENTITY-WIDE DISCLOSURES - Other Intangibles Assets, Goodwill and Maintenance Spares (Details) - USD ($) $ in Thousands	Jul. 29, 2023	Oct. 29, 2022
Segment Reporting Information [Line Items]
Other intangible assets, net	$ 219,085	$ 69,517
Goodwill	446,596	328,322
Maintenance spares, net	48,165
Networking Platforms
Segment Reporting Information [Line Items]
Other intangible assets, net	198,937
Goodwill	201,356	$ 83,082
Maintenance spares, net	0
Platform Software and Services
Segment Reporting Information [Line Items]
Other intangible assets, net	0
Goodwill	156,191
Maintenance spares, net	0
Blue Planet Automation Software and Services
Segment Reporting Information [Line Items]
Other intangible assets, net	20,148
Goodwill	89,049
Maintenance spares, net	0
Global Services
Segment Reporting Information [Line Items]
Other intangible assets, net	0
Goodwill	0
Maintenance spares, net	$ 48,165

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		9 Months Ended
	Jul. 29, 2023	Jul. 30, 2022	Jul. 29, 2023	Jul. 30, 2022
Less: Non-performance operating expenses
Selling and marketing	$ 118,266	$ 105,880	$ 367,156	$ 344,700
General and administrative	49,349	41,121	151,184	131,191
Significant asset impairments and restructuring costs	4,174	7,692	16,625	20,203
Amortization of intangible assets	9,487	8,919	26,773	26,757
Acquisition and integration costs	59	35	3,474	598
Add: Other non-performance financial items
Interest and other income, net	10,187	366	50,711	4,860
Interest expense	(24,060)	(12,642)	(63,819)	(33,275)
Less: Provision for income taxes	34,608	4,319	89,507	21,868
Net income	29,733	10,512	163,628	95,257
Operating Segments
Add: Other non-performance financial items
Net income	259,549	190,754	831,455	668,989
Operating Segments \| Networking Platforms
Add: Other non-performance financial items
Net income	171,380	108,282	588,281	395,176
Operating Segments \| Platform Software and Services
Add: Other non-performance financial items
Net income	49,691	39,646	136,028	132,698
Operating Segments \| Blue Planet Automation Software and Services
Add: Other non-performance financial items
Net income	(12,072)	(10,139)	(30,044)	(17,693)
Operating Segments \| Global Services
Add: Other non-performance financial items
Net income	$ 50,550	$ 52,965	$ 137,190	$ 158,808

SEGMENTS AND ENTITY-WIDE DISC_6

SEGMENTS AND ENTITY-WIDE DISCLOSURES - Geographic Distribution of Equipment, Building, Furniture and Fixtures (Details) - USD ($) $ in Thousands	Jul. 29, 2023	Oct. 29, 2022
Revenues from External Customers and Long-Lived Assets [Line Items]
Equipment, building, furniture and fixtures, net	$ 327,937	$ 312,887
Canada
Revenues from External Customers and Long-Lived Assets [Line Items]
Equipment, building, furniture and fixtures, net	241,416	226,451
United States
Revenues from External Customers and Long-Lived Assets [Line Items]
Equipment, building, furniture and fixtures, net	46,936	47,515
Other International
Revenues from External Customers and Long-Lived Assets [Line Items]
Equipment, building, furniture and fixtures, net	$ 39,585	$ 38,921

SUBSEQUENT EVENTS (Details)

SUBSEQUENT EVENTS (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	1 Months Ended	3 Months Ended
	Sep. 01, 2023	Jul. 29, 2023
Subsequent Event [Line Items]
Repurchase of common stock under the stock repurchase program (in shares)		1.4
Repurchase of common stock under the stock repurchase program (in shares)		$ 61.2
Repurchase of common stock under the stock repurchase program (in dollars per share)		$ 42.48
Aggregate shares repurchased (in shares)		9.9
Authorized funds remaining under stock repurchase program		$ 438.8
Subsequent event
Subsequent Event [Line Items]
Repurchase of common stock under the stock repurchase program (in shares)	0.9
Repurchase of common stock under the stock repurchase program (in shares)	$ 38.8
Repurchase of common stock under the stock repurchase program (in dollars per share)	$ 41.67
Aggregate shares repurchased (in shares)	10.8
Authorized funds remaining under stock repurchase program	$ 400