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SEGMENTS AND ENTITY-WIDE DISCLOSURES
 6 Months Ended
May 02, 2026
Segment Reporting [Abstract]  
SEGMENTS AND ENTITY-WIDE DISCLOSURES SEGMENTS AND ENTITY-WIDE DISCLOSURES
Operating segments are defined as components of an enterprise that engage in business activities that earn revenue and incur expense for which discrete financial information is available, and for which such information is evaluated regularly by the chief operating decision maker (“CODM”) for purposes of allocating resources and assessing performance. Ciena has the following operating segments for reporting purposes: (i) Networking Platforms; (ii) Platform Software and Services; (iii) Blue Planet Automation Software and Services; and (iv) Global Services. Ciena’s CODM is its Chief Executive Officer, Gary Smith, who evaluates Ciena’s performance and allocates resources based on segment profit (loss) as compared to annual targets for these four operating segments.

Segment Profit (Loss)
The table below sets forth Ciena’s segment profit (loss) and the reconciliations to consolidated net income for the respective periods indicated (in thousands). The CODM excludes the following items in his assessment of performance of the operating segments: selling and marketing costs; general and administrative costs, significant asset impairments and restructuring costs; share-based compensation expense, amortization of intangible assets; acquisition and integration costs; interest and other income, net; interest expense; loss on extinguishment and modification of debt; and provision for income taxes.
Quarter EndedSix Months Ended
 May 2,May 3,May 2,May 3,
 2026202520262025
Revenue:
Networking Platforms$1,274,078 $866,315 $2,423,246 $1,687,458 
Platform Software and Services93,878 85,441 187,262 180,508 
Blue Planet Automation Software and Services23,361 27,951 43,781 53,982 
Global Services179,422 146,171 343,492 276,190 
Total revenue$1,570,739 $1,125,878 $2,997,781 $2,198,138 
Segment gross profit:
Networking Platforms$551,054 $321,098 $1,042,735 $656,081 
Platform Software and Services80,875 71,196 161,854 152,951 
Blue Planet Automation Software and Services7,386 15,393 12,962 30,182 
Global Services65,540 53,396 125,456 101,078 
Total segment gross profit$704,855 $461,083 $1,343,007 $940,292 
Research and development expense:
Networking Platforms$189,503 $169,676 $364,553 $322,497 
Platform Software and Services18,431 18,201 37,692 34,531 
Blue Planet Automation Software and Services10,228 8,916 19,619 17,206 
Global Services1,157 1,054 2,319 2,039 
Total segment research and development expense$219,319 $197,847 $424,183 $376,273 
Segment profit (loss):
Networking Platforms$361,551 $151,422 $678,182 $333,584 
Platform Software and Services62,444 52,995 124,162 118,420 
Blue Planet Automation Software and Services(2,842)6,477 (6,657)12,976 
Global Services64,383 52,342 123,137 99,039 
Total segment profit$485,536 $263,236 $918,824 $564,019 
Less: Unallocated cost of goods sold$13,301 $8,245 $25,933 $15,633 
Less: Unallocated operating and non-operating expenses254,015 246,022 524,388 494,845 
Consolidated net income$218,220 $8,969 $368,503 $53,541 

Entity-Wide Reporting
Ciena's long-lived assets, including equipment, building, furniture and fixtures, operating right-of-use (“ROU”) assets, finite-lived intangible assets, goodwill, and maintenance spares, are not reviewed by Ciena's CODM for purposes of evaluating performance and allocating resources. As of May 2, 2026, equipment, building, furniture and fixtures, net, totaled $445.1 million, and operating ROU assets totaled $38.5 million, both of which support asset groups within Ciena’s four operating segments and unallocated selling and general and administrative activities.
The following table shows Ciena’s finite-lived intangible assets, goodwill, and maintenance spares allocated by segment and reconciled to total assets (in thousands):
May 2, 2026
Networking PlatformsPlatform Software and ServicesBlue Planet Automation Software and ServicesGlobal ServicesTotal
Other intangible assets, net$202,190 — — — $202,190 
Goodwill$275,161 156,191 89,049 — $520,401 
Maintenance spares, net$— — — 98,690 $98,690 
Total assets assigned to segments$821,281 
Other unallocated assets5,218,168 
Total assets$6,039,449 
November 1, 2025
Networking PlatformsPlatform Software and ServicesBlue Planet Automation Software and ServicesGlobal ServicesTotal
Other intangible assets, net$224,210 — — — $224,210 
Goodwill$275,964 156,191 89,049 — $521,204 
Maintenance spares, net$— — — 92,392 $92,392 
Total assets assigned to segments$837,806 
Other unallocated assets5,026,861 
Total assets$5,864,667 
The following table shows Ciena’s geographic distribution of equipment, building, furniture and fixtures, net and operating ROU assets (in thousands):
May 2,
2026		November 1,
2025
Canada $384,995 $325,584 
United States42,832 44,634 
Other International (1)
55,714 55,174 
Total$483,541 $425,392 
(1) Any other country representing less than 10% of total is reflected in aggregate as “Other International.”