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SEGMENTS AND ENTITY-WIDE DISCLOSURES
 9 Months Ended
Aug. 02, 2025
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.

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; interest and other income, net; interest expense; loss on extinguishment and modification of debt; and provision for income taxes.
The table below sets forth Ciena’s segment profit (loss) and the reconciliation to net income for the periods presented (in thousands):
Quarter EndedNine Months Ended
 August 2,July 27,August 2,July 27,
 2025202420252024
Segment profit (loss):
Networking Platforms$181,993 $106,870 $482,784 $387,211 
Platform Software and Services54,529 53,131 168,077 165,171 
Blue Planet Automation Software and Services4,192 4,705 13,059 (10,127)
Global Services50,467 50,351 144,389 145,776 
Total segment profit291,181 215,057 808,309 688,031 
Less: Non-performance operating expenses 
  Selling and marketing148,724 121,520 424,911 373,749 
  General and administrative60,596 58,248 171,450 162,504 
  Significant asset impairments and restructuring costs1,770 1,361 5,262 21,987 
  Amortization of intangible assets6,556 7,185 19,646 22,384 
Add: Other non-performance financial items
Interest and other income, net15,090 14,013 34,539 36,460 
Interest expense(22,806)(24,401)(67,421)(72,038)
Loss on extinguishment and modification of debt— — (729)— 
Less: Provision for income taxes15,511 2,125 49,580 24,901 
Net income$50,308 $14,230 $103,849 $46,928 

Entity-Wide Reporting
Ciena's long-lived assets, including equipment, building, furniture and fixtures, operating ROU assets, finite-lived intangible assets, and maintenance spares, are not reviewed by Ciena's chief operating decision maker for purposes of evaluating performance and allocating resources. As of August 2, 2025, equipment, building, furniture and fixtures, net, totaled $368.3 million, and operating ROU assets totaled $40.3 million both of which support asset groups within Ciena’s four operating segments and unallocated selling and general and administrative activities. As of August 2, 2025, finite-lived intangible assets, goodwill, and maintenance spares are assigned to asset groups within the following segments (in thousands):
August 2, 2025
Networking PlatformsPlatform Software and ServicesBlue Planet Automation Software and ServicesGlobal ServicesTotal
Other intangible assets, net$137,558 — 1,115 — $138,673 
Goodwill$199,588 156,191 89,049 — $444,828 
Maintenance spares, net$— — — 86,431 $86,431 
The following table represents Ciena’s geographic distribution of equipment, building, furniture and fixtures, net and operating ROU assets, specifically identifying any country that accounts for at least 10% of the total of these assets. Assets attributable to geographic regions not identified 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):
August 2,
2025		November 2,
2024
Canada$311,313 $283,760 
United States44,432 49,195 
Other International52,950 32,184 
Total$408,695 $365,139