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Revenue - Disaggregation of Revenue (Details) - USD ($)
$ in Thousands
 12 Months Ended
Oct. 31, 2020
Nov. 02, 2019
Nov. 03, 2018
Disaggregation of Revenue [Line Items]      
Total revenue $ 3,532,157 $ 3,572,131 $ 3,094,286
Products and services at a point in time      
Disaggregation of Revenue [Line Items]      
Total revenue 2,918,108 3,003,347  
Products and services transferred over time      
Disaggregation of Revenue [Line Items]      
Total revenue 614,049 568,784  
Converged Packet Optical      
Disaggregation of Revenue [Line Items]      
Total revenue 2,547,647 2,562,841  
Packet Networking      
Disaggregation of Revenue [Line Items]      
Total revenue 267,416 348,477  
Platform Software and Services      
Disaggregation of Revenue [Line Items]      
Total revenue 197,809 155,376  
Blue Planet Automation Software and Services      
Disaggregation of Revenue [Line Items]      
Total revenue 62,632 54,555  
Maintenance Support and Training      
Disaggregation of Revenue [Line Items]      
Total revenue 269,354 261,337  
Installation and Deployment      
Disaggregation of Revenue [Line Items]      
Total revenue 152,003 148,233  
Consulting and Network Design      
Disaggregation of Revenue [Line Items]      
Total revenue 35,296 41,312  
Operating Segments      
Disaggregation of Revenue [Line Items]      
Total revenue 3,532,157 3,572,131 3,094,286
Networking Platforms | Operating Segments      
Disaggregation of Revenue [Line Items]      
Total revenue 2,815,063 2,911,318 2,478,018
Networking Platforms | Operating Segments | Products and services at a point in time      
Disaggregation of Revenue [Line Items]      
Total revenue 2,815,063 2,911,318  
Networking Platforms | Operating Segments | Products and services transferred over time      
Disaggregation of Revenue [Line Items]      
Total revenue 0 0  
Networking Platforms | Operating Segments | Converged Packet Optical      
Disaggregation of Revenue [Line Items]      
Total revenue 2,547,647 2,562,841 2,194,519
Networking Platforms | Operating Segments | Packet Networking      
Disaggregation of Revenue [Line Items]      
Total revenue 267,416 348,477 283,499
Networking Platforms | Operating Segments | Platform Software and Services      
Disaggregation of Revenue [Line Items]      
Total revenue 0 0  
Networking Platforms | Operating Segments | Blue Planet Automation Software and Services      
Disaggregation of Revenue [Line Items]      
Total revenue 0 0  
Networking Platforms | Operating Segments | Maintenance Support and Training      
Disaggregation of Revenue [Line Items]      
Total revenue 0 0  
Networking Platforms | Operating Segments | Installation and Deployment      
Disaggregation of Revenue [Line Items]      
Total revenue 0 0  
Networking Platforms | Operating Segments | Consulting and Network Design      
Disaggregation of Revenue [Line Items]      
Total revenue 0 0  
Platform Software and Services | Operating Segments      
Disaggregation of Revenue [Line Items]      
Total revenue 197,809 155,376  
Platform Software and Services | Operating Segments | Products and services at a point in time      
Disaggregation of Revenue [Line Items]      
Total revenue 69,099 55,530  
Platform Software and Services | Operating Segments | Products and services transferred over time      
Disaggregation of Revenue [Line Items]      
Total revenue 128,710 99,846  
Platform Software and Services | Operating Segments | Converged Packet Optical      
Disaggregation of Revenue [Line Items]      
Total revenue 0 0  
Platform Software and Services | Operating Segments | Packet Networking      
Disaggregation of Revenue [Line Items]      
Total revenue 0 0  
Platform Software and Services | Operating Segments | Platform Software and Services      
Disaggregation of Revenue [Line Items]      
Total revenue 197,809 155,376 173,949
Platform Software and Services | Operating Segments | Blue Planet Automation Software and Services      
Disaggregation of Revenue [Line Items]      
Total revenue 0 0  
Platform Software and Services | Operating Segments | Maintenance Support and Training      
Disaggregation of Revenue [Line Items]      
Total revenue 0 0  
Platform Software and Services | Operating Segments | Installation and Deployment      
Disaggregation of Revenue [Line Items]      
Total revenue 0 0  
Platform Software and Services | Operating Segments | Consulting and Network Design      
Disaggregation of Revenue [Line Items]      
Total revenue 0 0  
Blue Planet Automation Software and Services | Operating Segments      
Disaggregation of Revenue [Line Items]      
Total revenue 62,632 54,555  
Blue Planet Automation Software and Services | Operating Segments | Products and services at a point in time      
Disaggregation of Revenue [Line Items]      
Total revenue 19,583 17,697  
Blue Planet Automation Software and Services | Operating Segments | Products and services transferred over time      
Disaggregation of Revenue [Line Items]      
Total revenue 43,049 36,858  
Blue Planet Automation Software and Services | Operating Segments | Converged Packet Optical      
Disaggregation of Revenue [Line Items]      
Total revenue 0 0  
Blue Planet Automation Software and Services | Operating Segments | Packet Networking      
Disaggregation of Revenue [Line Items]      
Total revenue 0 0  
Blue Planet Automation Software and Services | Operating Segments | Platform Software and Services      
Disaggregation of Revenue [Line Items]      
Total revenue 0 0  
Blue Planet Automation Software and Services | Operating Segments | Blue Planet Automation Software and Services      
Disaggregation of Revenue [Line Items]      
Total revenue 62,632 54,555 26,764
Blue Planet Automation Software and Services | Operating Segments | Maintenance Support and Training      
Disaggregation of Revenue [Line Items]      
Total revenue 0 0  
Blue Planet Automation Software and Services | Operating Segments | Installation and Deployment      
Disaggregation of Revenue [Line Items]      
Total revenue 0 0  
Blue Planet Automation Software and Services | Operating Segments | Consulting and Network Design      
Disaggregation of Revenue [Line Items]      
Total revenue 0 0  
Global Services | Operating Segments      
Disaggregation of Revenue [Line Items]      
Total revenue 456,653 450,882 415,555
Global Services | Operating Segments | Products and services at a point in time      
Disaggregation of Revenue [Line Items]      
Total revenue 14,363 18,802  
Global Services | Operating Segments | Products and services transferred over time      
Disaggregation of Revenue [Line Items]      
Total revenue 442,290 432,080  
Global Services | Operating Segments | Converged Packet Optical      
Disaggregation of Revenue [Line Items]      
Total revenue 0 0  
Global Services | Operating Segments | Packet Networking      
Disaggregation of Revenue [Line Items]      
Total revenue 0 0  
Global Services | Operating Segments | Platform Software and Services      
Disaggregation of Revenue [Line Items]      
Total revenue 0 0  
Global Services | Operating Segments | Blue Planet Automation Software and Services      
Disaggregation of Revenue [Line Items]      
Total revenue 0 0  
Global Services | Operating Segments | Maintenance Support and Training      
Disaggregation of Revenue [Line Items]      
Total revenue 269,354 261,337 245,161
Global Services | Operating Segments | Installation and Deployment      
Disaggregation of Revenue [Line Items]      
Total revenue 152,003 148,233 128,829
Global Services | Operating Segments | Consulting and Network Design      
Disaggregation of Revenue [Line Items]      
Total revenue $ 35,296 $ 41,312 $ 41,565