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Revenue - Disaggregation of Revenue (Details) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Jan. 31, 2020 | Jan. 31, 2019
Disaggregation of Revenue [Line Items] |  |
Total revenue | $ 832,912 | $ 778,527
Products and services at a point in time |  |
Disaggregation of Revenue [Line Items] |  |
Total revenue | 680,104 | 646,404
Services transferred over time |  |
Disaggregation of Revenue [Line Items] |  |
Total revenue | 152,808 | 132,123
Converged Packet Optical |  |
Disaggregation of Revenue [Line Items] |  |
Total revenue | 591,549 | 548,997
Packet Networking |  |
Disaggregation of Revenue [Line Items] |  |
Total revenue | 67,508 | 71,569
Platform Software and Services |  |
Disaggregation of Revenue [Line Items] |  |
Total revenue | 51,888 | 41,598
Blue Planet Automation Software and Services |  |
Disaggregation of Revenue [Line Items] |  |
Total revenue | 15,466 | 14,974
Maintenance Support and Training |  |
Disaggregation of Revenue [Line Items] |  |
Total revenue | 61,793 | 61,277
Installation and Deployment |  |
Disaggregation of Revenue [Line Items] |  |
Total revenue | 34,954 | 30,622
Consulting and Network Design |  |
Disaggregation of Revenue [Line Items] |  |
Total revenue | 9,754 | 9,490
Operating Segments |  |
Disaggregation of Revenue [Line Items] |  |
Total revenue | 832,912 | 778,527
Networking Platforms |  |
Disaggregation of Revenue [Line Items] |  |
Total revenue | 659,057 | 620,566
Networking Platforms | Products and services at a point in time |  |
Disaggregation of Revenue [Line Items] |  |
Total revenue | 659,057 | 620,566
Networking Platforms | Services transferred over time |  |
Disaggregation of Revenue [Line Items] |  |
Total revenue | 0 | 0
Networking Platforms | Operating Segments |  |
Disaggregation of Revenue [Line Items] |  |
Total revenue | 659,057 | 620,566
Networking Platforms | Operating Segments | Converged Packet Optical |  |
Disaggregation of Revenue [Line Items] |  |
Total revenue | 591,549 | 548,997
Networking Platforms | Operating Segments | Packet Networking |  |
Disaggregation of Revenue [Line Items] |  |
Total revenue | 67,508 | 71,569
Networking Platforms | Operating Segments | Platform Software and Services |  |
Disaggregation of Revenue [Line Items] |  |
Total revenue | 0 | 0
Networking Platforms | Operating Segments | Blue Planet Automation Software and Services |  |
Disaggregation of Revenue [Line Items] |  |
Total revenue | 0 | 0
Networking Platforms | Operating Segments | Maintenance Support and Training |  |
Disaggregation of Revenue [Line Items] |  |
Total revenue | 0 | 0
Networking Platforms | Operating Segments | Installation and Deployment |  |
Disaggregation of Revenue [Line Items] |  |
Total revenue | 0 | 0
Networking Platforms | Operating Segments | Consulting and Network Design |  |
Disaggregation of Revenue [Line Items] |  |
Total revenue | 0 | 0
Platform Software and Services |  |
Disaggregation of Revenue [Line Items] |  |
Total revenue | 51,888 | 41,598
Platform Software and Services | Products and services at a point in time |  |
Disaggregation of Revenue [Line Items] |  |
Total revenue | 13,114 | 16,044
Platform Software and Services | Services transferred over time |  |
Disaggregation of Revenue [Line Items] |  |
Total revenue | 38,774 | 25,554
Platform Software and Services | Operating Segments |  |
Disaggregation of Revenue [Line Items] |  |
Total revenue | 51,888 | 41,598
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 | 51,888 | 41,598
Platform Software and Services | Operating Segments | Blue Planet Automation Software and Services |  |
Disaggregation of Revenue [Line Items] |  |
Total revenue | 0 | 0
Platform Software and Services | Operating Segments | Maintenance Support and Training |  |
Disaggregation of Revenue [Line Items] |  |
Total revenue | 0 | 0
Platform Software and Services | Operating Segments | Installation and Deployment |  |
Disaggregation of Revenue [Line Items] |  |
Total revenue | 0 | 0
Platform Software and Services | Operating Segments | Consulting and Network Design |  |
Disaggregation of Revenue [Line Items] |  |
Total revenue | 0 | 0
Blue Planet Automation Software and Services |  |
Disaggregation of Revenue [Line Items] |  |
Total revenue | 15,466 | 14,974
Blue Planet Automation Software and Services | Products and services at a point in time |  |
Disaggregation of Revenue [Line Items] |  |
Total revenue | 3,736 | 6,228
Blue Planet Automation Software and Services | Services transferred over time |  |
Disaggregation of Revenue [Line Items] |  |
Total revenue | 11,730 | 8,746
Blue Planet Automation Software and Services | Operating Segments |  |
Disaggregation of Revenue [Line Items] |  |
Total revenue | 15,466 | 14,974
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 | 15,466 | 14,974
Blue Planet Automation Software and Services | Operating Segments | Maintenance Support and Training |  |
Disaggregation of Revenue [Line Items] |  |
Total revenue | 0 | 0
Blue Planet Automation Software and Services | Operating Segments | Installation and Deployment |  |
Disaggregation of Revenue [Line Items] |  |
Total revenue | 0 | 0
Blue Planet Automation Software and Services | Operating Segments | Consulting and Network Design |  |
Disaggregation of Revenue [Line Items] |  |
Total revenue | 0 | 0
Global Services |  |
Disaggregation of Revenue [Line Items] |  |
Total revenue | 106,501 | 101,389
Global Services | Products and services at a point in time |  |
Disaggregation of Revenue [Line Items] |  |
Total revenue | 4,197 | 3,566
Global Services | Services transferred over time |  |
Disaggregation of Revenue [Line Items] |  |
Total revenue | 102,304 | 97,823
Global Services | Operating Segments |  |
Disaggregation of Revenue [Line Items] |  |
Total revenue | 106,501 | 101,389
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 | 61,793 | 61,277
Global Services | Operating Segments | Installation and Deployment |  |
Disaggregation of Revenue [Line Items] |  |
Total revenue | 34,954 | 30,622
Global Services | Operating Segments | Consulting and Network Design |  |
Disaggregation of Revenue [Line Items] |  |
Total revenue | $ 9,754 | $ 9,490

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