Revenue - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Aug. 01, 2020	Aug. 03, 2019	Aug. 01, 2020	Aug. 03, 2019
Disaggregation of Revenue [Line Items]
Total revenue	$ 976,712	$ 960,606	$ 2,703,677	$ 2,604,144
Products and services at a point in time
Disaggregation of Revenue [Line Items]
Total revenue	821,816	815,470	2,246,782	2,178,571
Services transferred over time
Disaggregation of Revenue [Line Items]
Total revenue	154,896	145,136	456,895	425,573
Converged Packet Optical
Disaggregation of Revenue [Line Items]
Total revenue	722,512	724,245	1,968,355	1,897,080
Packet Networking
Disaggregation of Revenue [Line Items]
Total revenue	79,756	71,823	211,432	216,529
Platform Software and Services
Disaggregation of Revenue [Line Items]
Total revenue	46,422	37,312	143,295	114,139
Blue Planet Automation Software and Services
Disaggregation of Revenue [Line Items]
Total revenue	11,297	10,530	41,779	37,977
Maintenance Support and Training
Disaggregation of Revenue [Line Items]
Total revenue	69,099	65,936	202,370	196,002
Installation and Deployment
Disaggregation of Revenue [Line Items]
Total revenue	39,798	39,802	108,994	111,746
Consulting and Network Design
Disaggregation of Revenue [Line Items]
Total revenue	7,828	10,958	27,452	30,671
Operating Segments
Disaggregation of Revenue [Line Items]
Total revenue	976,712	960,606	2,703,677	2,604,144
Networking Platforms
Disaggregation of Revenue [Line Items]
Total revenue	802,268	796,068	2,179,787	2,113,609
Networking Platforms | Products and services at a point in time
Disaggregation of Revenue [Line Items]
Total revenue	802,268	796,068	2,179,787	2,113,609
Networking Platforms | Services transferred over time
Disaggregation of Revenue [Line Items]
Total revenue	0	0	0	0
Networking Platforms | Operating Segments
Disaggregation of Revenue [Line Items]
Total revenue	802,268	796,068	2,179,787	2,113,609
Networking Platforms | Operating Segments | Converged Packet Optical
Disaggregation of Revenue [Line Items]
Total revenue	722,512	724,245	1,968,355	1,897,080
Networking Platforms | Operating Segments | Packet Networking
Disaggregation of Revenue [Line Items]
Total revenue	79,756	71,823	211,432	216,529
Networking Platforms | Operating Segments | Platform Software and Services
Disaggregation of Revenue [Line Items]
Total revenue	0	0	0	0
Networking Platforms | Operating Segments | Blue Planet Automation Software and Services
Disaggregation of Revenue [Line Items]
Total revenue	0	0	0	0
Networking Platforms | Operating Segments | Maintenance Support and Training
Disaggregation of Revenue [Line Items]
Total revenue	0	0	0	0
Networking Platforms | Operating Segments | Installation and Deployment
Disaggregation of Revenue [Line Items]
Total revenue	0	0	0	0
Networking Platforms | Operating Segments | Consulting and Network Design
Disaggregation of Revenue [Line Items]
Total revenue	0	0	0	0
Platform Software and Services
Disaggregation of Revenue [Line Items]
Total revenue	46,422	37,312	143,295	114,139
Platform Software and Services | Products and services at a point in time
Disaggregation of Revenue [Line Items]
Total revenue	15,838	12,657	45,930	39,801
Platform Software and Services | Services transferred over time
Disaggregation of Revenue [Line Items]
Total revenue	30,584	24,655	97,365	74,338
Platform Software and Services | Operating Segments
Disaggregation of Revenue [Line Items]
Total revenue	46,422	37,312	143,295	114,139
Platform Software and Services | Operating Segments | Converged Packet Optical
Disaggregation of Revenue [Line Items]
Total revenue	0	0	0	0
Platform Software and Services | Operating Segments | Packet Networking
Disaggregation of Revenue [Line Items]
Total revenue	0	0	0	0
Platform Software and Services | Operating Segments | Platform Software and Services
Disaggregation of Revenue [Line Items]
Total revenue	46,422	37,312	143,295	114,139
Platform Software and Services | Operating Segments | Blue Planet Automation Software and Services
Disaggregation of Revenue [Line Items]
Total revenue	0	0	0	0
Platform Software and Services | Operating Segments | Maintenance Support and Training
Disaggregation of Revenue [Line Items]
Total revenue	0	0	0	0
Platform Software and Services | Operating Segments | Installation and Deployment
Disaggregation of Revenue [Line Items]
Total revenue	0	0	0	0
Platform Software and Services | Operating Segments | Consulting and Network Design
Disaggregation of Revenue [Line Items]
Total revenue	0	0	0	0
Blue Planet Automation Software and Services
Disaggregation of Revenue [Line Items]
Total revenue	11,297	10,530	41,779	37,977
Blue Planet Automation Software and Services | Products and services at a point in time
Disaggregation of Revenue [Line Items]
Total revenue	410	1,941	8,891	11,216
Blue Planet Automation Software and Services | Services transferred over time
Disaggregation of Revenue [Line Items]
Total revenue	10,887	8,589	32,888	26,761
Blue Planet Automation Software and Services | Operating Segments
Disaggregation of Revenue [Line Items]
Total revenue	11,297	10,530	41,779	37,977
Blue Planet Automation Software and Services | Operating Segments | Converged Packet Optical
Disaggregation of Revenue [Line Items]
Total revenue	0	0	0	0
Blue Planet Automation Software and Services | Operating Segments | Packet Networking
Disaggregation of Revenue [Line Items]
Total revenue	0	0	0	0
Blue Planet Automation Software and Services | Operating Segments | Platform Software and Services
Disaggregation of Revenue [Line Items]
Total revenue	0	0	0	0
Blue Planet Automation Software and Services | Operating Segments | Blue Planet Automation Software and Services
Disaggregation of Revenue [Line Items]
Total revenue	11,297	10,530	41,779	37,977
Blue Planet Automation Software and Services | Operating Segments | Maintenance Support and Training
Disaggregation of Revenue [Line Items]
Total revenue	0	0	0	0
Blue Planet Automation Software and Services | Operating Segments | Installation and Deployment
Disaggregation of Revenue [Line Items]
Total revenue	0	0	0	0
Blue Planet Automation Software and Services | Operating Segments | Consulting and Network Design
Disaggregation of Revenue [Line Items]
Total revenue	0	0	0	0
Global Services
Disaggregation of Revenue [Line Items]
Total revenue	116,725	116,696	338,816	338,419
Global Services | Products and services at a point in time
Disaggregation of Revenue [Line Items]
Total revenue	3,300	4,804	12,174	13,945
Global Services | Services transferred over time
Disaggregation of Revenue [Line Items]
Total revenue	113,425	111,892	326,642	324,474
Global Services | Operating Segments
Disaggregation of Revenue [Line Items]
Total revenue	116,725	116,696	338,816	338,419
Global Services | Operating Segments | Converged Packet Optical
Disaggregation of Revenue [Line Items]
Total revenue	0	0	0	0
Global Services | Operating Segments | Packet Networking
Disaggregation of Revenue [Line Items]
Total revenue	0	0	0	0
Global Services | Operating Segments | Platform Software and Services
Disaggregation of Revenue [Line Items]
Total revenue	0	0	0	0
Global Services | Operating Segments | Blue Planet Automation Software and Services
Disaggregation of Revenue [Line Items]
Total revenue	0	0	0	0
Global Services | Operating Segments | Maintenance Support and Training
Disaggregation of Revenue [Line Items]
Total revenue	69,099	65,936	202,370	196,002
Global Services | Operating Segments | Installation and Deployment
Disaggregation of Revenue [Line Items]
Total revenue	39,798	39,802	108,994	111,746
Global Services | Operating Segments | Consulting and Network Design
Disaggregation of Revenue [Line Items]
Total revenue	$ 7,828	$ 10,958	$ 27,452	$ 30,671