REVENUE - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jul. 30, 2022	Jul. 31, 2021	Jul. 30, 2022	Jul. 31, 2021
Disaggregation of Revenue [Line Items]
Total revenue	$ 867,981	$ 988,141	$ 2,661,651	$ 2,579,198
Products and services at a point in time
Disaggregation of Revenue [Line Items]
Total revenue	693,848	811,598	2,141,169	2,081,549
Services transferred over time
Disaggregation of Revenue [Line Items]
Total revenue	174,133	176,543	520,482	497,649
Converged Packet Optical
Disaggregation of Revenue [Line Items]
Total revenue	563,837	712,906	1,730,066	1,798,888
Routing and Switching
Disaggregation of Revenue [Line Items]
Total revenue	100,741	69,698	295,638	197,632
Platform Software and Services
Disaggregation of Revenue [Line Items]
Total revenue	63,483	56,945	205,557	163,472
Blue Planet Automation Software and Services
Disaggregation of Revenue [Line Items]
Total revenue	17,342	16,607	55,334	57,499
Maintenance Support and Training
Disaggregation of Revenue [Line Items]
Total revenue	72,760	74,006	219,270	212,054
Installation and Deployment
Disaggregation of Revenue [Line Items]
Total revenue	38,704	46,653	120,504	124,263
Consulting and Network Design
Disaggregation of Revenue [Line Items]
Total revenue	11,114	11,326	35,282	25,390
Networking Platforms
Disaggregation of Revenue [Line Items]
Total revenue	664,578	782,604	2,025,704	1,996,520
Networking Platforms | Products and services at a point in time
Disaggregation of Revenue [Line Items]
Total revenue	664,578	782,604	2,025,704	1,996,520
Networking Platforms | Services transferred over time
Disaggregation of Revenue [Line Items]
Total revenue	0	0	0	0
Networking Platforms | Converged Packet Optical
Disaggregation of Revenue [Line Items]
Total revenue	563,837	712,906	1,730,066	1,798,888
Networking Platforms | Routing and Switching
Disaggregation of Revenue [Line Items]
Total revenue	100,741	69,698	295,638	197,632
Networking Platforms | Platform Software and Services
Disaggregation of Revenue [Line Items]
Total revenue	0	0	0	0
Networking Platforms | Blue Planet Automation Software and Services
Disaggregation of Revenue [Line Items]
Total revenue	0	0	0	0
Networking Platforms | Maintenance Support and Training
Disaggregation of Revenue [Line Items]
Total revenue	0	0	0	0
Networking Platforms | Installation and Deployment
Disaggregation of Revenue [Line Items]
Total revenue	0	0	0	0
Networking Platforms | 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	63,483	56,945	205,557	163,472
Platform Software and Services | Products and services at a point in time
Disaggregation of Revenue [Line Items]
Total revenue	15,230	17,928	66,655	54,756
Platform Software and Services | Services transferred over time
Disaggregation of Revenue [Line Items]
Total revenue	48,253	39,017	138,902	108,716
Platform Software and Services | Converged Packet Optical
Disaggregation of Revenue [Line Items]
Total revenue	0	0	0	0
Platform Software and Services | Routing and Switching
Disaggregation of Revenue [Line Items]
Total revenue	0	0	0	0
Platform Software and Services | Platform Software and Services
Disaggregation of Revenue [Line Items]
Total revenue	63,483	56,945	205,557	163,472
Platform Software and Services | Blue Planet Automation Software and Services
Disaggregation of Revenue [Line Items]
Total revenue	0	0	0	0
Platform Software and Services | Maintenance Support and Training
Disaggregation of Revenue [Line Items]
Total revenue	0	0	0	0
Platform Software and Services | Installation and Deployment
Disaggregation of Revenue [Line Items]
Total revenue	0	0	0	0
Platform Software and Services | 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	17,342	16,607	55,334	57,499
Blue Planet Automation Software and Services | Products and services at a point in time
Disaggregation of Revenue [Line Items]
Total revenue	4,632	4,558	17,442	20,497
Blue Planet Automation Software and Services | Services transferred over time
Disaggregation of Revenue [Line Items]
Total revenue	12,710	12,049	37,892	37,002
Blue Planet Automation Software and Services | Converged Packet Optical
Disaggregation of Revenue [Line Items]
Total revenue	0	0	0	0
Blue Planet Automation Software and Services | Routing and Switching
Disaggregation of Revenue [Line Items]
Total revenue	0	0	0	0
Blue Planet Automation Software and Services | Platform Software and Services
Disaggregation of Revenue [Line Items]
Total revenue	0	0	0	0
Blue Planet Automation Software and Services | Blue Planet Automation Software and Services
Disaggregation of Revenue [Line Items]
Total revenue	17,342	16,607	55,334	57,499
Blue Planet Automation Software and Services | Maintenance Support and Training
Disaggregation of Revenue [Line Items]
Total revenue	0	0	0	0
Blue Planet Automation Software and Services | Installation and Deployment
Disaggregation of Revenue [Line Items]
Total revenue	0	0	0	0
Blue Planet Automation Software and Services | Consulting and Network Design
Disaggregation of Revenue [Line Items]
Total revenue	0	0	0	0
Global Services
Disaggregation of Revenue [Line Items]
Total revenue	122,578	131,985	375,056	361,707
Global Services | Products and services at a point in time
Disaggregation of Revenue [Line Items]
Total revenue	9,408	6,508	31,368	9,776
Global Services | Services transferred over time
Disaggregation of Revenue [Line Items]
Total revenue	113,170	125,477	343,688	351,931
Global Services | Converged Packet Optical
Disaggregation of Revenue [Line Items]
Total revenue	0	0	0	0
Global Services | Routing and Switching
Disaggregation of Revenue [Line Items]
Total revenue	0	0	0	0
Global Services | Platform Software and Services
Disaggregation of Revenue [Line Items]
Total revenue	0	0	0	0
Global Services | Blue Planet Automation Software and Services
Disaggregation of Revenue [Line Items]
Total revenue	0	0	0	0
Global Services | Maintenance Support and Training
Disaggregation of Revenue [Line Items]
Total revenue	72,760	74,006	219,270	212,054
Global Services | Installation and Deployment
Disaggregation of Revenue [Line Items]
Total revenue	38,704	46,653	120,504	124,263
Global Services | Consulting and Network Design
Disaggregation of Revenue [Line Items]
Total revenue	$ 11,114	$ 11,326	$ 35,282	$ 25,390