REVENUE - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended
	Jan. 27, 2024	Jan. 28, 2023
Disaggregation of Revenue [Line Items]
Total revenue	$ 1,037,709	$ 1,056,521
Products and services at a point in time
Disaggregation of Revenue [Line Items]
Total revenue	845,637	887,240
Services transferred over time
Disaggregation of Revenue [Line Items]
Total revenue	192,072	169,281
Networking Platforms
Disaggregation of Revenue [Line Items]
Total revenue	807,236	855,139
Networking Platforms | Products and services at a point in time
Disaggregation of Revenue [Line Items]
Total revenue	807,236	855,139
Networking Platforms | Services transferred over time
Disaggregation of Revenue [Line Items]
Total revenue	0	0
Platform Software and Services
Disaggregation of Revenue [Line Items]
Total revenue	89,745	73,445
Platform Software and Services | Products and services at a point in time
Disaggregation of Revenue [Line Items]
Total revenue	27,694	18,864
Platform Software and Services | Services transferred over time
Disaggregation of Revenue [Line Items]
Total revenue	62,051	54,581
Blue Planet Automation Software and Services
Disaggregation of Revenue [Line Items]
Total revenue	13,942	15,405
Blue Planet Automation Software and Services | Products and services at a point in time
Disaggregation of Revenue [Line Items]
Total revenue	1,069	3,982
Blue Planet Automation Software and Services | Services transferred over time
Disaggregation of Revenue [Line Items]
Total revenue	12,873	11,423
Global Services
Disaggregation of Revenue [Line Items]
Total revenue	126,786	112,532
Global Services | Products and services at a point in time
Disaggregation of Revenue [Line Items]
Total revenue	9,638	9,255
Global Services | Services transferred over time
Disaggregation of Revenue [Line Items]
Total revenue	117,148	103,277
Optical Networking
Disaggregation of Revenue [Line Items]
Total revenue	695,849	735,634
Optical Networking | Networking Platforms
Disaggregation of Revenue [Line Items]
Total revenue	695,849	735,634
Optical Networking | Platform Software and Services
Disaggregation of Revenue [Line Items]
Total revenue	0	0
Optical Networking | Blue Planet Automation Software and Services
Disaggregation of Revenue [Line Items]
Total revenue	0	0
Optical Networking | Global Services
Disaggregation of Revenue [Line Items]
Total revenue	0	0
Routing and Switching
Disaggregation of Revenue [Line Items]
Total revenue	111,387	119,505
Routing and Switching | Networking Platforms
Disaggregation of Revenue [Line Items]
Total revenue	111,387	119,505
Routing and Switching | Platform Software and Services
Disaggregation of Revenue [Line Items]
Total revenue	0	0
Routing and Switching | Blue Planet Automation Software and Services
Disaggregation of Revenue [Line Items]
Total revenue	0	0
Routing and Switching | Global Services
Disaggregation of Revenue [Line Items]
Total revenue	0	0
Platform Software and Services
Disaggregation of Revenue [Line Items]
Total revenue	89,745	73,445
Platform Software and Services | Networking Platforms
Disaggregation of Revenue [Line Items]
Total revenue	0	0
Platform Software and Services | Platform Software and Services
Disaggregation of Revenue [Line Items]
Total revenue	89,745	73,445
Platform Software and Services | Blue Planet Automation Software and Services
Disaggregation of Revenue [Line Items]
Total revenue	0	0
Platform Software and Services | Global Services
Disaggregation of Revenue [Line Items]
Total revenue	0	0
Blue Planet Automation Software and Services
Disaggregation of Revenue [Line Items]
Total revenue	13,942	15,405
Blue Planet Automation Software and Services | Networking Platforms
Disaggregation of Revenue [Line Items]
Total revenue	0	0
Blue Planet Automation Software and Services | Platform Software and Services
Disaggregation of Revenue [Line Items]
Total revenue	0	0
Blue Planet Automation Software and Services | Blue Planet Automation Software and Services
Disaggregation of Revenue [Line Items]
Total revenue	13,942	15,405
Blue Planet Automation Software and Services | Global Services
Disaggregation of Revenue [Line Items]
Total revenue	0	0
Maintenance Support and Training
Disaggregation of Revenue [Line Items]
Total revenue	74,115	67,891
Maintenance Support and Training | Networking Platforms
Disaggregation of Revenue [Line Items]
Total revenue	0	0
Maintenance Support and Training | Platform Software and Services
Disaggregation of Revenue [Line Items]
Total revenue	0	0
Maintenance Support and Training | Blue Planet Automation Software and Services
Disaggregation of Revenue [Line Items]
Total revenue	0	0
Maintenance Support and Training | Global Services
Disaggregation of Revenue [Line Items]
Total revenue	74,115	67,891
Installation and Deployment
Disaggregation of Revenue [Line Items]
Total revenue	42,723	34,575
Installation and Deployment | Networking Platforms
Disaggregation of Revenue [Line Items]
Total revenue	0	0
Installation and Deployment | Platform Software and Services
Disaggregation of Revenue [Line Items]
Total revenue	0	0
Installation and Deployment | Blue Planet Automation Software and Services
Disaggregation of Revenue [Line Items]
Total revenue	0	0
Installation and Deployment | Global Services
Disaggregation of Revenue [Line Items]
Total revenue	42,723	34,575
Consulting and Network Design
Disaggregation of Revenue [Line Items]
Total revenue	9,948	10,066
Consulting and Network Design | Networking Platforms
Disaggregation of Revenue [Line Items]
Total revenue	0	0
Consulting and Network Design | Platform Software and Services
Disaggregation of Revenue [Line Items]
Total revenue	0	0
Consulting and Network Design | Blue Planet Automation Software and Services
Disaggregation of Revenue [Line Items]
Total revenue	0	0
Consulting and Network Design | Global Services
Disaggregation of Revenue [Line Items]
Total revenue	$ 9,948	$ 10,066