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Segments and Entity-Wide Disclosures (Details) $ in Thousands	3 Months Ended		12 Months Ended
	Jan. 31, 2020 USD ($) region	Jan. 31, 2019 USD ($)	Oct. 31, 2019 USD ($) segment	Nov. 01, 2019 USD ($)
Segment Reporting Information [Line Items]
Equipment, building, furniture and fixtures, net	$ 277,739
Operating right-of-use assets	50,148			$ 53,334
Goodwill	$ 310,913		$ 297,937
Number of geographic regions | region	3
Net revenue	$ 832,912	$ 778,527
United States
Segment Reporting Information [Line Items]
Equipment, building, furniture and fixtures, net	51,819
Net revenue	524,300	464,100
Software and Software-Related Services
Segment Reporting Information [Line Items]
Number of operating segments | segment			2
Networking Platforms
Segment Reporting Information [Line Items]
Net revenue	659,057	620,566
Platform Software and Services
Segment Reporting Information [Line Items]
Net revenue	51,888	41,598
Blue Planet Automation Software and Services
Segment Reporting Information [Line Items]
Net revenue	15,466	14,974
Global Services
Segment Reporting Information [Line Items]
Net revenue	106,501	101,389
Operating Segments
Segment Reporting Information [Line Items]
Net revenue	832,912	778,527
Operating Segments | Networking Platforms
Segment Reporting Information [Line Items]
Intangible assets, net	17,900
Goodwill	65,700
Net revenue	659,057	620,566
Operating Segments | Platform Software and Services
Segment Reporting Information [Line Items]
Goodwill	156,200
Net revenue	51,888	41,598
Operating Segments | Blue Planet Automation Software and Services
Segment Reporting Information [Line Items]
Intangible assets, net	107,700
Goodwill	89,000
Net revenue	15,466	14,974
Operating Segments | Global Services
Segment Reporting Information [Line Items]
Maintenance spares, net	54,900
Net revenue	$ 106,501	$ 101,389

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