Prepaid Expenses and Other (Details) - USD ($) $ in Thousands	6 Months Ended
	May 01, 2021	May 02, 2020	Oct. 31, 2020
Capitalized Contract Cost [Line Items]
Prepaid expenses	$ 77,389		$ 70,647
Prepaid VAT and other taxes	72,325		72,838
Product demonstration equipment, net	45,151		44,793
Other non-trade receivables	14,193		21,981
Derivative assets	13,785		82
Deferred deployment expense	421		604
Prepaid expenses and other	321,651		308,084
Depreciation of product demonstration equipment	5,100	$ 4,200
CEWS receivable
Capitalized Contract Cost [Line Items]
CEWS receivable	3,942		0
Contract assets for unbilled accounts receivable, net
Capitalized Contract Cost [Line Items]
Contract assets	81,437		85,843
Capitalized contract acquisition costs
Capitalized Contract Cost [Line Items]
Contract assets	$ 13,008		$ 11,296