Prepaid Expenses and Other (Details) - USD ($) $ in Thousands	9 Months Ended
	Jul. 31, 2019	Jul. 31, 2018	Nov. 01, 2018	Oct. 31, 2018
Capitalized Contract Cost [Line Items]
Prepaid VAT and other taxes	$ 84,359			$ 82,518
Product demonstration equipment, net	39,977			37,623
Prepaid expenses	46,666			32,987
Other non-trade receivables	36,798			25,716
Financing receivable	0			626
Deferred deployment expense	0			19,342
Derivative assets	882			133
Prepaid expenses and other	292,631		$ 220,415	198,945
Depreciation of product demonstration equipment	6,500	$ 6,800
Contract assets for unbilled accounts receivable
Capitalized Contract Cost [Line Items]
Contract assets	74,348			0
Capitalized commissions - short term
Capitalized Contract Cost [Line Items]
Contract assets	$ 9,601			$ 0