Prepaid Expenses and Other (Details) - USD ($) $ in Thousands	3 Months Ended
	Jan. 31, 2019	Jan. 31, 2018	Nov. 01, 2018	Oct. 31, 2018
Prepaid expenses and other
Prepaid VAT and other taxes	$ 71,941			$ 82,518
Product demonstration equipment, net	39,875			37,623
Prepaid expenses	29,146			32,987
Other non-trade receivables	19,866			25,716
Financing receivable	289			626
Deferred deployment expense	62			19,342
Derivative assets	52			133
Prepaid expenses and other	217,422		$ 220,415	198,945
Depreciation of product demonstration equipment	2,200	$ 2,400
Contract assets for unbilled accounts receivable
Prepaid expenses and other
Contract assets	47,541			0
Capitalized commissions - short term
Prepaid expenses and other
Contract assets	$ 8,650			$ 0