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Prepaid Expenses and Other (Details) - USD ($) $ in Thousands	3 Months Ended
	Jan. 31, 2020	Jan. 31, 2019	Oct. 31, 2019
Capitalized Contract Cost [Line Items]
Prepaid VAT and other taxes	$ 87,706		$ 84,706
Prepaid expenses	65,806		48,680
Product demonstration equipment, net	37,866		38,900
Other non-trade receivables	36,236		28,136
Deferred deployment expense	318		125
Derivative assets	273		1,570
Restricted cash	0		74
Prepaid expenses and other	321,313		297,914
Depreciation of product demonstration equipment	2,200	$ 2,200
Contract assets for unbilled accounts receivable
Capitalized Contract Cost [Line Items]
Contract assets	83,717		84,046
Capitalized contract acquisition costs
Capitalized Contract Cost [Line Items]
Contract assets	$ 9,391		$ 11,677

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