Financial Assets and Liabilities - Unaudited Condensed Consolidated Statement of Operations Location and Amount of Gains and Losses on Derivative Instrument Fair Values for Designated Hedge Instruments, Net of Tax (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jul. 31, 2018	Jul. 31, 2017	Jul. 31, 2018	Jul. 31, 2017
Financial Assets and Liabilities [Line Items]
Amount of gain (loss) recognized in OCI on derivatives (effective portion)	$ (12,371)	$ 8,571	$ (7,891)	$ 19,181
Amount of gain (loss) reclassified from OCI (effective portion)	1,662	(22)	12,510	(5,615)
Foreign Exchange Contracts | Revenues
Financial Assets and Liabilities [Line Items]
Amount of gain (loss) recognized in OCI on derivatives (effective portion)	1,422	(176)	(542)	6,824
Amount of gain (loss) reclassified from OCI (effective portion)	(308)	(198)	1,190	(2,379)
Foreign Exchange Contracts | Operating expenses
Financial Assets and Liabilities [Line Items]
Amount of gain (loss) recognized in OCI on derivatives (effective portion)	(13,793)	8,747	(7,349)	12,357
Amount of gain (loss) reclassified from OCI (effective portion)	$ 1,970	$ 176	$ 11,320	$ (3,236)