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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, 2019	Jul. 31, 2018	Jul. 31, 2019	Jul. 31, 2018
Financial Assets and Liabilities [Line Items]
Amount of gain (loss) recognized in OCI on derivatives (effective portion)	$ (1,070)	$ (12,371)	$ 4,844	$ (7,891)
Amount of gain (loss) reclassified from OCI (effective portion)	(3,260)	1,662	(11,747)	12,510
Foreign Exchange Contracts | Revenues
Financial Assets and Liabilities [Line Items]
Amount of gain (loss) recognized in OCI on derivatives (effective portion)	(994)	1,422	(253)	(542)
Amount of gain (loss) reclassified from OCI (effective portion)	685	(308)	1,048	1,190
Foreign Exchange Contracts | Operating expenses
Financial Assets and Liabilities [Line Items]
Amount of gain (loss) recognized in OCI on derivatives (effective portion)	(76)	(13,793)	5,097	(7,349)
Amount of gain (loss) reclassified from OCI (effective portion)	$ (3,945)	$ 1,970	$ (12,795)	$ 11,320

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Financial Assets and Liabilities [Line Items]

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The effective portion of net gain (loss) reclassified from accumulated other comprehensive income into income on derivative instruments designated and qualifying as hedging instruments.

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-Publisher FASB
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-Topic 815
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Amount before tax of increase (decrease) in accumulated gain (loss) from derivative instruments designated and qualifying as the effective portion of cash flow hedges and an entity's share of an equity investee's increase (decrease) in deferred hedging gain (loss).

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