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		6 Months Ended
	Apr. 30, 2022	Apr. 30, 2021	Apr. 30, 2022	Apr. 30, 2021
Financial Assets and Liabilities [Line Items]
Total revenue	$ 1,279,229	$ 1,024,323	$ 2,549,484	$ 1,994,644
Operating Expenses	662,717	616,106	1,328,952	1,230,080
Net income	294,781	195,078	608,468	357,423
Foreign Exchange Contracts | Amount of gains (losses) recognized in OCI on derivatives (effective portion)
Financial Assets and Liabilities [Line Items]
Total revenue	(7,008)	1,804	(7,825)	1,641
Operating Expenses	(14,124)	(590)	(14,892)	3,666
Net income	(21,132)	1,214	(22,717)	5,307
Foreign Exchange Contracts | Amount of gains (losses) reclassified from OCI (effective portion)
Financial Assets and Liabilities [Line Items]
Total revenue	229	921	(342)	1,034
Operating Expenses	(891)	3,702	(1,165)	6,316
Net income	$ (662)	$ 4,623	$ (1,507)	$ 7,350