Financial Assets and Liabilities - Income Statement Location and Amount of Gains and Losses on Derivative Instrument Fair Values for Designated Hedge Instruments, Net of Tax (Detail) - USD ($) $ in Thousands	12 Months Ended
	Oct. 31, 2021	Oct. 31, 2020	Oct. 31, 2019
Financial Assets And Liabilities [Line Items]
Revenues	$ 4,204,193	$ 3,685,281	$ 3,360,694
Operating expenses	2,607,626	2,270,450	2,087,517
Net income	757,516	664,347	532,367
Foreign Exchange Contracts
Financial Assets And Liabilities [Line Items]
Revenues	1,148	3,034	278
Operating expenses	8,712	4,800	4,455
Net income	9,860	7,834	4,733
Foreign Exchange Contracts | Amount of gain (loss) reclassified  from OCI (effective  portion)
Financial Assets And Liabilities [Line Items]
Revenues	4,181	530	1,436
Operating expenses	10,378	(603)	(16,073)
Net income	$ 14,559	$ (73)	$ (14,637)