Stock Repurchase Program - Stock Repurchase Activities (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Oct. 31, 2020	Oct. 31, 2019	Oct. 31, 2018
Stock Repurchase Program
Purchases of treasury stock (in shares)	1,585	2,732	4,688	[1]
Average purchase price (in USD per share)	$ 152.76	$ 120.49	$ 89.59	[1]
Aggregate purchase price	$ 242,078	$ 329,185	$ 420,000	[1]
Reissuance of treasury stock	3,872	3,798	3,508

[1] The first quarter of fiscal 2018 includes the settlement of the $20.0 million equity forward contract related to the September 2017 ASR.