Stock Repurchase Program - Stock Repurchase Activities (Detail) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Jan. 31, 2021	[1]	Jan. 31, 2020
Stock Repurchase Program [Abstract]
Purchases of treasury stock (in shares)	837		579
Aggregate purchased shares	$ 202,871		$ 80,000
Reissuance of treasury stock	583		450

[1] Does not include the $50.0 million equity forward contract, from the December 2020 ASR.