Employee Benefit Plans - Pretax Intrinsic Value of Options Exercised and Their Average Exercise Prices (Detail) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
Oct. 31, 2020	Oct. 31, 2019	Oct. 31, 2018
Share-based Payment Arrangement [Abstract]
Intrinsic value	$ 218,640	$ 110,815	$ 71,840
Average exercise price per share (in USD per share)	$ 51.76	$ 44.29	$ 38.18

Amount of accumulated difference between fair value of underlying shares on dates of exercise and exercise price on options exercised (or share units converted) into shares.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (d)(2)
-URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration