Employee Benefit Plans (Restricted Stock Units) - Additional Information (Detail) $ / shares in Units, $ in Millions	12 Months Ended
	Oct. 31, 2021 USD ($) $ / shares
Schedule Of Restricted Stock [Line Items]
Closing stock price (in USD per share) | $ / shares	$ 333.18
Unamortized share-based compensation expense	$ 680.8
Weighted-average period of total compensation costs to be recognized over a period in years	2 years 2 months 12 days
Employee Stock Purchase Plan
Schedule Of Restricted Stock [Line Items]
Unamortized share-based compensation expense	$ 49.3
Weighted-average period of total compensation costs to be recognized over a period in years	2 years