Employee Benefit Plans (Employee Stock Purchase Plan) - Additional Information (Detail) - $ / shares shares in Millions	12 Months Ended
	Oct. 31, 2021	Oct. 31, 2020	Oct. 31, 2019	Apr. 09, 2020
Share-based Payment Arrangement [Abstract]
Threshold for employee stock purchases under ESPP, maximum value	85.00%
ESPP offering period (in years)	2 years
Increase in number of shares authorized for issuance under plan (in shares)				5.0
Shares issued (in shares)	1.0	1.0	1.2
Weighted average purchase price of stock purchased (in USD per share)	$ 134.26	$ 103.41	$ 73.18
Shares reserved for future issuance under the ESPP (in shares)	12.8