Employee Benefit Plans - Stock Option Plans and Stock Purchase Rights Granted Under ESPP (Detail) - $ / shares	12 Months Ended
	Oct. 31, 2020	Oct. 31, 2019	Oct. 31, 2018
Stock Option
Schedule of Weighted Average Assumptions for Fair Values of Stock Options[Line Items]
Expected life (in years)	4 years 1 month 6 days	4 years 1 month 6 days	4 years 1 month 6 days
Risk-free interest rate, minimum	0.26%	1.28%	2.10%
Risk-free interest rate, maximum	1.71%	2.73%	2.95%
Volatility, minimum	23.05%	23.16%	20.22%
Volatility, maximum	32.80%	24.76%	21.04%
Weighted average estimated fair value (in USD per share)	$ 33.02	$ 22.86	$ 23.55
Employee Stock Purchase Plan
Schedule of Weighted Average Assumptions for Fair Values of Stock Options[Line Items]
Risk-free interest rate, minimum	0.09%	1.54%	1.80%
Risk-free interest rate, maximum	1.24%	2.60%	2.73%
Volatility, minimum	25.59%	23.73%	19.99%
Volatility, maximum	43.06%	27.86%	21.54%
Weighted average estimated fair value (in USD per share)	$ 47.69	$ 35.18	$ 23.34
Employee Stock Purchase Plan | Minimum
Schedule of Weighted Average Assumptions for Fair Values of Stock Options[Line Items]
Expected life (in years)	6 months	6 months	6 months
Employee Stock Purchase Plan | Maximum
Schedule of Weighted Average Assumptions for Fair Values of Stock Options[Line Items]
Expected life (in years)	2 years	2 years	2 years