Employee Benefit Plans - Stock Option Plans and Stock Purchase Rights Granted Under ESPP (Detail) - $ / shares	12 Months Ended
	Oct. 31, 2017	Oct. 31, 2016	Oct. 31, 2015
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 3 months 18 days
Risk-free interest rate, minimum	1.73%	1.06%	1.24%
Risk-free interest rate, maximum	2.06%	1.63%	1.58%
Volatility, minimum	18.51%	19.21%	16.92%
Volatility, maximum	19.67%	21.62%	21.76%
Weighted average estimated fair value (in USD per share)	$ 13.56	$ 8.97	$ 8.77
Employee Stock Purchase Plan
Schedule of Weighted Average Assumptions for Fair Values of Stock Options[Line Items]
Risk-free interest rate, minimum	0.82%	0.53%	0.12%
Risk-free interest rate, maximum	1.37%	0.86%	0.75%
Volatility, minimum	17.20%	17.03%	18.01%
Volatility, maximum	19.99%	25.46%	21.60%
Weighted average estimated fair value (in USD per share)	$ 18.77	$ 12.75	$ 11.11
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