Employee Benefit Plans - Restricted Stock Units (Detail) - Restricted Stock Units (RSUs) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands		12 Months Ended
		Oct. 31, 2021	Oct. 31, 2020	Oct. 31, 2019	Oct. 31, 2018
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Beginning balance (in shares)	[1]	4,130	3,857	3,769
Granted (in shares)	[1],[2]	1,901	2,041	1,844
Vested (in shares)	[1],[3]	(1,565)	(1,480)	(1,508)
Forfeited (in shares)	[1]	(279)	(288)	(248)
Ending balance (in shares)	[1]	4,187	4,130	3,857	3,769
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]
Weighted Average Grant Date Fair Value, Beginning balance (in USD per share)		$ 134.80	$ 97.21	$ 72.75
Granted (in USD per share)		258.58	168.15	119.27
Vested (in USD per share)		122.01	88.70	65.97
Forfeited (in USD per share)		167.76	104.67	79.49
Weighted Average Grant Date Fair Value, Ending balance (in USD per share)		$ 193.58	$ 134.80	$ 97.21	$ 72.75
Weighted Average Remaining Contractual Life (In Years)		1 year 4 months 20 days	1 year 5 months 19 days	1 year 6 months 21 days	1 year 5 months 15 days
Aggregate Fair Value		$ 421,034	$ 261,563	$ 176,659

[1] No restricted stock units were assumed in connection with acquisitions in the last three fiscal years, but the balance at fiscal year-end includes certain restricted stock units that were previously assumed in connection with acquisitions.

[2] Includes restricted stock units granted to senior management with performance-based vesting criteria (in addition to service-based vesting criteria) (performance-based RSUs) reported at the maximum possible number of shares that may ultimately be issuable if all applicable performance-based criteria are achieved at their maximum levels and all applicable service-based criteria are fully satisfied.

[3] The number of vested restricted stock units includes shares that were withheld on behalf of employees to satisfy the minimum statutory tax withholding requirements.