Stock-Based Compensation - Stock Compensation Expense (Detail) - USD ($) $ / shares in Units, $ in Thousands		3 Months Ended		9 Months Ended
		Jul. 31, 2022	Jul. 31, 2021	Jul. 31, 2022	Jul. 31, 2021
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock-based compensation expense before taxes	[1]	$ 127,605	$ 85,162	$ 333,437	$ 248,530
Income tax benefit		(20,940)	(13,277)	(54,717)	(38,746)
Stock-based compensation expense after taxes		$ 106,665	71,885	$ 278,720	209,784
Restricted Stock Units (RSUs), Market-based
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Grant date fair value (in USD per share)				$ 280.82
Expected volatility				33.01%
Risk-free interest rate				1.33%
Expected term				1 year 8 months 8 days
Restricted Stock Units (RSUs), Market-based | Maximum
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Target number of initial award earned, percentage		187.50%		187.50%
Cost of products
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock-based compensation expense before taxes		$ 15,318	9,582	$ 39,603	28,238
Cost of maintenance and service
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock-based compensation expense before taxes		6,859	3,446	17,335	10,192
Research and development expense
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock-based compensation expense before taxes		68,243	42,430	175,892	124,231
Sales and marketing expense
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock-based compensation expense before taxes		22,998	15,330	60,090	45,040
General and administrative expense
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock-based compensation expense before taxes		$ 14,187	$ 14,374	$ 40,517	$ 40,829

[1] During the three and nine months ended July 31, 2022, we recognized stock-based compensation expense relating to restricted stock units (RSUs), granted to senior executives in February 2022 with certain market, performance and service conditions (market-based RSUs). Under the award agreements, the vesting of the market-based RSUs is contingent on achieving total stockholder return (TSR) relative to a peer index as well as revenue growth metrics. The performance period during which the achievement goals will be measured is fiscal 2022 and fiscal 2023. The maximum potential awards that may be earned are 187.5% of the target number of the initial awards. The awards will vest in equal increments in December 2023 and December 2024 if the TSR target, revenue growth metrics, and service conditions are achieved. The grant date fair value for the market-based RSUs of $280.82 was determined using a Monte Carlo simulation model with the following assumptions: expected volatility of 33.01%, risk-free interest rate of 1.33% and an expected term of 1.69 years.