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Stock-Based Compensation - Stock Compensation Expense (Detail) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
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Jul. 31, 2021 | Jul. 31, 2020 | Jul. 31, 2021 | Jul. 31, 2020
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] |  |  |  |
Stock-based compensation expense before taxes | $ 85,162 | $ 61,837 | $ 248,530 | $ 170,155
Income tax benefit | (13,277) | (10,562) | (38,746) | (29,062)
Stock-based compensation expense after taxes | 71,885 | 51,275 | 209,784 | 141,093
Cost of products |  |  |  |
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] |  |  |  |
Stock-based compensation expense before taxes | 9,582 | 6,478 | 28,238 | 18,174
Cost of maintenance and service |  |  |  |
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] |  |  |  |
Stock-based compensation expense before taxes | 3,446 | 1,959 | 10,192 | 6,109
Research and development expense |  |  |  |
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] |  |  |  |
Stock-based compensation expense before taxes | 42,430 | 31,367 | 124,231 | 86,469
Sales and marketing expense |  |  |  |
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] |  |  |  |
Stock-based compensation expense before taxes | 15,330 | 10,863 | 45,040 | 29,483
General and administrative expense |  |  |  |
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] |  |  |  |
Stock-based compensation expense before taxes | $ 14,374 | $ 11,170 | $ 40,829 | $ 29,920

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