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Stock-Based Compensation - Stock Compensation Expense (Detail) - USD ($) $ in Thousands | 3 Months Ended
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Jan. 31, 2021 | Jan. 31, 2020
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] |  |
Stock-based compensation expense before taxes | $ 83,782 | $ 51,883
Income tax benefit | (13,279) | (8,924)
Stock-based compensation expense after taxes | 70,503 | 42,959
Cost of products |  |
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] |  |
Stock-based compensation expense before taxes | 9,352 | 5,580
Cost of maintenance and service |  |
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] |  |
Stock-based compensation expense before taxes | 3,335 | 2,032
Research and development expense |  |
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] |  |
Stock-based compensation expense before taxes | 41,294 | 26,209
Sales and marketing expense |  |
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] |  |
Stock-based compensation expense before taxes | 15,159 | 8,894
General and administrative expense |  |
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] |  |
Stock-based compensation expense before taxes | $ 14,642 | $ 9,168

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