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Employee Benefit Plans - Stock Compensation Expense (Detail) - USD ($) $ in Thousands | 12 Months Ended
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Oct. 31, 2020 | Oct. 31, 2019 | Oct. 31, 2018
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] |  |  |
Stock compensation expense before taxes | $ 248,584 | $ 155,001 | $ 140,032
Income tax benefit | (39,077) | (26,226) | (26,578)
Stock compensation expense after taxes | 209,507 | 128,775 | 113,454
Cost of products |  |  |
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] |  |  |
Stock compensation expense before taxes | 27,193 | 17,193 | 14,648
Cost of maintenance and service |  |  |
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] |  |  |
Stock compensation expense before taxes | 9,327 | 6,385 | 5,467
Research and development expense |  |  |
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] |  |  |
Stock compensation expense before taxes | 125,814 | 75,853 | 67,355
Sales and marketing expense |  |  |
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] |  |  |
Stock compensation expense before taxes | 43,205 | 28,834 | 28,069
General and administrative expense |  |  |
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] |  |  |
Stock compensation expense before taxes | $ 43,045 | $ 26,736 | $ 24,493

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