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Employee Benefit Plans - Summary of Impact of Deferred Plan (Detail) - USD ($) $ in Thousands | 12 Months Ended
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Oct. 31, 2020 | Oct. 31, 2019 | Oct. 31, 2018
Share-based Payment Arrangement [Abstract] |  |  |
Increase (reduction) to cost of revenue and operating expense | $ 21,469 | $ 27,759 | $ 4,636
Other income (expense), net | 21,469 | 27,759 | 4,636
Net increase (decrease) to net income | $ 0 | $ 0 | $ 0

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