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Income Taxes - Provision for Income Taxes and Effective Tax Rates (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
Income Tax Disclosure [Abstract] |  |  |  |
Income before income taxes | $ 213,337 | $ 236,854 | $ 606,436 | $ 446,593
Provision (benefit) for income taxes | $ 14,945 | $ (16,057) | $ 51,214 | $ (20,299)
Effective tax rate | 7.00% | (6.80%) | 8.40% | (4.50%)

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