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Income Taxes - Income Taxes Computed at the U.S. Statutory Rate and Income Tax (Detail) | 2 Months Ended | 10 Months Ended | 12 Months Ended
--- | --- | --- | ---
Dec. 31, 2017 | Oct. 31, 2018 | Oct. 31, 2019 | Oct. 31, 2018 | Oct. 31, 2017
Income Tax Disclosure [Abstract] |  |  |  |  |
Statutory federal income tax rate | 35.00% | 21.00% | 21.00% | 23.34% | 35.00%
Transition tax |  |  | 1.46% | 6.16% |
Tax rate change deferred tax remeasurement |  |  |  | (10.94%) |
Share-based and other compensation |  |  | (0.55%) | (1.45%) |
Domestic production deduction |  |  |  | (0.82%) | (1.48%)
Foreign tax rate variances, net of foreign tax credits |  |  | 1.16% | (0.46%) | (4.69%)
State and local taxes, net of federal income tax benefit |  |  | 0.74% | 0.45% | 0.76%
Amounts related to prior years |  |  | (0.55%) | (0.21%) | 0.03%
Foreign-Derived Intangible Income Deduction |  |  | (1.51%) |  |
Global Intangible Low-Taxed Income net of foreign tax credits |  |  | 0.85% |  |
Other – net |  |  | (0.79%) | (0.21%) |
Effective tax rate |  |  | 21.81% | 15.86% | 29.62%

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