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Income Taxes - Reconciliation of Effective Income Tax Rate (Details) | 12 Months Ended
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Oct. 31, 2019 | Oct. 31, 2018 | Oct. 31, 2017
Income Tax Disclosure [Abstract] |  |  |
Federal statutory rate | 21.00% | 23.33% | 35.00%
Impact of foreign tax rate differential | 0.10% | (0.57%) | (9.86%)
State and local taxes, net of federal tax benefit | 1.99% | 2.38% | 1.35%
Net impact of changes in valuation allowances | 2.41% | 5.65% | 20.74%
Non-deductible write-off and impairment of goodwill and other intangible assets | 0.29% | 0.06% | (0.02%)
Unrecognized tax benefits | (0.76%) | 3.41% | (2.00%)
Permanent book-tax differences | (0.87%) | (4.03%) | (15.71%)
Withholding taxes | 2.43% | 1.84% | 1.88%
Tax Reform Act | (0.19%) | (7.31%) | 0.00%
Other items, net | 0.58% | (0.33%) | 2.20%
Effective income tax rate | 26.98% | 24.43% | 33.58%

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