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Income Taxes (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jan. 31, 2021 | Jan. 31, 2020 | Jan. 31, 2021 | Jan. 31, 2020
Tax benefits recognized provided percentage of likelihood of realization is more than |  |  | 50.00% |
Share-based Payment Arrangement, Expense, Tax Benefit | $ 2.2 | $ 14.8 | $ 13.9 | $ 77.2
Effective Income Tax Rate Reconciliation, Percent | 23.40% | 17.70% | 21.10% | 5.00%

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