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Income Taxes (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Nov. 30, 2023 | Nov. 30, 2022 | Nov. 30, 2023 | Nov. 30, 2022 | May 31, 2023
Income Tax Disclosure [Abstract] |  |  |  |  |
Unrecognized tax benefits | $ 31.3 |  | $ 31.3 |  | $ 29.3
Effective tax rate | 20.90% | 22.10% | 20.10% | 18.40% |

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