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Related Party Disclosures (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Millions |  | 12 Months Ended | 50 Months Ended
--- | --- | --- | ---
Jan. 19, 2022 | May 31, 2022 | May 31, 2021 | May 31, 2020 | May 31, 2022
Related Party Transactions [Abstract] |  |  |  |  |
Amount of stock repurchased in period |  | $ 33.4 | $ 0.0 | $ 35.5 | $ 66.1
Related Party Transaction [Line Items] |  |  |  |  |
Amount of stock repurchased in period |  | $ 33.4 | $ 0.0 | $ 35.5 | $ 66.1
Repurchase of Common Stock | Former Chief Executive Officer, Estate |  |  |  |  |
Related Party Transactions [Abstract] |  |  |  |  |
Shares of stock repurchased (in shares) | 300 |  |  |  |
Treasury Stock Acquired, Cost Per Share | $ 40.65 |  |  |  |
Amount of stock repurchased in period | $ 12.2 |  |  |  |
Treasury Stock, Discount, Percent | 4.20% |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |
Shares of stock repurchased (in shares) | 300 |  |  |  |
Treasury Stock Acquired, Cost Per Share | $ 40.65 |  |  |  |
Amount of stock repurchased in period | $ 12.2 |  |  |  |
Treasury Stock, Discount, Percent | 4.20% |  |  |  |
Average cost of stock repurchased (in Dollars per share) | $ 42.43 |  |  |  |

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