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Treasury Stock (Details) - Schedule of repurchase of common stock - USD ($) shares in Millions, $ in Millions | 12 Months Ended | 38 Months Ended |  |
--- | --- | --- | --- | ---
May 31, 2021 | May 31, 2020 | May 31, 2019 | May 31, 2021 | Mar. 18, 2020 | Mar. 21, 2018
Equity, Class of Treasury Stock [Line Items] |  |  |  |  |  |
Amount of stock repurchased in period |  | $ 35.5 | $ 8.5 |  |  |
Board Authorized 2018 Share Repurchase Program |  |  |  |  |  |
Equity, Class of Treasury Stock [Line Items] |  |  |  |  |  |
Stock Repurchase Program, Increase in Authorized Amount | $ 100.0 |  |  | $ 100.0 | $ 50.0 | $ 50.0
Amount of stock repurchased in period |  |  |  | 32.7 |  |
Remaining authorized repurchase amount | $ 67.3 |  |  | $ 67.3 |  |
Shares of stock repurchased (in shares) | 0.0 |  |  |  |  |

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