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Taxes - Schedule of earnings from continuing operations before income taxes (Details) - USD ($) $ in Millions | 12 Months Ended
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May 31, 2024 | May 31, 2023 | May 31, 2022
Taxes (Details) - Schedule of earnings from continuing operations before income taxes [Line Items] |  |  |
Earnings (loss) from continuing operations before income taxes | $ 16.2 | $ 112.4 | $ 89.7
United States |  |  |
Taxes (Details) - Schedule of earnings from continuing operations before income taxes [Line Items] |  |  |
Earnings (loss) from continuing operations before income taxes | 17.3 | 106.3 | 76.9
Non-United States |  |  |
Taxes (Details) - Schedule of earnings from continuing operations before income taxes [Line Items] |  |  |
Earnings (loss) from continuing operations before income taxes | $ (1.1) | $ 6.1 | $ 12.8

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