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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, 2022 | May 31, 2021 | May 31, 2020
Taxes (Details) - Schedule of earnings from continuing operations before income taxes [Line Items] |  |  |
Earnings (loss) from continuing operations before income taxes | $ 89.7 | $ (18.2) | $ (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 | 76.9 | (45.8) | (92.5)
Non-United States |  |  |
Taxes (Details) - Schedule of earnings from continuing operations before income taxes [Line Items] |  |  |
Earnings (loss) from continuing operations before income taxes | $ 12.8 | $ 27.6 | $ 2.8

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