Taxes - Schedule of earnings from continuing operations before income taxes (Details) - USD ($) $ in Millions	12 Months Ended
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

Amount of income (loss) from continuing operations, including income (loss) from equity method investments, before deduction of income tax expense (benefit), and income (loss) attributable to noncontrolling interest.

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+ Details