Taxes (Details) - Schedule of earnings from continuing operations before income taxes - USD ($) $ in Millions	12 Months Ended
May 31, 2018	May 31, 2017	May 31, 2016
Taxes (Details) - Schedule of earnings from continuing operations before income taxes [Line Items]
Earnings (loss) from continuing operations before income taxes	$ (1.5)	$ 87.9	$ 68.7
United States [Member]
Taxes (Details) - Schedule of earnings from continuing operations before income taxes [Line Items]
Earnings (loss) from continuing operations before income taxes	(18.4)	78.7	62.1
Non-United States [Member]
Taxes (Details) - Schedule of earnings from continuing operations before income taxes [Line Items]
Earnings (loss) from continuing operations before income taxes	$ 16.9	$ 9.2	$ 6.6

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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