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Employee Benefit Plans (Details) - Schedule Of Amounts Recognized In Balance Sheet - USD ($) $ in Millions | May 31, 2021 | May 31, 2020
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U.K. | Pension Plans |  |
Defined Benefit Plan, Amounts for Asset (Liability) Recognized in Statement of Financial Position [Abstract] |  |
Current liabilities | $ 0.0 | $ 0.0
Non-current liabilities | (6.2) | (5.1)
Net funded balance | (6.2) | (5.1)
U.S. | Other Postretirement Benefits |  |
Defined Benefit Plan, Amounts for Asset (Liability) Recognized in Statement of Financial Position [Abstract] |  |
Current liabilities | (1.3) | (1.5)
Non-current liabilities | (10.8) | (19.3)
Net funded balance | $ (12.1) | $ (20.8)

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