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Employee Benefit Plans - Schedule Of Amounts Recognized In Balance Sheet (Details) - USD ($) $ in Millions | May 31, 2022 | May 31, 2021
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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 | (1.5) | (6.2)
Net funded balance | (1.5) | (6.2)
U.S. | Other Postretirement Benefits |  |
Defined Benefit Plan, Amounts for Asset (Liability) Recognized in Statement of Financial Position [Abstract] |  |
Current liabilities | (1.1) | (1.3)
Non-current liabilities | (8.3) | (10.8)
Net funded balance | $ (9.4) | $ (12.1)

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