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Employee Benefit Plans (Details) - Schedule Of Amounts Recognized In Balance Sheet - USD ($) $ in Millions | May 31, 2020 | May 31, 2019
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Other Postretirement Benefits [Member] |  |
Defined Benefit Plan, Amounts for Asset (Liability) Recognized in Statement of Financial Position [Abstract] |  |
Current liabilities | $ (1.5) | $ (1.8)
Non-current liabilities | (19.3) | (21.6)
Net funded balance | (20.8) | (23.4)
U.K. [Member] | Pension Plans [Member] |  |
Defined Benefit Plan, Amounts for Asset (Liability) Recognized in Statement of Financial Position [Abstract] |  |
Current liabilities | 0.0 | 0.0
Non-current liabilities | (5.1) | (9.1)
Net funded balance | $ (5.1) | $ (9.1)

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