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Employee Benefit Plans (Details) - Schedule Of Amounts Recognized In Balance Sheet - USD ($) $ in Millions | May 31, 2019 | May 31, 2018
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Other Postretirement Benefits [Member] |  |
Defined Benefit Plan, Amounts for Asset (Liability) Recognized in Statement of Financial Position [Abstract] |  |
Current liabilities | $ (1.8) | $ (2.2)
Non-current liabilities | (21.6) | (24.6)
Net funded balance | (23.4) | (26.8)
U.S. [Member] | Pension Plans [Member] |  |
Defined Benefit Plan, Amounts for Asset (Liability) Recognized in Statement of Financial Position [Abstract] |  |
Current liabilities |  | 0.0
Non-current liabilities |  | 0.0
Net funded balance | 0.0 | 1.6
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 | (9.1) | (9.2)
Net funded balance | (9.1) | (9.2)
Current Assets [Member] | Other Postretirement Benefits [Member] |  |
Defined Benefit Plan, Amounts for Asset (Liability) Recognized in Statement of Financial Position [Abstract] |  |
Plan assets | 0.0 | 0.0
Current Assets [Member] | U.S. [Member] | Pension Plans [Member] |  |
Defined Benefit Plan, Amounts for Asset (Liability) Recognized in Statement of Financial Position [Abstract] |  |
Plan assets |  | 1.6
Current Assets [Member] | U.K. [Member] | Pension Plans [Member] |  |
Defined Benefit Plan, Amounts for Asset (Liability) Recognized in Statement of Financial Position [Abstract] |  |
Plan assets | $ 0.0 | $ 0.0

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