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Employee Benefit Plans (Details) - Schedule of expected future benefit payments
$ in Millions
May 31, 2018
USD ($)
Other Postretirement Benefits [Member]  
Defined Benefit Plan, Expected Future Benefit Payment [Abstract]  
2017 $ 2.1
2018 2.1
2019 2.2
2020 2.2
2021 2.2
2022-2026 10.4
Medicare Subsidy Receipts  
2017 0.2
2018 0.2
2019 0.2
2020 0.2
2021 0.2
2022-2026 1.3
U.K. [Member] | Pension Plans [Member]  
Defined Benefit Plan, Expected Future Benefit Payment [Abstract]  
2017 1.1
2018 1.0
2019 0.9
2020 1.4
2021 1.3
2022-2026 $ 7.7