Employee Benefit Plans - Schedule Of Amounts Recognized In Balance Sheet (Details) - USD ($) $ in Millions	May 31, 2022	May 31, 2021
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)