Employee Benefit Plans - Schedule Of Amounts Recognized In Balance Sheet (Details) - USD ($) $ in Millions	May 31, 2024	May 31, 2023
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	(5.3)	(5.5)
Net funded balance	(5.3)	(5.5)
U.S. | Other Postretirement Benefits
Defined Benefit Plan, Amounts for Asset (Liability) Recognized in Statement of Financial Position [Abstract]
Current liabilities	(1.0)	(1.0)
Non-current liabilities	(6.2)	(7.0)
Net funded balance	$ (7.2)	$ (8.0)