Income Taxes (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Nov. 30, 2023	Nov. 30, 2022	Nov. 30, 2023	Nov. 30, 2022	May 31, 2023
Income Tax Disclosure [Abstract]
Unrecognized tax benefits	$ 31.3		$ 31.3		$ 29.3
Effective tax rate	20.90%	22.10%	20.10%	18.40%