Income Taxes - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	May 31, 2023	May 31, 2022	May 31, 2021
Income Tax Disclosure [Abstract]
Income taxes paid	$ 291.9	$ 208.5	$ 245.5
Unrecognized tax benefits that would impact effective tax rates if recognized	29.3	30.8
Unrecognized tax benefits, interest and penalties accrued	$ 3.2	$ 4.0