Income Taxes - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	May 31, 2024	May 31, 2023	May 31, 2022
Income Tax Disclosure [Abstract]
Income taxes paid	$ 423.1	$ 291.9	$ 208.5
Unrecognized tax benefits that would impact effective tax rates if recognized	32.7	29.3
Unrecognized tax benefits, interest and penalties accrued	$ 2.8	$ 3.2