Revenues - Allowance for Credit Losses (Details) - USD ($) $ in Millions	12 Months Ended
	May 31, 2024	May 31, 2023	May 31, 2022
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	$ 16.7
Current period provision	5.2	$ 3.3	$ 15.2
Write-offs and other	(7.0)
Ending balance	$ 14.9	$ 16.7