Revenues - Allowance for Credit Losses (Details) - USD ($) $ in Millions	12 Months Ended
	May 31, 2022	May 31, 2021	May 31, 2020
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	$ 21.4
Current period provision	15.2	$ 5.2	$ 15.6
Write-offs and other	(10.7)
Ending balance	$ 25.9	$ 21.4