Revenues - Allowance for Credit Losses (Details) - USD ($) $ in Millions	3 Months Ended
	Aug. 31, 2022	Aug. 31, 2021
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Accounts Receivable, Allowance for Credit Loss, Beginning Balance	$ 25.9
Provision for losses on accounts receivable	(1.5)	$ 1.6
Write-offs and other	(7.0)
Accounts Receivable, Allowance for Credit Loss, Ending Balance	$ 17.4