Revenues - Allowance for Credit Losses (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Nov. 30, 2025	Aug. 31, 2025	Nov. 30, 2025	Nov. 30, 2024
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Balance as of June 1, 2025	$ 10.9	$ 11.0	$ 11.0
Provision for losses on accounts receivable	3.1	0.7	3.8	$ 3.0
Write-offs and other	(2.3)	(0.8)
Balance as of August 31, 2025	$ 11.7	$ 10.9	$ 11.7