SCHEDULE II - Valuation and Qualifying Accounts (Detail) - Allowance for Doubtful Accounts - USD ($) $ in Millions	12 Months Ended
	May 31, 2024	May 31, 2023	May 31, 2022
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Period	$ 2.6	$ 0.8	$ 0.1
Charged to Costs and Expenses	1.1	1.6	0.7
Adjustments to Allowance	(0.5)	0.2	0.0
Balance at End of Period	$ 3.2	$ 2.6	$ 0.8