Related Party Transactions - Schedule of reconciliation of total net transfers to and from the parent to the corresponding amount presented in the consolidated and combined statement of cash flows (Details) - USD ($) $ in Millions	12 Months Ended
	May 31, 2024	May 31, 2023	May 31, 2022
Related Party Transaction [Line Items]
Less: depreciation expense allocated from the Former Parent	$ 65.3	$ 69.6	$ 59.5
Stock-based compensation	10.3	10.4	8.7
Total net transfers from/(to) the Former Parent per consolidated and combined statement of cash flows	(47.6)	(199.8)	316.9
Former Parent
Related Party Transaction [Line Items]
Total net transfers from/(to) the Former Parent per consolidated and combined changes in equity	(32.7)	(187.3)	328.0
Less: non-cash net asset contribution from the Former Parent	7.6	0.0	0.0
Less: depreciation expense allocated from the Former Parent	1.2	2.5	3.1
Stock-based compensation	6.1	10.0	8.0
Total net transfers from/(to) the Former Parent per consolidated and combined statement of cash flows	$ (47.6)	$ (199.8)	$ 316.9