Related Party Transactions - Schedule of reconciliation of total net transfers to and from the parent to the corresponding amount presented in the combined statement of cash flows (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Feb. 29, 2024	Feb. 28, 2023	Feb. 29, 2024	Feb. 28, 2023
Related Party Transaction [Line Items]
Less: depreciation expense allocated from the Former Parent	$ 15.9	$ 17.0	$ 49.2	$ 52.4
Stock-based compensation	2.2	2.7	8.3	7.5
Total net transfers from/(to) the Former Parent per consolidated and combined statement of cash flows	3.8	(99.5)	(47.6)	(138.7)
Former Parent
Related Party Transaction [Line Items]
Total net transfers from/(to) the Former Parent per consolidated and combined changes in equity	11.4	(96.3)	(32.7)	(129.6)
Less: non-cash net asset contribution from the Former Parent	7.6	0.0	7.6	0.0
Less: depreciation expense allocated from the Former Parent	0.0	0.5	1.2	1.8
Stock-based compensation	0.0	2.7	6.1	7.3
Total net transfers from/(to) the Former Parent per consolidated and combined statement of cash flows	$ 3.8	$ (99.5)	$ (47.6)	$ (138.7)