Description of Business, The Separation, Agreements with the Former Parent and Separation Costs, and Basis of Presentation - Net Sales by Geographic Region (Details) - USD ($) $ in Millions	12 Months Ended
	May 31, 2024	May 31, 2023	May 31, 2022
Disaggregation of Revenue [Line Items]
Net sales	$ 3,430.6	$ 3,607.7	$ 4,068.9
United States
Disaggregation of Revenue [Line Items]
Net sales	2,752.0	2,892.2	3,440.0
Canada
Disaggregation of Revenue [Line Items]
Net sales	392.6	406.1	387.9
Mexico
Disaggregation of Revenue [Line Items]
Net sales	181.3	213.7	179.1
Other
Disaggregation of Revenue [Line Items]
Net sales	$ 104.7	$ 95.7	$ 61.9