Derivative Financial Instruments and Hedging Activities - Schedule of Summary of Derivative Hedges (Detail) - USD ($) $ in Millions	12 Months Ended
	May 31, 2024	May 31, 2023
Derivative [Line Items]
Notional Amount	$ (0.4)	$ (11.7)
Commodity Contracts | Derivatives Not Designated As Hedging Instruments
Derivative [Line Items]
Notional Amount	$ 22.4	$ 2.4
Commodity Contracts | Minimum | Derivatives Not Designated As Hedging Instruments
Derivative [Line Items]
Maturity Date	Jun. 30, 2024	Jun. 30, 2023
Commodity Contracts | Maximum | Derivatives Not Designated As Hedging Instruments
Derivative [Line Items]
Maturity Date	Mar. 31, 2025	Dec. 31, 2024
Cash Flow Hedges | Commodity Contracts
Derivative [Line Items]
Notional Amount	$ 24.5	$ 53.0
Cash Flow Hedges | Commodity Contracts | Minimum
Derivative [Line Items]
Maturity Date	Jun. 30, 2024	Jun. 30, 2023
Cash Flow Hedges | Commodity Contracts | Maximum
Derivative [Line Items]
Maturity Date	Sep. 30, 2025	Sep. 30, 2024