Derivative Financial Instruments and Hedging Activities - Schedule of Summary of Derivative Hedges (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended		12 Months Ended
	Feb. 29, 2024	Feb. 28, 2023	Feb. 29, 2024	Feb. 28, 2023	May 31, 2023
Derivative [Line Items]
Notional Amount	$ (2.1)	$ (10.8)	$ (1.3)	$ (14.6)
Commodity Contracts | Derivatives Not Designated As Hedging Instruments
Derivative [Line Items]
Notional Amount			$ 37.3		$ 2.4
Commodity Contracts | Minimum | Derivatives Not Designated As Hedging Instruments
Derivative [Line Items]
Maturity Date			Mar. 31, 2024		Jun. 30, 2023
Commodity Contracts | Maximum | Derivatives Not Designated As Hedging Instruments
Derivative [Line Items]
Maturity Date			Feb. 28, 2025		Dec. 31, 2024
Cash Flow Hedges | Commodity Contracts
Derivative [Line Items]
Notional Amount	$ 40.7		$ 40.7		$ 53.0
Cash Flow Hedges | Commodity Contracts | Minimum
Derivative [Line Items]
Maturity Date			Mar. 31, 2024		Jun. 30, 2023
Cash Flow Hedges | Commodity Contracts | Maximum
Derivative [Line Items]
Maturity Date			Dec. 31, 2024		Sep. 30, 2024