Derivative Financial Instruments and Hedging Activities - Schedule of Summary of Derivative Hedges (Detail) - USD ($) $ in Millions	3 Months Ended		12 Months Ended
	Aug. 31, 2025	Aug. 31, 2024	May 31, 2025
Derivative [Line Items]
Notional Amount	$ 2.6	$ (2.8)
Commodity Contracts | Derivatives Not Designated As Hedging Instruments
Derivative [Line Items]
Notional Amount	$ 9.8		$ 16.4
Commodity Contracts | Minimum | Derivatives Not Designated As Hedging Instruments
Derivative [Line Items]
Maturity Date	Sep. 30, 2025		Jun. 30, 2025
Commodity Contracts | Maximum | Derivatives Not Designated As Hedging Instruments
Derivative [Line Items]
Maturity Date	Nov. 30, 2026		Sep. 30, 2026
Foreign Currency Exchange Contracts | Derivatives Not Designated As Hedging Instruments
Derivative [Line Items]
Notional Amount	$ 3.5		$ (3.6)
Foreign Currency Exchange Contracts | Minimum | Derivatives Not Designated As Hedging Instruments
Derivative [Line Items]
Maturity Date	Sep. 30, 2025		Jun. 30, 2025
Cash Flow Hedges | Commodity Contracts
Derivative [Line Items]
Notional Amount	$ (4.6)		$ (5.6)
Cash Flow Hedges | Commodity Contracts | Minimum
Derivative [Line Items]
Maturity Date	Sep. 30, 2025		Jun. 30, 2025
Cash Flow Hedges | Commodity Contracts | Maximum
Derivative [Line Items]
Maturity Date	Sep. 30, 2025		Sep. 30, 2026
Cash Flow Hedges | Foreign Currency Exchange Contracts
Derivative [Line Items]
Notional Amount	$ 9.8		$ 10.3
Cash Flow Hedges | Foreign Currency Exchange Contracts | Minimum
Derivative [Line Items]
Maturity Date	Sep. 30, 2025		Jun. 30, 2025
Cash Flow Hedges | Foreign Currency Exchange Contracts | Maximum
Derivative [Line Items]
Maturity Date	Jun. 30, 2026		Mar. 31, 2026
Cash Flow Hedges | Interest Rate Contracts
Derivative [Line Items]
Notional Amount	$ 7.6
Cash Flow Hedges | Interest Rate Contracts | Minimum
Derivative [Line Items]
Maturity Date	May 31, 2026
Cash Flow Hedges | Interest Rate Contracts | Maximum
Derivative [Line Items]
Maturity Date	Mar. 31, 2030