Derivative Financial Instruments and Hedging Activities - Schedule of Fair Value of Derivative Instruments (Detail) - USD ($) $ in Millions	Feb. 28, 2026	May 31, 2025
Derivative [Line Items]
Fair Value of Assets	$ 14.7	$ 5.6
Fair Value of Liabilities	3.4	3.7
Derivatives Designated As Hedging Instruments
Derivative [Line Items]
Fair Value of Assets	1.8	0.5
Fair Value of Liabilities	2.0	1.2
Derivatives Designated As Hedging Instruments | Commodity Contracts | Cash Flow Hedges
Derivative [Line Items]
Fair Value of Assets	1.3	0.2
Fair Value of Liabilities	0.0	1.2
Derivatives Designated As Hedging Instruments | Commodity Contracts | Receivables | Cash Flow Hedges
Derivative [Line Items]
Fair Value of Assets	1.3	0.2
Derivatives Designated As Hedging Instruments | Commodity Contracts | Other Assets | Cash Flow Hedges
Derivative [Line Items]
Fair Value of Assets	0.0	0.0
Derivatives Designated As Hedging Instruments | Commodity Contracts | Other Liabilities | Cash Flow Hedges
Derivative [Line Items]
Fair Value of Liabilities	0.0	0.0
Derivatives Designated As Hedging Instruments | Foreign Currency Exchange Contracts | Cash Flow Hedges
Derivative [Line Items]
Fair Value of Assets	0.5	0.3
Fair Value of Liabilities	0.0	0.0
Derivatives Designated As Hedging Instruments | Foreign Currency Exchange Contracts | Receivables | Cash Flow Hedges
Derivative [Line Items]
Fair Value of Assets	0.5	0.3
Derivatives Designated As Hedging Instruments | Foreign Currency Exchange Contracts | Other Assets | Cash Flow Hedges
Derivative [Line Items]
Fair Value of Assets	0.0	0.0
Derivatives Designated As Hedging Instruments | Foreign Currency Exchange Contracts | Other Liabilities | Cash Flow Hedges
Derivative [Line Items]
Fair Value of Liabilities	0.0	0.0
Derivatives Designated As Hedging Instruments | Cross-currency Swap | Net Investment Hedges
Derivative [Line Items]
Fair Value of Assets	0.0	0.0
Fair Value of Liabilities	2.0	0.0
Derivatives Designated As Hedging Instruments | Cross-currency Swap | Receivables | Net Investment Hedges
Derivative [Line Items]
Fair Value of Assets	0.0	0.0
Derivatives Designated As Hedging Instruments | Cross-currency Swap | Other Assets | Net Investment Hedges
Derivative [Line Items]
Fair Value of Assets	0.0	0.0
Derivatives Designated As Hedging Instruments | Cross-currency Swap | Other Liabilities | Net Investment Hedges
Derivative [Line Items]
Fair Value of Liabilities	2.0	0.0
Derivatives Not Designated As Hedging Instruments
Derivative [Line Items]
Fair Value of Assets	12.9	5.1
Fair Value of Liabilities	1.4	2.5
Derivatives Not Designated As Hedging Instruments | Commodity Contracts | Cash Flow Hedges
Derivative [Line Items]
Fair Value of Assets	3.8	1.5
Fair Value of Liabilities	1.4	2.5
Derivatives Not Designated As Hedging Instruments | Commodity Contracts | Receivables | Cash Flow Hedges
Derivative [Line Items]
Fair Value of Assets	3.7	1.5
Derivatives Not Designated As Hedging Instruments | Commodity Contracts | Other Assets | Cash Flow Hedges
Derivative [Line Items]
Fair Value of Assets	0.1	0.0
Derivatives Not Designated As Hedging Instruments | Commodity Contracts | Other Liabilities | Cash Flow Hedges
Derivative [Line Items]
Fair Value of Liabilities	0.2	0.0
Derivatives Not Designated As Hedging Instruments | Foreign Currency Exchange Contracts | Cash Flow Hedges
Derivative [Line Items]
Fair Value of Assets	9.1	3.6
Fair Value of Liabilities	0.0	0.0
Derivatives Not Designated As Hedging Instruments | Foreign Currency Exchange Contracts | Receivables | Cash Flow Hedges
Derivative [Line Items]
Fair Value of Assets	9.1	3.6
Derivatives Not Designated As Hedging Instruments | Foreign Currency Exchange Contracts | Other Assets | Cash Flow Hedges
Derivative [Line Items]
Fair Value of Assets	0.0	0.0
Derivatives Not Designated As Hedging Instruments | Foreign Currency Exchange Contracts | Other Liabilities | Cash Flow Hedges
Derivative [Line Items]
Fair Value of Liabilities	0.0	0.0
Accounts Payable | Derivatives Designated As Hedging Instruments | Commodity Contracts | Cash Flow Hedges
Derivative [Line Items]
Fair Value of Liabilities	0.0	1.2
Accounts Payable | Derivatives Designated As Hedging Instruments | Foreign Currency Exchange Contracts | Cash Flow Hedges
Derivative [Line Items]
Fair Value of Liabilities	0.0	0.0
Accounts Payable | Derivatives Designated As Hedging Instruments | Cross-currency Swap | Net Investment Hedges
Derivative [Line Items]
Fair Value of Liabilities	0.0	0.0
Accounts Payable | Derivatives Not Designated As Hedging Instruments | Commodity Contracts | Cash Flow Hedges
Derivative [Line Items]
Fair Value of Liabilities	1.2	2.5
Accounts Payable | Derivatives Not Designated As Hedging Instruments | Foreign Currency Exchange Contracts | Cash Flow Hedges
Derivative [Line Items]
Fair Value of Liabilities	$ 0.0	$ 0.0