v3.26.3
Fair Value - Schedule of Assets and Liabilities Measured at Fair Value on Recurring Basis (Detail) - Fair Value, Measurements, Recurring - USD ($)
$ in Millions
Aug. 31, 2026
May 31, 2026
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Assets $ 9.1 $ 130.8
Liabilities 10.3 6.1
Derivative Instruments    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Assets 9.1 [1] 8.6 [2]
Liabilities 10.3 [1] 6.1 [2]
Equity Securities    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Assets [3]   122.2
Level 1    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Assets 0.0 122.2
Liabilities 0.0 0.0
Level 1 | Derivative Instruments    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Assets 0.0 [1] 0.0 [2]
Liabilities 0.0 [1] 0.0 [2]
Level 1 | Equity Securities    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Assets [3]   122.2
Level 2    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Assets 9.1 8.6
Liabilities 10.3 6.1
Level 2 | Derivative Instruments    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Assets 9.1 [1] 8.6 [2]
Liabilities 10.3 [1] 6.1 [2]
Level 2 | Equity Securities    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Assets [3]   0.0
Level 3    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Assets 0.0 0.0
Liabilities 0.0 0.0
Level 3 | Derivative Instruments    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Assets 0.0 [1] 0.0 [2]
Liabilities $ 0.0 [1] 0.0 [2]
Level 3 | Equity Securities    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Assets [3]   $ 0.0
[1] The fair value of the Company’s derivative financial instruments is based on the present value of the expected future cash flows considering the risks involved, including non-performance risk, and using discount rates appropriate for the respective maturities. Market observable, Level 2 inputs are used to determine the present value of the expected future cash flows. Refer to “Note 14 – Derivative Financial Instruments and Hedging Activities” for additional information regarding the use of derivative financial instruments.
[2] The fair value of the Company’s derivative financial instruments is based on the present value of the expected future cash flows considering the risks involved, including non-performance risk, and using discount rates appropriate for the respective maturities. Market observable, Level 2 inputs are used to determine the present value of the expected future cash flows. Refer to “Note 14 – Derivative Financial Instruments and Hedging Activities” for additional information regarding the use of derivative financial instruments.
[3] The fair value of the Company’s equity securities is based upon quoted market prices in active markets.