Fair Value - Schedule of Assets and Liabilities Measured at Fair Value on Recurring Basis (Detail) - Fair Value, Measurements, Recurring - USD ($) $ in Millions	Nov. 30, 2025		May 31, 2025
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets	$ 3.4		$ 5.6
Liabilities	1.3		3.7
Derivative Instruments
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets	3.4	[1]	5.6	[2]
Liabilities	1.3	[1]	3.7	[2]
Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets	3.4		5.6
Liabilities	1.3		3.7
Level 2 | Derivative Instruments
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets	3.4	[1]	5.6	[2]
Liabilities	$ 1.3	[1]	$ 3.7	[2]

[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 13 – Derivative Financial Instruments and Hedging Activities” for additional information regarding the use of derivative financial instruments.   There were no transfers between Level 1 and Level 2 and no transfers in or out of Level 3 during the three months ended November 30, 2025.

[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 13 – Derivative Financial Instruments and Hedging Activities” for additional information regarding the use of derivative financial instruments.