Fair Value - Schedule of Assets and Liabilities Measured at Fair Value on Recurring Basis (Detail) - Fair Value, Measurements, Recurring - USD ($) $ in Millions	Feb. 29, 2024		May 31, 2023
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets	$ 3.9		$ 2.3
Liabilities	9.1		9.8
Derivative Financial Instruments
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets	3.9	[1]	2.3	[2]
Liabilities	9.1	[1]	9.8	[2]
Quoted Prices In Active Markets (Level 1)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets	0.0		0.0
Liabilities	0.0		0.0
Quoted Prices In Active Markets (Level 1) | Derivative Financial 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]
Fair Value, Inputs, Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets	3.9		2.3
Liabilities	9.1		9.8
Fair Value, Inputs, Level 2 | Derivative Financial Instruments
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets	3.9	[1]	2.3	[2]
Liabilities	9.1	[1]	9.8	[2]
Significant Unobservable Inputs (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
Significant Unobservable Inputs (Level 3) | Derivative Financial 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]

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