Derivative Financial Instruments and Hedging Activities - Schedule of Derivatives Designated as Cash Flow and Net Investment Hedges Hedging Instruments (Detail) - USD ($) $ in Millions	3 Months Ended			6 Months Ended
	Nov. 30, 2025	Nov. 30, 2024	Aug. 31, 2024	Nov. 30, 2025	Nov. 30, 2024
Derivative [Line Items]
Gain (Loss) Recognized in OCI	$ 1.4	$ (2.8)		$ 1.8	$ (5.3)
SG&A	70.9	61.1		138.8	118.1
Interest expense, net	2.7	2.1		5.6	4.7
Miscellaneous income (expense), net	(0.1)	3.8		0.1	(2.1)
Net earnings (loss)	21.5	16.1	$ 32.2	60.1	48.3
Reclassification out of Accumulated Other Comprehensive Income
Derivative [Line Items]
Net earnings (loss)	0.3	(2.7)		0.7	(5.3)
Cash Flow Hedges
Derivative [Line Items]
Gain (Loss) Recognized in OCI	2.1	(2.8)		2.5	(5.3)
Cash Flow Hedges | Reclassification out of Accumulated Other Comprehensive Income
Derivative [Line Items]
Net earnings (loss)	0.3	(2.7)		0.7	(5.3)
Net Investment Hedges
Derivative [Line Items]
Gain (Loss) Recognized in OCI	(0.7)			(0.7)
Net Investment Hedges | Reclassification out of Accumulated Other Comprehensive Income
Derivative [Line Items]
Net earnings (loss)	0.0			0.0
Commodity Contracts | Cash Flow Hedges
Derivative [Line Items]
Gain (Loss) Recognized in OCI	1.7	(2.7)		1.6	(5.1)
Commodity Contracts | Cash Flow Hedges | Reclassification out of Accumulated Other Comprehensive Income
Derivative [Line Items]
Cost of goods sold	0.0	(2.6)		0.0	(5.2)
Foreign Currency Exchange Contracts | Cash Flow Hedges
Derivative [Line Items]
Gain (Loss) Recognized in OCI	0.3	(0.1)		0.8	(0.2)
Foreign Currency Exchange Contracts | Cash Flow Hedges | Reclassification out of Accumulated Other Comprehensive Income
Derivative [Line Items]
Cost of goods sold	0.2	$ (0.1)		0.5	$ (0.1)
Foreign Currency Exchange Contracts | Cash Flow Hedges
Derivative [Line Items]
Gain (Loss) Recognized in OCI	0.0			0.0
Foreign Currency Exchange Contracts | Cash Flow Hedges | Reclassification out of Accumulated Other Comprehensive Income
Derivative [Line Items]
SG&A	0.0			0.1
Interest Rate Contracts | Cash Flow Hedges
Derivative [Line Items]
Gain (Loss) Recognized in OCI	0.1			0.1
Interest Rate Contracts | Cash Flow Hedges | Reclassification out of Accumulated Other Comprehensive Income
Derivative [Line Items]
Interest expense, net	0.1			0.1
Cross-currency Swap | Net Investment Hedges
Derivative [Line Items]
Gain (Loss) Recognized in OCI	(0.7)			(0.7)
Cross-currency Swap | Net Investment Hedges | Reclassification out of Accumulated Other Comprehensive Income
Derivative [Line Items]
Miscellaneous income (expense), net	$ 0.0			$ 0.0