Changes in Equity - Summary of Changes in Accumulated Other Comprehensive Income (Detail) - USD ($) $ in Millions		3 Months Ended		6 Months Ended
		Nov. 30, 2023	Nov. 30, 2022	Nov. 30, 2023	Nov. 30, 2022
Accumulated Other Comprehensive Income Loss [Line Items]
Balance		$ 1,247.4	$ 1,323.2	$ 1,154.6	$ 1,266.3
Income tax effect		3.2	(0.3)	1.0	(3.3)
Balance		1,171.5	1,223.2	1,171.5	1,223.2
Foreign Currency Translation
Accumulated Other Comprehensive Income Loss [Line Items]
Balance				(10.6)	(3.8)
Other comprehensive income (loss) before reclassifications				(0.3)	(6.0)
Reclassification adjustments to net earnings	[1]			0.0	0.0
Income tax effect				0.0	0.0
Balance		(10.9)	(9.8)	(10.9)	(9.8)
Pension Liability Adjustment
Accumulated Other Comprehensive Income Loss [Line Items]
Balance				6.0	6.6
Other comprehensive income (loss) before reclassifications				0.0	0.0
Reclassification adjustments to net earnings	[1]			0.0	0.0
Income tax effect				0.0	0.0
Balance		6.0	6.6	6.0	6.6
Cash Flow Hedges
Accumulated Other Comprehensive Income Loss [Line Items]
Balance				2.5	(1.0)
Other comprehensive income (loss) before reclassifications				11.4	(21.2)
Reclassification adjustments to net earnings	[1]			(7.2)	7.1
Income tax effect				(1.0)	3.3
Balance		5.7	(11.8)	5.7	(11.8)
Accumulated Other Comprehensive Income (Loss), Net of Tax
Accumulated Other Comprehensive Income Loss [Line Items]
Balance		(10.3)	(11.5)	(2.1)	1.8
Other comprehensive income (loss) before reclassifications				11.1	(27.2)
Reclassification adjustments to net earnings	[1]			(7.2)	7.1
Income tax effect				(1.0)	3.3
Balance		$ 0.8	$ (15.0)	$ 0.8	$ (15.0)

[1] Cash flow hedges – See the disclosure in “Note N – Derivative Financial Instruments and Hedging Activities.”