Comprehensive Income (Loss) - Components of Changes in AOCI (Detail) - USD ($) $ in Millions		12 Months Ended
		May 31, 2024	May 31, 2023	May 31, 2022
Accumulated Other Comprehensive Income Loss [Line Items]
Balance		$ 1,154.6	$ 1,266.4	$ 814.8
Income tax effect		0.9	(0.9)	10.3
Balance		1,117.5	1,154.6	1,266.4
Foreign Currency Translation
Accumulated Other Comprehensive Income Loss [Line Items]
Balance		(10.6)	(3.8)
Other comprehensive income (loss) before reclassifications		(1.3)	(6.8)
Reclassification adjustments to income	[1]	0.0	0.0
Income tax effect		0.0	0.0
Balance		(11.9)	(10.6)	(3.8)
Pension Liability Adjustment
Accumulated Other Comprehensive Income Loss [Line Items]
Balance		6.0	6.7
Other comprehensive income (loss) before reclassifications		3.5	(1.0)
Reclassification adjustments to income	[1]	(0.4)	0.2
Income tax effect		(0.7)	0.1
Balance		8.4	6.0	6.7
Cash Flow Hedges
Accumulated Other Comprehensive Income Loss [Line Items]
Balance		2.5	(1.0)
Other comprehensive income (loss) before reclassifications		1.6	(10.1)
Reclassification adjustments to income	[1]	(8.3)	14.6
Income tax effect		1.6	(1.0)
Balance		(2.6)	2.5	(1.0)
Accumulated Other Comprehensive Income (Loss)
Accumulated Other Comprehensive Income Loss [Line Items]
Balance		(2.1)	1.9	38.4
Other comprehensive income (loss) before reclassifications		3.8	(17.9)
Reclassification adjustments to income	[1]	(8.7)	14.8
Income tax effect		0.9	(0.9)
Balance		$ (6.1)	$ (2.1)	$ 1.9

[1] The statement of earnings classification of amounts reclassified to net income include: (1) Pension liability adjustment – As disclosed in “Note L – Employee Retirement Plans”; and (2) Cash flow hedges – disclosed in “Note P – Derivative Financial Instruments and Hedging Activities.”