Equity - Summary of Changes in Accumulated Other Comprehensive Income (Loss) (Detail) - USD ($) $ in Millions		3 Months Ended		6 Months Ended
		Nov. 30, 2024	Nov. 30, 2023	Nov. 30, 2024	Nov. 30, 2023
Accumulated Other Comprehensive Income Loss [Line Items]
Balance		$ 1,143.2	$ 1,247.4	$ 1,117.5	$ 1,154.6
Income tax effect		0.3	(3.2)	0.3	(1.0)
Balance		1,145.1	1,171.5	1,145.1	1,171.5
Foreign Currency Translation
Accumulated Other Comprehensive Income Loss [Line Items]
Balance				(11.9)	(10.6)
Other comprehensive income (loss) before reclassifications				(2.7)	(0.3)
Reclassification adjustments to net earnings	[1]			0.0	0.0
Income tax effect				0.0	0.0
Balance		(14.6)	(10.9)	(14.6)	(10.9)
Pension Liability Adjustment
Accumulated Other Comprehensive Income Loss [Line Items]
Balance				8.4	6.0
Other comprehensive income (loss) before reclassifications				(4.0)	0.0
Reclassification adjustments to net earnings	[1]			2.7	0.0
Income tax effect				0.3	0.0
Balance		7.4	6.0	7.4	6.0
Cash Flow Hedges
Accumulated Other Comprehensive Income Loss [Line Items]
Balance				(2.6)	2.5
Other comprehensive income (loss) before reclassifications				(5.3)	11.4
Reclassification adjustments to net earnings	[1]			5.3	(7.2)
Income tax effect				0.0	(1.0)
Balance		(2.6)	5.7	(2.6)	5.7
Accumulated Other Comprehensive Loss
Accumulated Other Comprehensive Income Loss [Line Items]
Balance		(3.9)	(10.3)	(6.1)	(2.1)
Other comprehensive income (loss) before reclassifications				(12.0)	11.1
Reclassification adjustments to net earnings	[1]			8.0	(7.2)
Income tax effect				0.3	(1.0)
Balance		$ (9.8)	$ 0.8	$ (9.8)	$ 0.8

[1] The consolidated and combined statement of earnings classification of amounts reclassified to net income include: a. Cash flow hedges – See the disclosure in “Note 13 – Derivative Financial Instruments and Hedging Activities”; and b. Pension liability adjustment – During the second quarter of fiscal 2025, the Company, through its wholly-owned subsidiary, Tempel, purchased (using pension plan assets) an annuity contract from a third-party insurance company to transfer approximately 25% of the total projected benefit obligation of the Tempel Employees Pension Plan as of the purchase date. As a result of this transaction: 1) the Company recognized a non-cash settlement gain of $2.7 million within miscellaneous income (expense), net; 2) the Company was relieved of all responsibility for these pension obligations; and 3) the insurance company is now required to pay and administer the retirement benefits owed to 472 beneficiaries.