Combined Statements of Earnings - USD ($) $ in Millions		3 Months Ended		6 Months Ended
		Nov. 30, 2023	Nov. 30, 2022	Nov. 30, 2023	Nov. 30, 2022
Income Statement [Abstract]
Net sales		$ 808.0	$ 868.4	$ 1,713.8	$ 1,943.0
Cost of goods sold		747.8	833.9	1,525.1	1,819.9
Gross margin		60.2	34.5	188.7	123.1
Selling, general and administrative expense		54.1	50.7	107.9	98.0
Impairment of long-lived assets		0.0	0.0	1.4	0.3
Restructuring and other income, net		0.0	(4.3)	0.0	(4.2)
Separation costs		14.9	8.0	18.5	8.0
Operating income (loss)		(8.8)	(19.9)	60.9	21.0
Other income (expense):
Miscellaneous income (expense), net		0.6	0.9	1.5	1.1
Interest expense, net		(0.2)	(0.9)	(0.7)	(2.2)
Equity in net income of unconsolidated affiliates		3.8	1.9	12.8	3.7
Earnings (loss) before income taxes		(4.6)	(18.0)	74.5	23.6
Income tax expense (benefit)		(2.5)	(5.5)	14.5	4.8
Net earnings (loss)		(2.1)	(12.5)	60.0	18.8
Net earnings attributable to noncontrolling interests		3.9	3.3	7.5	4.4
Net earnings (loss) attributable to controlling interest		$ (6.0)	$ (15.8)	$ 52.5	$ 14.4
Basic
Weighted average common shares outstanding	[1]	49,300,000	49,300,000	49,300,000	49,300,000
Earnings (loss) per common share attributable to controlling interest		$ (0.12)	$ (0.32)	$ 1.07	$ 0.29
Diluted
Weighted average common shares outstanding	[1]	49,300,000	49,300,000	49,300,000	49,300,000
Earnings (loss) per common share attributable to controlling interest		$ (0.12)	$ (0.32)	$ 1.07	$ 0.29
Common shares outstanding at end of period	[1]	49,286,517	49,300,000	49,286,517	49,300,000

[1] Reported Weighted average common shares outstanding and Common shares outstanding at end of period reflect basic shares at the Separation date. This share amount is being utilized for the calculation of basic and diluted Earnings (loss) per share for periods presented through the separation date.