Consolidated and Combined Statements of Earnings - USD ($) $ in Millions		3 Months Ended		6 Months Ended
		Nov. 30, 2024	Nov. 30, 2023	Nov. 30, 2024	Nov. 30, 2023
Income Statement [Abstract]
Net sales		$ 739.0	$ 808.0	$ 1,573.0	$ 1,713.8
Cost of goods sold		659.0	747.8	1,392.6	1,525.1
Gross margin		80.0	60.2	180.4	188.7
Selling, general and administrative expense		61.1	54.1	118.1	107.9
Impairment of long-lived assets		0.0	0.0	0.0	1.4
Separation costs		0.0	14.9	0.0	18.5
Operating income (loss)		18.9	(8.8)	62.3	60.9
Other income (expense):
Miscellaneous income (expense), net		3.8	0.6	(2.1)	1.5
Interest expense, net		(2.1)	(0.2)	(4.7)	(0.7)
Equity in net income (loss) of unconsolidated affiliate		(0.9)	3.8	0.4	12.8
Earnings (loss) before income taxes		19.7	(4.6)	55.9	74.5
Income tax expense (benefit)		3.6	(2.5)	7.6	14.5
Net earnings (loss)		16.1	(2.1)	48.3	60.0
Net earnings attributable to noncontrolling interests		3.3	3.9	7.1	7.5
Net earnings (loss) attributable to controlling interest		$ 12.8	$ (6.0)	$ 41.2	$ 52.5
Basic
Weighted average common shares outstanding	[1]	49,500,000	49,300,000	49,400,000	49,300,000
Earnings (loss) per common share attributable to controlling interest		$ 0.26	$ (0.12)	$ 0.83	$ 1.07
Diluted
Weighted average common shares outstanding	[2]	50,600,000	49,300,000	50,500,000	49,300,000
Earnings (loss) per common share attributable to controlling interest		$ 0.25	$ (0.12)	$ 0.82	$ 1.07
Common shares outstanding at end of period	[1]	49,482,982	49,300,000	49,482,982	49,300,000
Cash dividends declared per common share		$ 0.16		$ 0.32

[1] Prior to the third quarter of fiscal 2024, reported Weighted average common shares outstanding (Basic) and Common shares outstanding at end of period reflect the basic common shares at the Separation. This share amount is being utilized for the calculation of basic earnings per common share for periods presented prior to the Separation.

[2] Prior to the third quarter of fiscal 2024, reported Weighted average common shares outstanding (Diluted) reflects the basic common shares at the Separation. This share amount is being utilized for the calculation of diluted earnings per common share for periods presented prior to the Separation.