Consolidated and Combined Statements of Earnings - USD ($) shares in Millions, $ in Millions		12 Months Ended
		May 31, 2025	May 31, 2024	May 31, 2023
Income Statement [Abstract]
Net sales		$ 3,093.3	$ 3,430.6	$ 3,607.7
Cost of goods sold		2,704.7	2,990.8	3,271.2
Gross margin		388.6	439.8	336.5
Selling, general and administrative expense		231.6	224.4	200.8
Impairment of assets		7.4	1.4	2.1
Restructuring and other (income) expense, net		2.6	0.0	(4.2)
Separation costs		0.0	19.5	17.5
Operating income		147.0	194.5	120.3
Other income (expense):
Miscellaneous income, net		3.8	5.3	3.7
Interest expense, net		(7.1)	(6.0)	(3.0)
Equity in net income of unconsolidated affiliate		4.4	22.4	7.7
Earnings before income taxes		148.1	216.2	128.7
Income tax expense		28.8	46.1	29.0
Net earnings		119.3	170.1	99.7
Net earnings attributable to noncontrolling interests	[1]	8.6	15.4	12.6
Net earnings attributable to controlling interest		$ 110.7	$ 154.7	$ 87.1
Basic
Weighted average common shares outstanding		49.5	49.3	49.3
Earnings per common share attributable to controlling interest		$ 2.24	$ 3.14	$ 1.77
Diluted
Weighted average common shares outstanding		50.5	49.8	49.3
Earnings per common share attributable to controlling interest		$ 2.19	$ 3.11	$ 1.77

[1] Net earnings attributable to noncontrolling interests are not taxable to the Company.