Segment Information - Schedule of Significant Expenses Provided to CODM for Reportable Segment (Details) - USD ($) $ in Millions		3 Months Ended					9 Months Ended
		Feb. 28, 2026	Nov. 30, 2025	Feb. 28, 2025	Nov. 30, 2024	Aug. 31, 2024	Feb. 28, 2026	Feb. 28, 2025
Segment Reconciliation [Abstract]
Net sales		$ 769.8		$ 687.4			$ 2,514.6	$ 2,260.4
Cost of goods sold:
Material cost		521.8		457.0			1,706.0	1,538.0
Direct labor, manufacturing expenses, and other	[1]	171.9		149.2			524.1	460.8
Total cost of goods sold		693.7		606.2			2,230.1	1,998.8
Gross margin		76.1		81.2			284.5	261.6
Selling, general and administrative expense		77.5		54.6			216.3	172.7
Impairment of assets		1.5	$ 0.6	7.4			2.1	7.4
Restructuring and other (income),) expense, net		(6.0)		0.9			(7.0)	0.9
Operating income		3.1		18.3			73.1	80.6
Other income (expense):
Miscellaneous income (expense), net		9.8		0.2			9.9	(1.9)
Interest expense, net		(2.1)		(1.4)			(7.7)	(6.1)
Equity in net income of unconsolidated affiliate		3.5		0.0			16.7	0.4
Earnings before income taxes		14.3		17.1			92.0	73.0
Income tax expense		3.5		5.0			21.1	12.6
Net earnings		10.8		12.1	$ 16.1	$ 32.2	70.9	60.4
Net earnings (loss) attributable to noncontrolling interests		0.4		(1.7)			4.9	5.4
Net earnings attributable to controlling interest		$ 10.4		$ 13.8			$ 66.0	$ 55.0

[1] Includes expenses related to manufacturing profit sharing and bonus.