Consolidated Statements of Operations - USD ($) shares in Millions, $ in Millions	12 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2020
Income Statement [Abstract]
Net sales	$ 1,371.5	$ 1,247.1	$ 988.3
Cost of goods sold	949.7	860.9	650.3
Gross profit	421.8	386.2	338.0
Selling, general and administrative expenses	189.7	167.1	151.8
Amortization of intangible assets	19.7	51.2	22.2
Other operating income, net	0.0	(0.1)	0.0
Operating profit	212.4	168.0	164.0
Interest expense, net	49.2	43.2	54.7
Loss on extinguishment and refinancing of debt, net	17.6	1.6	0.0
Earnings before income taxes	145.6	123.2	109.3
Income tax expense	29.6	8.8	9.2
Net earnings including redeemable noncontrolling interest	116.0	114.4	100.1
Net earnings attributable to redeemable noncontrolling interest	33.7	86.8	76.6
Net earnings available to common stockholders	$ 82.3	$ 27.6	$ 23.5
Earnings per common share, basic (in usd per share)	$ 0.88	$ 0.70	$ 0.60
Earnings per common share, diluted (in usd per share)	$ 0.88	$ 0.70	$ 0.60
Weighted-Average common shares outstanding, basic (in shares)	93.5	39.5	39.4
Weighted-Average common shares outstanding, diluted (in shares)	93.8	39.7	39.5