Condensed Consolidated Statements of Operations - USD ($) shares in Millions, $ in Millions	3 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Income Statement [Abstract]
Net Sales	$ 306.5	$ 282.4
Cost of goods sold	214.2	190.5
Gross Profit	92.3	91.9
Selling, general and administrative expenses	36.8	38.3
Amortization of intangible assets	4.9	5.9
Other operating income, net	0.0	(0.1)
Operating Profit	50.6	47.8
Interest expense, net	8.4	12.8
Earnings before Income Taxes	42.2	35.0
Income tax expense	2.9	2.1
Net Earnings Including Redeemable Noncontrolling Interest	39.3	32.9
Less: Net earnings attributable to redeemable noncontrolling interest	31.1	25.1
Net Earnings Available to Class A Common Stockholders	$ 8.2	$ 7.8
Earnings per Class A common share, basic (in usd per share)	$ 0.21	$ 0.20
Earnings per Class A common share, diluted (in usd per share)	$ 0.21	$ 0.20
Weighted Average Class A common shares outstanding, basic (in shares)	39.4	39.5
Weighted-Average Class A common shares outstanding, diluted (in shares)	39.6	39.6