Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Mar. 31, 2022	Mar. 31, 2021
Earnings Per Share, Diluted, by Common Class, Including Two Class Method
Net earnings available to common stockholders for basic earnings per share	$ 1.3	$ 0.6	$ 9.5	$ 8.4
Dilutive impact of net earnings attributable to NCI	0.0	0.0	0.0	0.0
Net earnings available to common stockholders for diluted earnings per share	$ 1.3	$ 0.6	$ 9.5	$ 8.4
Weighted Average shares of Common Stock Outstanding, basic (in shares)	62.7	39.5	51.0	39.5
Dilutive restricted stock units, (in shares)	0.2	0.2	0.2	0.1
Weighted-Average Class A common shares outstanding, diluted (in shares)	62.9	39.7	51.2	39.6
Earnings per share of Common Stock, basic (in USD per share)	$ 0.02	$ 0.02	$ 0.19	$ 0.21
Earnings per share of Common Stock, diluted (in USD per share)	$ 0.02	$ 0.02	$ 0.19	$ 0.21
Common Class A
Earnings Per Share, Diluted, by Common Class, Including Two Class Method
Antidilutive securities excluded from computation of earnings per share, amount	0.3	0.2	0.2	0.3