Earnings Per Share (Tables)

3 Months Ended

Dec. 31, 2021

Earnings Per Share [Abstract]

Computation of basic and diluted earnings per share

	Three Months Ended December 31,
	2021		2020
Net earnings available to Class A Common Stockholders for basic earnings per share	$	8.2	$	7.8
Dilutive impact of net earnings attributable to NCI	0.1		—
Net earnings available to Class A Common Stockholders for diluted earnings per share	$	8.3	$	7.8
Weighted-average shares for basic earnings per share	39.4		39.5
Total dilutive restricted stock units	0.2		0.1
Weighted-average shares for diluted earnings per share	39.6		39.6
Basic earnings per share of Class A Common Stock	$	0.21	$	0.20
Diluted earnings per share of Class A Common Stock	$	0.21	$	0.20