Earnings Per Share (Tables)

12 Months Ended

Sep. 30, 2020

Earnings Per Share [Abstract]

Computation of basic and diluted earnings per share

	Period Ended September 30, 2020
Net earnings available to Class A Common Stockholders for basic earnings per share	$	23.5
Dilutive impact of net earnings attributable to NCI	0.1
Net earnings available to Class A Common Stockholders for diluted earnings per share	$	23.6
Weighted-average shares for basic earnings per share	39.4
Total dilutive restricted stock units	0.1
Weighted-average shares for diluted earnings per share	39.5
Basic earnings per share of Class A Common Stock	$	0.60
Diluted earnings per share of Class A Common Stock	$	0.60