Earnings Per Share (Tables)

12 Months Ended

Sep. 30, 2024

Earnings Per Share [Abstract]

Computation of basic and diluted earnings per share

	Year Ended September 30,
	2024		2023		2022
Net earnings available to common stockholders for basic earnings per share	$	246.5	$	165.5	$	82.3
Dilutive impact of net earnings attributable to NCI	—		—		—
Net earnings available to common stockholders for diluted earnings per share	$	246.5	$	165.5	$	82.3
shares in millions
Weighted-average shares for basic earnings per share	130.3		133.0		93.5
Effect of dilutive securities:
Stock options	0.2		0.1		0.1
Restricted stock units	0.3		0.3		0.2
Performance-based restricted stock units	1.5		0.7		—
Weighted-average shares for diluted earnings per share	132.3		134.1		93.8
Basic earnings per share of Common Stock	$	1.89	$	1.24	$	0.88
Diluted earnings per share of Common Stock	$	1.86	$	1.23	$	0.88

Antidilutive securities excluded from computation of earnings per share

	Year Ended September 30,
shares in millions	2024	2023	2022
Restricted stock units	—	0.1	0.1
Performance-based restricted stock units	—	0.1	0.1