Earnings Per Share (Tables)

9 Months Ended

Jun. 30, 2025

Earnings Per Share [Abstract]

Computation of basic and diluted earnings per share

	Three Months Ended June 30,				Nine Months Ended June 30,
	2025		2024		2025		2024
Net earnings	$	21.0	$	73.7	$	156.6	$	174.8
Weighted-average shares for basic earnings per share	126.6		130.0		127.9		130.7
Effect of dilutive securities:
Stock options	0.2		0.2		0.2		0.2
Restricted stock units	0.2		0.3		0.3		0.3
Performance-based restricted stock units	1.0		1.6		1.3		1.5
Weighted-average shares for diluted earnings per share	128.0		132.1		129.7		132.7
Basic earnings per common share	$	0.17	$	0.57	$	1.22	$	1.34
Diluted earnings per common share	$	0.16	$	0.56	$	1.21	$	1.32