Earnings Per Share (Tables)

12 Months Ended

Sep. 30, 2025

Earnings Per Share [Abstract]

Computation of basic and diluted earnings per share

	Year Ended September 30,
	2025		2024		2023
Net earnings	$	216.2	$	246.5	$	165.5
shares in millions
Weighted-average shares for basic earnings per share	126.9		130.3		133.0
Effect of dilutive securities:
Stock options	0.2		0.2		0.1
Restricted stock units	0.3		0.3		0.3
Performance-based restricted stock units	1.1		1.5		0.7
Weighted-average shares for diluted earnings per share	128.5		132.3		134.1
Basic earnings per share	$	1.70	$	1.89	$	1.24
Diluted earnings per share	$	1.68	$	1.86	$	1.23

Antidilutive securities excluded from computation of earnings per share

	Year Ended September 30,
shares in millions	2025	2024	2023
Restricted stock units	0.1	—	0.1
Performance-based restricted stock units	—	—	0.1