Earnings Per Share (Tables)

9 Months Ended

Sep. 30, 2024

Earnings Per Share [Abstract]

Computation of Basic and Diluted Earnings per Share

	Three Months Ended				Nine Months Ended
	September 30,				September 30,
(in millions, except per share data)	2024		2023		2024		2023
Net income attributable to common shareholders	$	47.1	$	51.9	$	126.5	$	138.8
Average basic shares outstanding	57.2		56.8		57.1		56.8
Effect of dilutive share-based awards	0.6		0.7		0.7		0.6
Average diluted shares outstanding	57.8		57.5		57.8		57.4
Earnings per basic share	$	0.82	$	0.91	$	2.21	$	2.44
Earnings per diluted share	$	0.81	$	0.90	$	2.19	$	2.42