Net Earnings Per Share (Tables)

9 Months Ended

Sep. 30, 2023

Earnings Per Share [Abstract]

Calculations of Net Earnings (Loss) Per Share - Basic and Diluted

The calculations of net earnings per share - basic and net earnings per share - diluted were as follows:

	Three Months Ended				Nine Months Ended
	September 30,				September 30,
	2023		2022		2023		2022
Net earnings available to common shareholders	$	30.3	$	111.3	$	173.3	$	325.1
Weighted-average common shares outstanding (in millions)
Weighted-average common shares outstanding - basic		49.5		51.7		50.1		52.6
Effect of dilutive securities - share-based awards		0.6		0.6		0.6		0.7
Weighted-average common shares outstanding - diluted		50.1		52.3		50.7		53.3
Net earnings per share - basic	$	0.61	$	2.15	$	3.46	$	6.18
Net earnings per share - diluted	$	0.60	$	2.13	$	3.42	$	6.10