Net Earnings Per Share (Tables)

12 Months Ended

Dec. 31, 2019

Earnings Per Share [Abstract]

Calculations of Net Earnings Per Share - Basic and Diluted

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

Year Ended December 31	2019		2018		2017
Net earnings available to common shareholders:	$	465.7	$	556.7	$	545.4
Weighted-average common shares outstanding (in millions):
Weighted-average common shares outstanding - basic		59.9		64.6		67.1
Effect of dilutive securities - stock options		—		0.1		0.2
Effect of other share-based awards		0.4		0.4		0.6
Weighted-average common shares outstanding - diluted		60.3		65.1		67.9
Net earnings per share - basic	$	7.78	$	8.62	$	8.13
Net earnings per share - diluted	$	7.72	$	8.56	$	8.04

Schedule of Antidilutive Securities

The number, exercise prices and weighted-average remaining life of these antidilutive awards were as follows:

	2019		2018		2017
Shares (in thousands)		401		264		—
Exercise price	$	99	$	109	$	—
Weighted-average remaining life	0.9 years		1.2 years			—