Net Earnings Per Share (Tables)

9 Months Ended

Sep. 30, 2018

Earnings Per Share [Abstract]

Calculations of net earnings per share basic and diluted

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

	3 Months Ended				9 Months Ended
	September 30,				September 30,
	2018		2017		2018		2017
Net earnings available to common shareholders	$	158.0	$	137.7	$	398.4	$	329.1
Weighted-average common shares outstanding (in millions)
Weighted-average common shares outstanding - basic	64.5		66.8		65.6		67.3
Effect of dilutive securities - stock options	0.1		0.2		0.1		0.2
Effect of other share-based awards	0.4		0.6		0.4		0.6
Weighted-average common shares outstanding - diluted	65.0		67.6		66.1		68.1
Net earnings per share - basic	$	2.45	$	2.06	$	6.08	$	4.89
Net earnings per share - diluted	$	2.43	$	2.04	$	6.03	$	4.84