Earnings (Loss) Per Share (Tables)

12 Months Ended

Dec. 31, 2018

Earnings Per Share [Abstract]

Basic and Diluted EPS

The following table presents the calculation of basic and diluted EPS:

	2018		2017			2016
Net income from continuing operations	$	395.9	$	435.0		$	431.7
Income (loss) from discontinued operations, net of income taxes	0.1		(0.4		)	(1.2		)
Net income	$	396.0	$	434.6		$	430.5
Weighted average common shares outstanding used in calculating basic EPS	90.9		97.8			103.1
Effect of dilutive stock options and unvested RSUs	0.4		0.4			0.7
Weighted average common shares outstanding used in calculating diluted EPS	91.3		98.2			103.8
Basic EPS amounts(1):
Continuing operations	$	4.36	$	4.45		$	4.19
Discontinued operations	$	—	$	—		$	(0.01	)
Net income	$	4.36	$	4.44		$	4.18
Diluted EPS amounts(1):
Continuing operations	$	4.34	$	4.43		$	4.16
Discontinued operations	$	—	$	—		$	(0.01	)
Net income	$	4.34	$	4.43		$	4.15
(1) Earnings per share amounts are calculated discretely and therefore may not add up to the total due to rounding.

Anti-Dilutive Equity Instruments Excluded From The Computation Of Diluted Earnings Per Share

A summary of anti-dilutive equity instruments excluded from the computation of diluted earnings per share is as follows:

	2018	2017	2016
Anti-dilutive equity instruments excluded from the computation of diluted earnings per share	2.3	3.1	3.0