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Earnings (Loss) Per Share (Tables)
 12 Months Ended
Dec. 31, 2016
Earnings Per Share [Abstract]  
Basic and Diluted EPS
The following table presents the calculation of basic and diluted EPS:
 
2016
 
2015
 
2014
Net income from continuing operations
$
431.7

 
$
443.7

 
$
419.8

Loss from discontinued operations, net of income taxes
(1.2
)
 
(1.1
)
 
(1.1
)
Net income
$
430.5

 
$
442.6

 
$
418.7

 
 
 
 
 
 
Weighted average common shares outstanding used in calculating basic EPS
103.1

 
112.7

 
117.3

Effect of dilutive stock options
0.7

 
1.2

 
1.6

Weighted average common shares outstanding used in calculating diluted EPS
103.8

 
113.9

 
118.9

 
 
 
 
 
 
Basic EPS amounts:
 
 
 
 
 
Continuing operations
$
4.19

 
$
3.94

 
$
3.58

Discontinued operations
$
(0.01
)
 
$
(0.01
)
 
$
(0.01
)
Net income
$
4.18

 
$
3.93

 
$
3.57

 
 
 
 
 
 
Diluted EPS amounts:
 
 
 
 
 
Continuing operations
$
4.16

 
$
3.90

 
$
3.53

Discontinued operations
$
(0.01
)
 
$
(0.01
)
 
$
(0.01
)
Net income
$
4.15

 
$
3.89

 
$
3.52
Anti-Dilutive Options Excluded From The Computation Of Diluted Earnings Per Share
A summary of anti-dilutive options excluded from the computation of diluted earnings per share is as follows:
 
2016
 
2015
 
2014
Anti-dilutive options excluded from the computation of diluted earnings per share
3.0

 
0.7

 
0.6