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Earnings (Loss) Per Share (Tables)
 12 Months Ended
Dec. 31, 2015
Earnings Per Share [Abstract]  
Basic and Diluted EPS
The following table presents the calculation of basic and diluted EPS:
 
2015
 
2014
 
2013
Net income from continuing operations
$
443.7

 
$
419.8

 
$
375.8

Loss from discontinued operations, net of income taxes
(1.1
)
 
(1.1
)
 
(0.9
)
Net income
$
442.6

 
$
418.7

 
$
374.9

 
 
 
 
 
 
Weighted average common shares outstanding used in calculating basic EPS
112.7

 
117.3

 
121.3

Effect of dilutive stock options
1.2

 
1.6

 
2.0

Weighted average common shares outstanding used in calculating diluted EPS
113.9

 
118.9

 
123.3

 
 
 
 
 
 
Basic EPS amounts(1):
 
 
 
 
 
Continuing operations
$
3.94

 
$
3.58

 
$
3.10

Discontinued operations
$
(0.01
)
 
$
(0.01
)
 
$
(0.01
)
Net income
$
3.93

 
$
3.57

 
$
3.09

 
 
 
 
 
 
Diluted EPS amounts(1):
 
 
 
 
 
Continuing operations
$
3.90

 
$
3.53

 
$
3.05

Discontinued operations
$
(0.01
)
 
$
(0.01
)
 
$
(0.01
)
Net income
$
3.89

 
$
3.52

 
$
3.04

(1) Earnings per share amounts are calculated discretely and therefore may not add up to the total due to rounding.
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:
 
2015
 
2014
 
2013
Anti-dilutive options excluded from the computation of diluted earnings per share
0.7

 
0.6

 
0.6