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Earnings Per Share (Tables)
 9 Months Ended
Sep. 30, 2016
Earnings Per Share [Abstract]  
Basic and Diluted EPS
The following table presents the calculation of basic and diluted EPS:
 
Three Months Ended
 
Nine Months Ended
 
September 30,
 
September 30,
 
2016
 
2015
 
2016
 
2015
Net income from continuing operations
$
107.8

 
$
119.0

 
$
316.1

 
$
345.9

Loss from discontinued operations, net of income taxes
(0.5
)
 
(0.5
)
 
(0.9
)
 
(0.8
)
Net income
$
107.3

 
$
118.5

 
$
315.2

 
$
345.1

 
 
 
 
 
 
 
 
Weighted average common shares outstanding used in calculating basic EPS
101.9

 
112.4

 
103.8

 
113.3

Effect of dilutive stock options
0.7

 
1.2

 
0.7

 
1.3

Weighted average common shares outstanding used in calculating diluted EPS
102.6

 
113.6

 
104.5

 
114.6

 
 
 
 
 
 
 
 
Basic EPS amounts(1):
 
 
 
 
 
 
 
Continuing operations
$
1.06

 
$
1.06

 
$
3.05

 
$
3.05

Discontinued operations
$
—

 
$
—

 
$
(0.01
)
 
$
(0.01
)
Net income
$
1.05

 
$
1.05

 
$
3.04

 
$
3.05

 
 
 
 
 
 
 
 
Diluted EPS amounts(1):
 
 
 
 
 
 
 
Continuing operations
$
1.05

 
$
1.05

 
$
3.02

 
$
3.02

Discontinued operations
$
—

 
$
—

 
$
(0.01
)
 
$
(0.01
)
Net income
$
1.05

 
$
1.04

 
$
3.02

 
$
3.01

(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:
 
Three Months Ended
 
Nine Months Ended
 
September 30,
 
September 30,
 
2016
 
2015
 
2016
 
2015
Anti-dilutive options excluded from the computation of diluted earnings per share
3.0

 
0.9

 
2.9

 
0.7