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Earnings Per Share
 12 Months Ended
Dec. 31, 2015
Earnings Per Share [Abstract]  
Earnings Per Share
Earnings Per Share:

Basic earnings per share are computed by dividing net income by the weighted-average number of common shares outstanding during the period. Diluted earnings per share are computed by dividing net income by the sum of the weighted-average number of shares and the number of equivalent shares assumed outstanding, if dilutive, under our stock-based compensation plans.

The computations of basic and diluted earnings per share for Income from continuing operations were as follows (in millions, except per share data):
 
 
For the Years Ended December 31,
 
2015
 
2014
 
2013
Net income
$
186.6

 
$
205.8

 
$
171.8

Add: Loss from discontinued operations
0.6

 
2.3

 
8.1

Income from continuing operations
$
187.2

 
$
208.1

 
$
179.9

 
 
 
 
 
 
Weighted-average shares outstanding – basic
44.9

 
47.9

 
49.8

Add: Potential effect of diluted securities attributable to stock-based payments
0.7

 
0.7

 
0.8

Weighted-average shares outstanding – diluted
45.6

 
48.6

 
50.6

 
 
 
 
 
 
Earnings per share - Basic:
 
 
 
 
 
Income from continuing operations
$
4.17

 
$
4.35

 
$
3.61

Loss from discontinued operations
(0.01
)
 
(0.05
)
 
(0.16
)
Net income
$
4.16

 
$
4.30

 
$
3.45

 
 
 
 
 
 
Earnings per share - Diluted:
 
 
 
 
 
Income from continuing operations
$
4.11

 
$
4.28

 
$
3.55

Loss from discontinued operations
(0.02
)
 
(0.05
)
 
(0.16
)
Net income
$
4.09

 
$
4.23

 
$
3.39


The following stock appreciation rights were outstanding but not included in the diluted earnings per share calculation because the assumed exercise of such rights would have been anti-dilutive (in millions, except for per share data):
 
For the Years Ended December 31,
 
2015
 
2014
 
2013
Weighted-average number of shares
—

 
0.3

 
0.1

Price ranges per share
$
—

 
$81.11 - $92.64

 
$81.11 - $81.14