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Earnings Per Share
 9 Months Ended
Sep. 30, 2012
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 Three Months Ended
September 30,
 
For the Nine Months Ended
September 30,
 
2012
 
2011
 
2012
 
2011
Net income
$
29.4

 
$
33.8

 
$
68.0

 
$
71.6

Loss from discontinued operations
(20.3
)
 
(1.1
)
 
(40.5
)
 
(11.1
)
Income from continuing operations
$
49.7

 
$
34.9

 
$
108.5

 
$
82.7

Weighted-average shares outstanding – basic
50.6

 
52.2

 
50.8

 
53.0

Effect of diluted securities attributable to stock-based payments
0.7

 
0.6

 
0.7

 
0.9

Weighted-average shares outstanding – diluted
51.3

 
52.8

 
51.5

 
53.9

Earnings per share from continuing operations:
 
 
 
 
 
 
 
Basic
$
0.98

 
$
0.67

 
$
2.13

 
$
1.56

Diluted
$
0.97

 
$
0.66

 
$
2.11

 
$
1.53


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. The details are as follows:
 
 
For the Nine Months Ended
September 30,
 
2012
 
2011
Weighted-average number of shares
386,759

 
2,275,894

Price ranges per share
$
46.78

 
$28.24 - $46.78