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Earnings (Loss) Per Share
 3 Months Ended
Mar. 31, 2013
Earnings Per Share [Abstract]  
Earnings (Loss) Per Share
Earnings (Loss) 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 Net Income (Loss) were as follows (in millions, except per share data):
 
 
For the Three Months Ended March 31,
 
2013
 
2012
Net income (loss)
$
8.0

 
$
(6.1
)
Add: Loss from discontinued operations
7.8

 
15.4

Income from continuing operations
$
15.8

 
$
9.3

 
 
 
 
Weighted-average shares outstanding – basic
50.3

 
50.9

Effect of diluted securities attributable to stock-based payments
0.7

 
—

Weighted-average shares outstanding – diluted
51.0

 
50.9

 
 
 
 
Earnings per share – Basic:
 
 
 
Income from continuing operations
$
0.32

 
$
0.18

Loss from discontinued operations
(0.16
)
 
(0.30
)
Net income (loss)
$
0.16

 
$
(0.12
)
 
 
 
 
Earnings per share – Diluted:
 
 
 
Income from continuing operations
$
0.31

 
$
0.18

Loss from discontinued operations
(0.15
)
 
(0.30
)
Net income (loss)
$
0.16

 
$
(0.12
)


Not included in the 2012 computation of diluted loss per share were 0.6 million shares of potentially dilutive securities, including performance share units, restricted stock units and stock appreciation rights. These shares would be anti-dilutive due to the loss position for the period. Additionally, 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 Three Months Ended March 31,
 
2013
 
2012
Weighted-average number of shares
0.4

 
1.1

Price ranges per share
$51.11 - $51.40

 
$34.06 - $46.78