XML 65 R15.htm IDEA: XBRL DOCUMENT v2.4.0.6
EARNINGS PER SHARE
 9 Months Ended
Sep. 30, 2012
Earnings Per Share [Abstract]  
EARNINGS PER SHARE
EARNINGS PER SHARE

Basic and diluted net income per share are computed by dividing net income by the weighted average number of common shares outstanding.  Diluted net income per share reflects the dilutive effect of stock-based compensation.

 
Three Months Ended
September 30,
 
Nine Months Ended
September 30,
 
2012
 
2011
 
2012
 
2011
Computation of Income per Share
($ and shares in millions, except per share data)
Net income
$
28.7

 
$
47.2

 
$
115.0

 
$
223.0

Basic shares
80.1

 
80.2

 
80.1

 
79.9

Basic net income per share
$
0.36

 
$
0.59

 
$
1.44

 
$
2.79

Diluted shares:
 
 
 
 
 
 
 
Basic shares
80.1

 
80.2

 
80.1

 
79.9

Stock-based compensation
0.9

 
0.6

 
0.8

 
0.9

Diluted shares
81.0

 
80.8

 
80.9

 
80.8

Diluted net income per share
$
0.35

 
$
0.58

 
$
1.42

 
$
2.76


The computation of dilutive shares from stock-based compensation does not include 1.0 million shares and 1.7 million shares for the three months ended September 30, 2012 and 2011, respectively, and 1.0 million shares and 0.9 million shares for the nine months ended September 30, 2012, and 2011, respectively, as their effect would have been anti-dilutive.