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Incentive Compensation Plans (Tables)
 3 Months Ended
Mar. 31, 2013
Employee Service Share-based Compensation, Aggregate Disclosures [Abstract]  
Stock-based Compensation Awards
We issued the following stock-based awards under the 2009 Performance Incentive Plan (the “2009 PIP”) during the three months ended March 31, 2013.
 
Awards
 
Weighted-average
grant-date fair value
(per award)
Stock options
0.7

 
$
4.14

Stock-settled awards
0.9

 
$
12.76

Performance-based awards
1.5

 
$
11.91

Total stock-based compensation awards
3.1