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Earnings Per Share (Tables)
 3 Months Ended
Mar. 31, 2013
Schedule Of Basic And Diluted Earnings Per Share
                     
     Three Months Ended March 31,  

$ in millions except share and per share amounts

    2013      2012  

Net income (loss)

    $ 164        $ 10    

Basic weighted average shares(1)

      194,523,933          193,489,424    

Effect of common stock equivalents:

      

Stock options

      1,108,027          1,105,550    
  

 

 

     

 

 

  

Diluted weighted average shares

      195,631,960          194,594,974    
  

 

 

     

 

 

  

Net income (loss) per common share:

      

Basic

    $ 0.84        $ 0.05    
  

 

 

     

 

 

  

Diluted

    $ 0.84        $ 0.05    
  

 

 

     

 

 

  

 

  (1) - Includes 6,125,599 and 5,219,053 of unvested restricted stock and units that receive nonforfeitable dividends or dividend equivalents for the three months ended March 31, 2013 and 2012, respectively.