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Earnings (Loss) Per Share (Tables)
12 Months Ended
Dec. 31, 2011
Earnings (Loss) Per Share [Abstract]  
Reconciliation of basic earnings (loss) per share to diluted earnings (loss) per share
                         

(millions, except share data)

  Net
Earnings
(Loss)
    Shares
(000)
    Weighted
Average
Per-Share
Amount
 

2011:

                       

Basic loss

  $ (390     103,902     $ (3.76
   

 

 

   

 

 

   

 

 

 

Diluted loss

  $ (390     103,902     $ (3.76
   

 

 

   

 

 

   

 

 

 
       

2010:

                       

Basic loss

  $ (405     100,472     $ (4.03
   

 

 

   

 

 

   

 

 

 

Diluted loss

  $ (405     100,472     $ (4.03
   

 

 

   

 

 

   

 

 

 
       

2009:

                       

Basic loss

  $ (787     99,238     $ (7.93
   

 

 

   

 

 

   

 

 

 

Diluted loss

  $ (787     99,238     $ (7.93