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Resolution Of Remaining Chapter 11 Disputed Claims (Tables)
 12 Months Ended
Dec. 31, 2012
Resolution Of Remaining Chapter 11 Disputed Claims [Abstract]  
Changes In The Remaining Net Disputed Claims Liability
(in millions)
  
 
Balance at December 31, 2011
$
848      
Interest accrued
        
27      
Less: supplier settlements
        
(33)      
Balance at December 31, 2012
$
842