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Financing Receivables (Tables)
12 Months Ended
Dec. 31, 2012
Financing Receivables Tables [Abstract]  
Long-term Financing Receivables Table
      
   2012 2011
        
   (in millions)
 Argentina(1) $ 196 $ 232
 Dominican Republic   35   49
 Brazil   8   14
 Total long-term financing receivables $ 239 $ 295