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Net Change in Operating Assets and Liabilities (Tables)
9 Months Ended
Sep. 30, 2012
Net Change in Operating Assets and Liabilities (Tables) [Abstract]  
Net Change in Operating Assets and Liabilities
   Nine Months Ended September 30, 
   2012 2011 
 Decrease (increase) in operating assets:      
  Trade and accounts receivable  $(7) $125 
  Inventories, stockpiles and ore on leach pads   (603)  (332) 
  EGR refinery assets   177  (855) 
  Other assets   (81)  (109) 
 Increase (decrease) in operating liabilities:      
  Accounts payable and other accrued liabilities   (291)  (3) 
  EGR refinery liabilities   (177)  855 
  Reclamation liabilities   (57)  (24) 
   $(1,039) $(343)