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Inventories
12 Months Ended
Dec. 31, 2012
Inventories  
Inventories

3. Inventories

        Major classes of inventory are as follows:

 
  2012   2011  

Finished goods

  $ 957   $ 891  

Raw materials

    137     123  

Operating supplies

    45     47  
           

 

  $ 1,139   $ 1,061