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Inventories (Tables)
 3 Months Ended
Mar. 31, 2011
Inventories (Tables) [Abstract]  
Inventories
                 
         March 31,
2011		     December 31,
2010		  
    (Unaudited)          
Products
               
 
               
Nickel (co-products and by-products)
    2,161       1,310  
Iron ore and pellets
    794       825  
Manganese and ferroalloys
    204       203  
Fertilizer
    237       171  
Copper concentrate
    93       28  
Coal
    61       74  
Others
    116       143  
Spare parts and maintenance supplies
    1,144       1,544  
 
           
 
    4,810       4,298