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Inventories
 6 Months Ended
Jun. 30, 2016
Inventory Disclosure [Abstract]  
Inventories

F. Inventories

 

     June 30,
2016		      December 31,
2015		  

Finished goods

    $ 827       $ 811   

Work-in-process

      1,344         1,272   

Bauxite and alumina

      416         445   

Purchased raw materials

      650         720   

Operating supplies

      201         194   
  

 

 

     

 

 

  
   $ 3,438       $ 3,442   
  

 

 

     

 

 

  

At June 30, 2016 and December 31, 2015, the total amount of inventories valued on a LIFO basis was $1,335 and $1,373, respectively. If valued on an average-cost basis, total inventories would have been $567 and $559 higher at June 30, 2016 and December 31, 2015, respectively.