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Inventories
 3 Months Ended
Mar. 31, 2016
Inventory Disclosure [Abstract]  
Inventories

F. Inventories

 

     March 31,
2016		      December 31,
2015		  

Finished goods

    $ 846       $ 811   

Work-in-process

      1,312         1,272   

Bauxite and alumina

      423         445   

Purchased raw materials

      762         720   

Operating supplies

      206         194   
  

 

 

     

 

 

  
   $ 3,549       $ 3,442   
  

 

 

     

 

 

  

At March 31, 2016 and December 31, 2015, the total amount of inventories valued on a LIFO basis was $1,381 and $1,373, respectively. If valued on an average-cost basis, total inventories would have been $553 and $559 higher at March 31, 2016 and December 31, 2015, respectively.