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Inventories
12 Months Ended
Dec. 31, 2013
Inventory Disclosure [Abstract]  
Inventories

G. Inventories

 

December 31,

   2013      2012  

Finished goods

   $ 578       $ 542   

Work-in-process

     828         866   

Bauxite and alumina

     581         618   

Purchased raw materials

     474         536   

Operating supplies

     244         263   
  

 

 

    

 

 

 
   $ 2,705       $ 2,825   
  

 

 

    

 

 

 

At December 31, 2013 and 2012, the total amount of inventories valued on a LIFO basis was 34% and 35%, respectively. If valued on an average-cost basis, total inventories would have been $691 and $770 higher at December 31, 2013 and 2012, respectively. During the three-year period ended December 31, 2013, reductions in LIFO inventory quantities caused partial liquidations of the lower cost LIFO inventory base. These liquidations resulted in the recognition of income of $26 ($17 after-tax) in 2013, $1 ($1 after-tax) in 2012, and $2 ($1 after-tax) in 2011.