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Inventories
6 Months Ended
Jun. 30, 2017
Inventory Disclosure [Abstract]  
Inventories

F. Inventories

 

     June 30,
2017
     December 31,
2016
 

Finished goods

   $ 652      $ 625  

Work-in-process

     1,300        1,144  

Purchased raw materials

     383        408  

Operating supplies

     81        76  
  

 

 

    

 

 

 

Total inventories

   $ 2,416      $ 2,253  
  

 

 

    

 

 

 

 

At June 30, 2017 and December 31, 2016, the total amount of inventories valued on a LIFO basis was $1,057 and $947, respectively. If valued on an average-cost basis, total inventories would have been $401 and $371 higher at June 30, 2017 and December 31, 2016, respectively.