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Inventories (Tables)
 9 Months Ended
Sep. 30, 2017
Inventories  
Major classes of inventory

 

 

 

 

 

 

 

 

 

 

 

 

 

 

September 30,

 

December 31,

 

September 30,

 

 

 

    

2017

    

2016

    

2016

   

 

Finished goods

 

$

875

 

$

827

 

$

892

 

 

Raw materials

 

 

129

 

 

118

 

 

127

 

 

Operating supplies

 

 

42

 

 

38

 

 

38

 

 

 

 

$

1,046

 

$

983

 

$

1,057