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Inventories
 6 Months Ended
Jun. 30, 2016
Inventories  
Inventories

3.  Inventories

 

Major classes of inventory at  June 30, 2016, December 31, 2015 and June 30, 2015 are as follows:

 

 

 

 

 

 

 

 

 

 

 

 

 

 

June 30,

 

December 31,

 

June 30,

 

 

    

2016

    

2015

    

2015

 

Finished goods

 

$
892

 

$
858

 

$
842

 

Raw materials

 

 
121

 

 
113

 

 
103

 

Operating supplies

 

 
38

 

 
36

 

 
40

 

 

 

$
1,051

 

$
1,007

 

$
985