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Inventories
 9 Months Ended
Sep. 30, 2018
Inventories  
Inventories

3.  Inventories

Major classes of inventory at September 30, 2018, December 31, 2017 and September 30, 2017 are as follows:

 

 

 

 

 

 

 

 

 

 

 

 

 

 

September 30,

 

December 31,

 

September 30,

 

 

 

    

2018

    

2017

    

2017

   

 

Finished goods

 

$

808

 

$

873

 

$

875

 

 

Raw materials

 

 

119

 

 

122

 

 

129

 

 

Operating supplies

 

 

46

 

 

41

 

 

42

 

 

 

 

$

973

 

$

1,036

 

$

1,046