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Inventories
6 Months Ended
Jun. 30, 2019
Inventories  
Inventories

3. Inventories

Major classes of inventory at June 30, 2019, December 31, 2018 and June 30, 2018 are as follows:

June 30,

December 31,

June 30,

    

2019

    

2018

    

2018

    

 

Finished goods

$

838

$

849

$

821

Raw materials

 

131

 

125

 

123

Operating supplies

 

46

 

44

 

41

$

1,015

$

1,018

$

985