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Inventories
6 Months Ended
Jun. 30, 2022
Inventories  
Inventories

4. Inventories

Major classes of inventory at June 30, 2022, December 31, 2021 and June 30, 2021 are as follows:

June 30,

December 31,

June 30,

    

2022

    

2021

    

2021

Finished goods

$

618

$

659

$

636

Raw materials

 

115

 

119

 

122

Operating supplies

 

42

 

38

 

38

$

775

$

816

$

796