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Inventories
3 Months Ended
Mar. 31, 2023
Inventories  
Inventories

4. Inventories

Major classes of inventory at March 31, 2023, December 31, 2022 and March 31, 2022 are as follows:

March 31,

December 31,

March 31,

    

2023

    

2022

    

2022

Finished goods

$

800

$

667

$

676

Raw materials

 

171

 

137

 

121

Operating supplies

 

48

 

44

 

40

$

1,019

$

848

$

837