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Inventories (Tables)
9 Months Ended
Sep. 30, 2022
Inventories  
Major classes of inventory

September 30,

December 31,

September 30,

    

2022

    

2021

    

2021

Finished goods

$

623

$

659

$

651

Raw materials

 

131

 

119

 

120

Operating supplies

 

38

 

38

 

37

$

792

$

816

$

808