XML 41 R29.htm IDEA: XBRL DOCUMENT v3.20.2
Inventories (Tables)
9 Months Ended
Sep. 30, 2020
Inventories  
Major classes of inventory

September 30,

December 31,

September 30,

    

2020

    

2019

    

2019

    

 

Finished goods

$

625

$

872

$

836

Raw materials

 

121

 

128

 

134

Operating supplies

 

36

 

45

 

45

$

782

$

1,045

$

1,015