XML 54 R12.htm IDEA: XBRL DOCUMENT v3.19.3.a.u2
Inventories
12 Months Ended
Dec. 31, 2019
Inventories  
Inventories

4. Inventories

Major classes of inventory are as follows:

    

2019

    

2018

 

Finished goods

$

872

$

849

Raw materials

 

128

 

125

Operating supplies

 

45

 

44

$

1,045

$

1,018