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Inventories (Tables)
9 Months Ended
Sep. 30, 2020
Inventory Disclosure [Abstract]  
Schedule of Inventory Components
September 30, 2020December 31, 2019
Finished goods$539 $524 
Work-in-process683 741 
Purchased raw materials326 299 
Operating supplies44 43 
Total inventories$1,592 $1,607