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Inventories (Tables)
3 Months Ended
Mar. 31, 2022
Inventory Disclosure [Abstract]  
Schedule of Inventory Components
March 31, 2022December 31, 2021
Finished goods$487 $478 
Work-in-process676 631 
Purchased raw materials279 256 
Operating supplies41 37 
Total inventories$1,483 $1,402