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Inventories (Tables)
9 Months Ended
Sep. 30, 2021
Inventory Disclosure [Abstract]  
Schedule of Components of Inventories
Inventories consisted of the following:
As of September 30, 2021As of December 31, 2020
 (in millions)
Raw materials$822 $718 
Finished product2,226 2,059 
3,048 2,777 
Inventory reserves(126)(130)
Inventories, net$2,922 $2,647