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Inventories (Tables)
6 Months Ended
Jun. 30, 2021
Inventory Disclosure [Abstract]  
Schedule of Components of Inventories
Inventories consisted of the following:
As of June 30,
2021
As of December 31, 2020
 (in millions)
Raw materials$812 $718 
Finished product2,239 2,059 
3,051 2,777 
Inventory reserves(126)(130)
Inventories, net$2,925 $2,647