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Inventories (Tables)
12 Months Ended
Dec. 31, 2020
Inventory Disclosure [Abstract]  
Schedule of Components of Inventories
Inventories consisted of the following:
 As of December 31,
 20202019
 (in millions)
Raw materials$718 $707 
Finished product2,059 1,953 
2,777 2,660 
Inventory reserves(130)(114)
Inventories, net$2,647 $2,546