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Inventories (Tables)
3 Months Ended
Mar. 31, 2020
Inventory Disclosure [Abstract]  
Schedule of Components of Inventories
Inventories consisted of the following:
 
As of March 31,
2020
 
As of December 31,
2019
 
(in millions)
Raw materials
$
702

 
$
707

Finished product
1,848

 
1,953

 
2,550

 
2,660

Inventory reserves
(109
)
 
(114
)
Inventories, net
$
2,441

 
$
2,546