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Inventories, Net (Tables)
6 Months Ended
Jun. 30, 2019
Inventory, Net [Abstract]  
Inventories, net
  
June 30, 2019
 
December 31, 2018
 
(in millions)
Raw materials
$
217

 
$
217

Work in process
98

 
70

Finished goods
1,536

 
1,492

 
$
1,851

 
$
1,779