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Inventories, Net (Tables)
12 Months Ended
Dec. 31, 2017
Inventory Disclosure [Abstract]  
Schedule of Inventory, Current [Table Text Block]
 
December 31,
  
2017
 
2016
 
(in millions)
Raw materials
$
531

 
$
483

Work in process
338

 
299

Finished goods
2,392

 
2,201

 
$
3,261

 
$
2,983