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Inventories
12 Months Ended
Dec. 31, 2018
Inventory Disclosure [Abstract]  
Inventories
Inventories
(In millions)
2018
 
2017
Raw materials
$
569

 
$
466

Work in process
152

 
142

Finished goods
2,135

 
2,179

 
$
2,856

 
$
2,787