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Inventories
6 Months Ended
Jun. 30, 2018
Inventory Disclosure [Abstract]  
Inventories
Inventories
Inventories consist of the following components:
 
June 30
 
December 31
 
2018
 
2017
 
(Dollars in Millions)
Raw materials
$
130

 
$
127

Work-in-process
35

 
31

Finished products
32

 
31

 
$
197

 
$
189