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Inventories (Tables)
6 Months Ended
Jun. 30, 2019
Inventory Disclosure [Abstract]  
Schedule of Inventory, Current [Table Text Block]
Inventories, net consist of the following components:
 
June 30
 
December 31
 
2019
 
2018
 
(Dollars in Millions)
Raw materials
$
121

 
$
124

Work-in-process
23

 
26

Finished products
43

 
34

 
$
187

 
$
184