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Inventories, Net (Tables)
12 Months Ended
Dec. 31, 2018
Inventory Disclosure [Abstract]  
Components of Inventory
Inventories, net of reserves, by category were as follows:
 
December 31,
(Dollars in millions)
2018
 
2017
Raw materials, components and supplies
$
131

 
$
144

Work in process
47

 
47

Finished goods
847

 
1,043

 
$
1,025

 
$
1,234