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INVENTORIES (Tables)
 6 Months Ended
Jun. 30, 2017
Inventory Disclosure [Abstract]  
Schedule of inventories
 
June 30,
 
December 31,
(Dollars in millions)
2017
 
2016
Finished goods
$
1,103

 
$
997

Work in process
220

 
198

Raw materials and supplies
478

 
473

Total inventories at FIFO or average cost
1,801

 
1,668

Less: LIFO reserve
261

 
264

Total inventories
$
1,540

 
$
1,404