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INVENTORIES (Tables)
 9 Months Ended
Sep. 30, 2017
Inventory Disclosure [Abstract]  
Schedule of inventories
 
September 30,
 
December 31,
(Dollars in millions)
2017
 
2016
Finished goods
$
1,120

 
$
997

Work in process
216

 
198

Raw materials and supplies
501

 
473

Total inventories at FIFO or average cost
1,837

 
1,668

Less: LIFO reserve
261

 
264

Total inventories
$
1,576

 
$
1,404