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INVENTORIES (Tables)
 3 Months Ended
Mar. 31, 2018
Inventory Disclosure [Abstract]  
Schedule of inventories
 
March 31,
 
December 31,
(Dollars in millions)
2018
 
2017
Finished goods
$
1,031

 
$
1,114

Work in process
241

 
213

Raw materials and supplies
504

 
470

Total inventories at FIFO or average cost
1,776

 
1,797

Less: LIFO reserve
300

 
288

Total inventories
$
1,476

 
$
1,509