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INVENTORIES
3 Months Ended
Mar. 31, 2017
Inventory Disclosure [Abstract]  
INVENTORIES
INVENTORIES
 
March 31,
 
December 31,
(Dollars in millions)
2017
 
2016
Finished goods
$
1,058

 
$
997

Work in process
213

 
198

Raw materials and supplies
488

 
473

Total inventories at FIFO or average cost
1,759

 
1,668

Less: LIFO reserve
264

 
264

Total inventories
$
1,495

 
$
1,404



Inventories valued on the last-in, first-out ("LIFO") method were approximately 60 percent of total inventories at both March 31, 2017 and December 31, 2016.