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INVENTORIES
3 Months Ended
Mar. 31, 2020
Inventory Disclosure [Abstract]  
INVENTORIES INVENTORIES
 March 31,December 31,
(Dollars in millions)20202019
Finished goods$1,138  $1,114  
Work in process221  220  
Raw materials and supplies548  576  
Total inventories at FIFO or average cost1,907  1,910  
Less: LIFO reserve248  248  
Total inventories$1,659  $1,662  

Inventories valued on the last-in, first-out ("LIFO") method were approximately 50 percent of total inventories at both March 31, 2020 and December 31, 2019.