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INVENTORIES
6 Months Ended
Jun. 30, 2020
Inventory Disclosure [Abstract]  
INVENTORIES INVENTORIES
 June 30,December 31,
(Dollars in millions)20202019
Finished goods$949  $1,114  
Work in process193  220  
Raw materials and supplies514  576  
Total inventories at FIFO or average cost1,656  1,910  
Less: LIFO reserve237  248  
Total inventories$1,419  $1,662  

Inventories valued on the last-in, first-out ("LIFO") method were approximately 50 percent of total inventories at both June 30, 2020 and December 31, 2019.