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INVENTORIES
12 Months Ended
Dec. 31, 2019
Inventory Disclosure [Abstract]  
INVENTORIES
INVENTORIES
 
December 31,
(Dollars in millions)
2019
 
2018
 
 
 
 
Finished goods
$
1,114

 
$
1,143

Work in process
220

 
262

Raw materials and supplies
576

 
515

Total inventories at FIFO or average cost
1,910

 
1,920

Less: LIFO reserve
248

 
337

Total inventories
$
1,662

 
$
1,583



Inventories valued on the LIFO method were approximately 50 percent and 55 percent of total inventories at December 31, 2019 and December 31, 2018, respectively.