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INVENTORIES (Tables)
12 Months Ended
Dec. 31, 2020
Inventory Disclosure [Abstract]  
Schedule of Inventories
 December 31,
(Dollars in millions)20202019
  
Finished goods$891 $1,114 
Work in process203 220 
Raw materials and supplies511 576 
Total inventories at FIFO or average cost1,605 1,910 
Less: LIFO reserve226 248 
Total inventories$1,379 $1,662