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INVENTORIES (Tables)
9 Months Ended
Sep. 30, 2020
Inventory Disclosure [Abstract]  
Schedule of inventories
 September 30,December 31,
(Dollars in millions)20202019
Finished goods$873 $1,114 
Work in process191 220 
Raw materials and supplies510 576 
Total inventories at FIFO or average cost1,574 1,910 
Less: LIFO reserve236 248 
Total inventories$1,338 $1,662