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INVENTORIES (Details) - USD ($)
$ in Millions
3 Months Ended
Sep. 30, 2020
Dec. 31, 2019
At FIFO or average cost (approximates current cost) [Abstract]    
Finished goods $ 873 $ 1,114
Work in process 191 220
Raw materials and supplies 510 576
Total inventories at FIFO or average cost 1,574 1,910
Less: LIFO reserve 236 248
Total inventories $ 1,338 $ 1,662
Inventories valued on the LIFO method 50.00% 50.00%
LIFO decrement $ 10