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INVENTORIES (Details) - USD ($)
$ in Millions
Mar. 31, 2020
Dec. 31, 2019
At FIFO or average cost (approximates current cost) [Abstract]    
Finished goods $ 1,138 $ 1,114
Work in process 221 220
Raw materials and supplies 548 576
Total inventories at FIFO or average cost 1,907 1,910
Less: LIFO reserve 248 248
Total inventories $ 1,659 $ 1,662
Inventories valued on the LIFO method 50.00% 50.00%