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INVENTORIES (Details) - USD ($)
$ in Millions
Sep. 30, 2019
Dec. 31, 2018
At FIFO or average cost (approximates current cost) [Abstract]    
Finished goods $ 1,161 $ 1,143
Work in process 239 262
Raw materials and supplies 571 515
Total inventories at FIFO or average cost 1,971 1,920
Less: LIFO reserve 276 337
Total inventories $ 1,695 $ 1,583
Inventories valued on the LIFO method 50.00% 55.00%