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INVENTORIES (Details) - USD ($)
$ in Millions
Jun. 30, 2019
Dec. 31, 2018
At FIFO or average cost (approximates current cost) [Abstract]    
Finished goods $ 1,205 $ 1,143
Work in process 252 262
Raw materials and supplies 573 515
Total inventories at FIFO or average cost 2,030 1,920
Less: LIFO reserve 300 337
Total inventories $ 1,730 $ 1,583
Inventories valued on the LIFO method 55.00% 55.00%