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INVENTORIES (Details) - USD ($)
$ in Millions
Mar. 31, 2019
Dec. 31, 2018
At FIFO or average cost (approximates current cost) [Abstract]    
Finished goods $ 1,201 $ 1,143
Work in process 260 262
Raw materials and supplies 572 515
Total inventories 2,033 1,920
Less: LIFO Reserve 329 337
Total inventories $ 1,704 $ 1,583
Inventories valued on the LIFO method 55.00% 55.00%