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INVENTORIES (Details) - USD ($)
$ in Millions
Jun. 30, 2018
Dec. 31, 2017
At FIFO or average cost (approximates current cost) [Abstract]    
Finished goods $ 1,044 $ 1,114
Work in process 241 213
Raw materials and supplies 549 470
Total inventories 1,834 1,797
Less: LIFO Reserve 302 288
Total inventories $ 1,532 $ 1,509
Inventories valued on the LIFO method 55.00% 60.00%