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INVENTORIES (Details) - USD ($)
$ in Millions
Dec. 31, 2019
Dec. 31, 2018
At FIFO or average cost (approximates current cost) [Abstract]    
Finished goods $ 1,114 $ 1,143
Work in process 220 262
Raw materials and supplies 576 515
Total inventories at FIFO or average cost 1,910 1,920
Less: LIFO reserve 248 337
Total inventories $ 1,662 $ 1,583
Inventories valued on the LIFO method (in hundredths) 50.00% 55.00%