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INVENTORIES (Details) - USD ($)
$ in Millions
Dec. 31, 2018
Dec. 31, 2017
Inventory Combining Work In Process And Raw Materials Alternative Gross Abstract    
Raw materials $ 1,109 $ 1,193
Work in process 811 790
Finished products 2,445 2,669
Inventory, Gross 4,365 4,652
Reduction to LIFO cost basis (39) (39)
Inventories 4,326 4,613
Inventories Paragraph Details [Abstract]    
LIFO inventory amount 294 324
LIFO reserve $ 39 $ 39