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ASSETS HELD FOR SALE - Narrative (Details) - USD ($)
$ in Millions
1 Months Ended 12 Months Ended
Aug. 31, 2017
Jul. 31, 2017
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Disclosure Of Assets And Liabilities Held For Sale [Line Items]          
Proceeds from sale of assets held for sale     $ 0 $ 15 $ 0
Gain on sale of assets     (267) $ (57) $ (269)
Assets and liabilities classified as held for sale | Industrial operations          
Disclosure Of Assets And Liabilities Held For Sale [Line Items]          
Gain on sale of assets     233    
Assets and liabilities classified as held for sale | Industrial operations | Graphite Electrode Business          
Disclosure Of Assets And Liabilities Held For Sale [Line Items]          
Impairment charge     8    
Proceeds from sale of assets held for sale   $ 28      
Assets and liabilities classified as held for sale | Industrial operations | Infrastructure Support Manufacturing Business          
Disclosure Of Assets And Liabilities Held For Sale [Line Items]          
Proceeds from sale of assets held for sale     27    
Assets and liabilities classified as held for sale | Industrial operations | Bath And Shower Products Manufacturing Business          
Disclosure Of Assets And Liabilities Held For Sale [Line Items]          
Proceeds from sale of assets held for sale     357    
Assets and liabilities classified as held for sale | Energy          
Disclosure Of Assets And Liabilities Held For Sale [Line Items]          
Proceeds from sale of assets held for sale $ 24        
Gain on sale of assets     24    
Assets and liabilities classified as held for sale | Energy | Oil And Natural Gas Business          
Disclosure Of Assets And Liabilities Held For Sale [Line Items]          
Impairment charge     $ (23)