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COMMITMENTS AND CONTINGENT LIABILITIES (Asbestos-Related Matters of Union Carbide Corporation) (Details) - USD ($)
$ in Millions
3 Months Ended 12 Months Ended
Dec. 31, 2016
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2002
Loss Contingencies [Line Items]          
Asbestos-related charge   $ 0 $ 0 $ 1,113  
Union Carbide Corporation | Asbestos Related Matters          
Loss Contingencies [Line Items]          
Liability for asbestos-related pending and future claims   $ 1,260 $ 1,369    
Percentage of recorded asbestos liability related to pending claims   16.00% 16.00%    
Percentage of recorded asbestos liability related to future claims   84.00% 84.00%    
Union Carbide Corporation | Asbestos Related Matters, Pending and Future Claims          
Loss Contingencies [Line Items]          
Liability for asbestos-related pending and future claims         $ 2,200
Asbestos-related charge $ 104        
Union Carbide Corporation | Asbestos Related Matters, Pending and Future Claims | Minimum          
Loss Contingencies [Line Items]          
Estimate of possible loss 502     502  
Union Carbide Corporation | Asbestos Related Matters, Pending and Future Claims | Maximum          
Loss Contingencies [Line Items]          
Estimate of possible loss 565     565  
Union Carbide Corporation | Asbestos Related Matters, Defense and Processing Costs          
Loss Contingencies [Line Items]          
Asbestos-related charge 1,009        
Union Carbide Corporation | Asbestos Related Matters, Defense and Processing Costs | Minimum          
Loss Contingencies [Line Items]          
Estimate of possible loss 1,009     1,009  
Union Carbide Corporation | Asbestos Related Matters, Defense and Processing Costs | Maximum          
Loss Contingencies [Line Items]          
Estimate of possible loss $ 1,081     $ 1,081