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COMMITMENTS AND CONTINGENT LIABILITIES (Guarantees) (Table and Narrative) (Details) - USD ($)
$ in Millions
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Guarantees [Abstract]      
Maximum future payments $ 5,408 $ 5,663  
Recorded liability 155 184  
Long-term debt $ 19,594 $ 20,517  
Sadara Chemical Company      
Guarantees [Abstract]      
Ownership interest 35.00% 35.00% 35.00%
Guarantees      
Guarantees [Abstract]      
Maximum future payments $ 4,523 $ 4,774  
Recorded liability 25 49  
Guarantees | Sadara Chemical Company      
Guarantees [Abstract]      
Maximum future payments 4,200    
Residual value guarantees      
Guarantees [Abstract]      
Maximum future payments 885 889  
Recorded liability 130 135  
Sadara Chemical Company | Total Project Financing      
Guarantees [Abstract]      
Principal amount 12,500    
Long-term debt $ 11,700 $ 12,400