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RESTRUCTURING AND ASSET RELATED CHARGES - NET DowDuPont Agriculture Division Restructuring Program (Details) - USD ($)
$ in Millions
3 Months Ended 4 Months Ended
Mar. 31, 2019
Mar. 31, 2018
Mar. 31, 2019
Dec. 31, 2018
Nov. 30, 2018
Restructuring Cost and Reserve [Line Items]          
Restructuring, asset related charges and adjustments (benefit) $ 287 $ 262      
DowDuPont Agricultural Division Restructuring Program          
Restructuring Cost and Reserve [Line Items]          
Restructuring and Related Cost, Expected Cost         $ 96
Restructuring, asset related charges and adjustments (benefit) (1)   $ 83    
Charges Against Reserve (3)        
Payments for Restructuring (15)        
Restructuring Reserve 58   58 $ 77  
DowDuPont Agricultural Division Restructuring Program | Accrued And Other Current Liabilities [Member]          
Restructuring Cost and Reserve [Line Items]          
Restructuring Reserve       77  
DowDuPont Agricultural Division Restructuring Program | Severance and Related Benefit Costs          
Restructuring Cost and Reserve [Line Items]          
Restructuring and Related Cost, Expected Cost         83
Restructuring, asset related charges and adjustments (benefit) (4)   74    
Charges Against Reserve 0        
Payments for Restructuring (15)        
Restructuring Reserve 58   58 77  
DowDuPont Agricultural Division Restructuring Program | Severance and Related Benefit Costs | Corporate          
Restructuring Cost and Reserve [Line Items]          
Restructuring, asset related charges and adjustments (benefit) (4)        
DowDuPont Agricultural Division Restructuring Program | Asset Write-downs and Write-offs          
Restructuring Cost and Reserve [Line Items]          
Restructuring and Related Cost, Expected Cost         11
Restructuring, asset related charges and adjustments (benefit) 3   9    
Charges Against Reserve (3)        
Payments for Restructuring 0        
Restructuring Reserve 0   $ 0 $ 0  
DowDuPont Agricultural Division Restructuring Program | Asset Write-downs and Write-offs | Agriculture          
Restructuring Cost and Reserve [Line Items]          
Restructuring, asset related charges and adjustments (benefit) $ 3        
DowDuPont Agricultural Division Restructuring Program | Costs Associated With Exit Or Disposal Activities          
Restructuring Cost and Reserve [Line Items]          
Restructuring and Related Cost, Expected Cost         $ 2