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ASSETS IMPAIRMENTS AND RESTRUCTURING (Details) - USD ($)
$ in Millions
 3 Months Ended 12 Months Ended
Mar. 31, 2019
Mar. 31, 2018
Dec. 31, 2018
Restructuring Cost and Reserve [Line Items]      
Severance Costs $ 28 $ 2  
Business Exit Costs 4 0  
Total 32 2  
Restructuring Charge [Roll Forward]      
Balance at Beginning of Period 14 29 $ 29
Provision / Adjustments 32   45
Restructuring Reserve, Accrual Adjustment 1    
Non-cash Reductions     (38)
Cash Reductions (3)   (22)
Balance at End of Period 44   14
Facility Closing [Member]      
Restructuring Charge [Roll Forward]      
Balance at Beginning of Period 8 10 10
Provision / Adjustments 4   0
Restructuring Reserve, Accrual Adjustment 1   0
Cash Reductions (1)   (2)
Balance at End of Period 12   8
Employee Severance [Member]      
Restructuring Charge [Roll Forward]      
Balance at Beginning of Period 6 19 19
Provision / Adjustments 28   6
Restructuring Reserve, Accrual Adjustment 0   1
Cash Reductions (2)   (20)
Balance at End of Period 32   6
Non-Cash Charges [Member]      
Restructuring Charge [Roll Forward]      
Balance at Beginning of Period 0 0 0
Provision / Adjustments     39
Non-cash Reductions     (39)
Cash Reductions     0
Balance at End of Period     $ 0
Corporate, Non-Segment [Member] | Employee Severance [Member]      
Restructuring Cost and Reserve [Line Items]      
Severance Costs   $ 2  
Corporate Cost Actions 2019 [Member] | Corporate, Non-Segment [Member]      
Restructuring Cost and Reserve [Line Items]      
Severance Costs 28    
Capital Project AFP [Member] | Additives And Functional Products [Member]      
Restructuring Cost and Reserve [Line Items]      
Business Exit Costs $ 4