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ASSETS IMPAIRMENTS AND RESTRUCTURING (Details) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2019
Sep. 30, 2018
Sep. 30, 2019
Sep. 30, 2018
Dec. 31, 2018
Restructuring Cost and Reserve [Line Items]          
Severance Costs $ 1 $ 0 $ 45 $ 6  
Business Exit Costs 1 0 7 0  
Total 2 $ 0 52 6  
Restructuring Charge [Roll Forward]          
Balance at Beginning of Period     14 29 $ 29
Provision / Adjustments     52   45
Restructuring Reserve, Accrual Adjustment     1    
Non-cash Reductions         (38)
Cash Reductions     (31)   (22)
Balance at End of Period 36   36   14
Facility Closing [Member]          
Restructuring Charge [Roll Forward]          
Balance at Beginning of Period     8 10 10
Provision / Adjustments     8   0
Restructuring Reserve, Accrual Adjustment     1   0
Cash Reductions     (6)   (2)
Balance at End of Period 11   11   8
Employee Severance [Member]          
Restructuring Charge [Roll Forward]          
Balance at Beginning of Period     6 19 19
Provision / Adjustments     44   6
Restructuring Reserve, Accrual Adjustment     0   1
Cash Reductions     (25)   (20)
Balance at End of Period 25   25   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       $ 6  
Corporate Cost Actions 2019 [Member] | Corporate, Non-Segment [Member]          
Restructuring Cost and Reserve [Line Items]          
Severance Costs $ 2   48    
Capital Project AFP [Member] | Additives And Functional Products [Member]          
Restructuring Cost and Reserve [Line Items]          
Business Exit Costs     $ 4