v3.26.1
ASSETS IMPAIRMENTS AND RESTRUCTURING (Details) - USD ($)
$ in Millions
 3 Months Ended 12 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Dec. 31, 2025
Restructuring Cost and Reserve [Line Items]      
Severance Costs $ 6 $ 1  
Business Exit Costs 3 8  
Restructuring, Settlement and Impairment Provisions 9 9  
Restructuring Charge [Roll Forward]      
Balance at Beginning of Period 34 26 $ 26
Provision / Adjustments 9   96
Restructuring Reserve, Accrual Adjustment 0   (39)
Cash Reductions (13)   (49)
Balance at End of Period 30   34
Corporate, Non-Segment [Member]      
Restructuring Cost and Reserve [Line Items]      
Restructuring, Settlement and Impairment Provisions (9) (9)  
Facility Closing [Member]      
Restructuring Charge [Roll Forward]      
Balance at Beginning of Period 8 3 3
Provision / Adjustments 3   24
Restructuring Reserve, Accrual Adjustment 0   (6)
Cash Reductions (5)   (13)
Balance at End of Period 6   8
Employee Severance [Member]      
Restructuring Charge [Roll Forward]      
Balance at Beginning of Period 26 23 23
Provision / Adjustments 6   39
Restructuring Reserve, Accrual Adjustment 0   0
Cash Reductions (8)   (36)
Balance at End of Period 24   26
Non-Cash Charges [Member]      
Restructuring Charge [Roll Forward]      
Balance at Beginning of Period 0 0 0
Provision / Adjustments     33
Restructuring Reserve, Accrual Adjustment     33
Cash Reductions     0
Balance at End of Period     $ 0
growth and profitability improvement initiatives | Corporate, Non-Segment [Member]      
Restructuring Charge [Roll Forward]      
Other Restructuring Costs   5  
closure of a heat-transfer fluids production line | Additives And Functional Products [Member]      
Restructuring Cost and Reserve [Line Items]      
Severance Costs   1  
Business Exit Costs   $ 3  
closure of a performance films production line in Germany | Advanced Materials [Member]      
Restructuring Cost and Reserve [Line Items]      
Severance Costs 3    
Business Exit Costs 3    
Restructuring Charge [Roll Forward]      
Inventory Write-down 3    
Corporate Cost Actions | Corporate, Non-Segment [Member]      
Restructuring Cost and Reserve [Line Items]      
Severance Costs $ 3