v3.26.1
Restructuring, Asset-Related, and Other Charges - Schedule of Restructuring Program (Details) - USD ($)
$ in Millions
 1 Months Ended 3 Months Ended 6 Months Ended 270 Months Ended
Jan. 31, 2025
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Restructuring Cost and Reserve [Line Items]            
Employee separation charges   $ 0   $ 9 $ 14  
Decommissioning and other charges   3 $ 6 6 13  
Total restructuring and other charges   3 6 15 27  
Asset-related charges   0 12 1 24  
Total restructuring, asset-related, and other charges   3 18 16 51  
SPS CapstoneTM Exit [Member]            
Restructuring Cost and Reserve [Line Items]            
Employee separation charges     1   15  
Decommissioning and other charges $ 6 2 4 5 6  
Asset-related charges   0 12 1 24  
Total restructuring, asset-related, and other charges   2     6  
2024 Restructuring Program [Member]            
Restructuring Cost and Reserve [Line Items]            
Employee separation charges     (1)   (1) $ 19
Decommissioning and other charges     1   2 5
Asset-related charges           $ 27
2026 Restructuring Program [Member]            
Restructuring Cost and Reserve [Line Items]            
Employee separation charges   0   9    
Titanium Technologies Transformation Plan [Member]            
Restructuring Cost and Reserve [Line Items]            
Decommissioning and other charges   1 1 1 5  
Titanium Technologies Transformation Plan [Member] | Titanium Technologies [Member]            
Restructuring Cost and Reserve [Line Items]            
Decommissioning and other charges       1    
Operating Segments [Member] | Thermal & Specialized Solutions [Member]            
Restructuring Cost and Reserve [Line Items]            
Employee separation charges   0   1    
Total restructuring and other charges   0   1    
Total restructuring, asset-related, and other charges   0   1    
Operating Segments [Member] | Titanium Technologies [Member]            
Restructuring Cost and Reserve [Line Items]            
Employee separation charges   0   5    
Decommissioning and other charges   1 1 1 5  
Total restructuring and other charges   1 1 6 5  
Total restructuring, asset-related, and other charges   1 1 6 5  
Operating Segments [Member] | Advanced Performance Materials [Member]            
Restructuring Cost and Reserve [Line Items]            
Employee separation charges   0   1 14  
Decommissioning and other charges   2 5 5 8  
Total restructuring and other charges   2 5 6 22  
Asset-related charges   0 12 1 24  
Total restructuring, asset-related, and other charges   2 17 7 46  
Operating Segments [Member] | SPS CapstoneTM Exit [Member] | Advanced Performance Materials [Member]            
Restructuring Cost and Reserve [Line Items]            
Employee separation charges     1   15  
Decommissioning and other charges   2 4 5 6  
Asset-related charges   0 12 1 24  
Operating Segments [Member] | 2024 Restructuring Program [Member] | Advanced Performance Materials [Member]            
Restructuring Cost and Reserve [Line Items]            
Employee separation charges     (1)   (1)  
Decommissioning and other charges     1   2  
Operating Segments [Member] | 2026 Restructuring Program [Member] | Thermal & Specialized Solutions [Member]            
Restructuring Cost and Reserve [Line Items]            
Employee separation charges   0   1    
Operating Segments [Member] | 2026 Restructuring Program [Member] | Titanium Technologies [Member]            
Restructuring Cost and Reserve [Line Items]            
Employee separation charges   0   5    
Operating Segments [Member] | 2026 Restructuring Program [Member] | Advanced Performance Materials [Member]            
Restructuring Cost and Reserve [Line Items]            
Employee separation charges   0   1    
Operating Segments [Member] | Titanium Technologies Transformation Plan [Member] | Titanium Technologies [Member]            
Restructuring Cost and Reserve [Line Items]            
Decommissioning and other charges   1 $ 1   $ 5  
Corporate [Member]            
Restructuring Cost and Reserve [Line Items]            
Employee separation charges   0   2    
Total restructuring and other charges   0   2    
Total restructuring, asset-related, and other charges   0   2    
Corporate [Member] | 2026 Restructuring Program [Member]            
Restructuring Cost and Reserve [Line Items]            
Employee separation charges   $ 0   $ 2