Annual report [Section 13 and 15(d), not S-K Item 405]

Note 13 - Restructuring, Impairment and Plant Closing Costs (Details Textual)

v3.25.4
Note 13 - Restructuring, Impairment and Plant Closing Costs (Details Textual) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Asset Impairment Charges $ 85    
Goodwill, Impairment Loss 14    
Restructuring Charges (Credits) 48 $ 29 $ 7
Workforce Reduction and Contract Termination [Member] | Performance Products [Member] | European Maleic Anhydride Manufacturing Facility Closure in Moers Germany[Member]      
Restructuring Charges 97    
Asset Impairment Charges 88    
Goodwill, Impairment Loss 14    
Restructuring and Related Cost, Expected Cost $ 2    
Restructuring Charges, Statement of Income or Comprehensive Income [Extensible Enumeration] Restructuring, Settlement and Impairment Provisions (Credits)    
Employee Severance [Member]      
Restructuring Charges (Credits) $ 40 26 (4)
Employee Severance [Member] | Restructuring Programs to Optimize Managed Services and Align and Optimize Processes and Systems [Member]      
Restructuring Charges 51 20  
Restructuring and Related Cost, Expected Cost 6    
Restructuring Charges (Credits) (2) 4 9
Employee Severance [Member] | Corporate Segment and Other Operating Segment [Member] | Restructuring Program to Optimize Leveraging Shared Services Capabilities [Member]      
Restructuring Charges (Credits)     (6)
Employee Severance [Member] | Polyurethanes [Member]      
Restructuring Charges     4
Employee Severance and Accelerated Depreciation [Member] | Advanced Materials [Member] | Restructuring Program to Optimize the Segment’s Manufacturing Processes and Cost Structure [Member]      
Restructuring Charges 1 $ 13  
Restructuring and Related Cost, Expected Cost $ 5    
Site Closure [Member] | Advanced Materials [Member]      
Restructuring Charges (Credits)     $ 4