Quarterly report [Sections 13 or 15(d)]

Note 20 - Operating Segment Information - Segment Reconciliation (Details)

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Note 20 - Operating Segment Information - Segment Reconciliation (Details) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2026
Sep. 30, 2025
Sep. 30, 2026
Sep. 30, 2025
Dec. 31, 2025
Total assets $ 7,104   $ 7,104   $ 7,015
Depreciation and amortization - continuing operations 77 $ 73 227 $ 214  
Capital expenditures     101 116  
Operating Segments [Member]          
Total assets 6,446   6,446   6,325
Depreciation and amortization - continuing operations     219 206  
Capital expenditures     98 114  
Operating Segments [Member] | Polyurethanes [Member]          
Total assets 4,156   4,156   4,045
Depreciation and amortization - continuing operations     130 121  
Capital expenditures     60 52  
Operating Segments [Member] | Performance Products [Member]          
Total assets 1,164   1,164   1,185
Depreciation and amortization - continuing operations     51 47  
Capital expenditures     22 44  
Operating Segments [Member] | Advanced Materials [Member]          
Total assets 1,126   1,126   1,095
Depreciation and amortization - continuing operations     38 38  
Capital expenditures     16 18  
Corporate and Reconciling Items [Member]          
Total assets $ 658   658   $ 690
Depreciation and amortization - continuing operations     8 8  
Capital expenditures     $ 3 $ 2