v3.26.1
Note 11 - Revenue Recognition - Disaggregation of Revenue (Details) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Revenues $ 1,420 [1] $ 1,410
Diversified [Member]    
Revenues 1,151 1,169
Specialty [Member]    
Revenues 265 238
Product and Service, Other [Member]    
Revenues 14 11
Operating Segments [Member]    
Revenues [2] 1,430 1,418
Operating Segments [Member] | Polyurethanes [Member]    
Revenues [2] 923 [1] 912
Operating Segments [Member] | Polyurethanes [Member] | Diversified [Member]    
Revenues 923 912
Operating Segments [Member] | Performance Products [Member]    
Revenues [2] 228 [1] 257
Operating Segments [Member] | Performance Products [Member] | Diversified [Member]    
Revenues 228 257
Operating Segments [Member] | Advanced Materials [Member]    
Revenues [2] 279 [1] 249
Operating Segments [Member] | Advanced Materials [Member] | Specialty [Member]    
Revenues 265 238
Operating Segments [Member] | Advanced Materials [Member] | Product and Service, Other [Member]    
Revenues 14 11
Corporate and Reconciling Items [Member]    
Revenues (10) [1] (8)
U.S. and Canada [Member]    
Revenues [1] 541 543
U.S. and Canada [Member] | Operating Segments [Member] | Polyurethanes [Member]    
Revenues [1] 363 356
U.S. and Canada [Member] | Operating Segments [Member] | Performance Products [Member]    
Revenues [1] 113 118
U.S. and Canada [Member] | Operating Segments [Member] | Advanced Materials [Member]    
Revenues [1] 73 72
U.S. and Canada [Member] | Corporate and Reconciling Items [Member]    
Revenues [1] (8) (3)
Europe [Member]    
Revenues [1] 387 351
Europe [Member] | Operating Segments [Member] | Polyurethanes [Member]    
Revenues [1] 230 215
Europe [Member] | Operating Segments [Member] | Performance Products [Member]    
Revenues [1] 45 48
Europe [Member] | Operating Segments [Member] | Advanced Materials [Member]    
Revenues [1] 113 92
Europe [Member] | Corporate and Reconciling Items [Member]    
Revenues [1] (1) (4)
Asia Pacific [Member]    
Revenues [1] 389 405
Asia Pacific [Member] | Operating Segments [Member] | Polyurethanes [Member]    
Revenues [1] 267 270
Asia Pacific [Member] | Operating Segments [Member] | Performance Products [Member]    
Revenues [1] 52 70
Asia Pacific [Member] | Operating Segments [Member] | Advanced Materials [Member]    
Revenues [1] 71 66
Asia Pacific [Member] | Corporate and Reconciling Items [Member]    
Revenues [1] (1) (1)
Rest of World [Member]    
Revenues [1] 103 111
Rest of World [Member] | Operating Segments [Member] | Polyurethanes [Member]    
Revenues [1] 63 71
Rest of World [Member] | Operating Segments [Member] | Performance Products [Member]    
Revenues [1] 18 21
Rest of World [Member] | Operating Segments [Member] | Advanced Materials [Member]    
Revenues [1] 22 19
Rest of World [Member] | Corporate and Reconciling Items [Member]    
Revenues [1] $ 0 $ 0
[1] Geographic information for revenues is based upon countries into which product is sold.
[2] A reconciliation of total reportable segments’ revenues to total consolidated revenues is provided in “Note 11. Revenue Recognition.”