| Revenue from Contract with Customer [Text Block] | 
    10. REVENUE RECOGNITION  
     
   The following tables disaggregate our revenue from continuing operations by major source for the three months ended  June 30, 2023 and 2022 (dollars in millions): 
     
    
     
      
       |   | 
         | 
         | 
         | 
         | 
         | 
         Performance   | 
         | 
         | 
         Advanced   | 
         | 
         | 
         Corporate and   | 
         | 
         | 
         | 
         | 
         | 
       
      
       |   2023   | 
         | 
         Polyurethanes   | 
         | 
         | 
         Products   | 
         | 
         | 
         Materials   | 
         | 
         | 
         eliminations   | 
         | 
         | 
         Total   | 
         | 
       
      
       |   Primary geographic markets(1)   | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
       
      
       |   U.S. and Canada   | 
         | 
       $ | 
       388 | 
         | 
         | 
       $ | 
       140 | 
         | 
         | 
       $ | 
       83 | 
         | 
         | 
       $ | 
       (2 | 
       ) | 
         | 
       $ | 
       609 | 
         | 
       
      
       |   Europe   | 
         | 
         | 
       278 | 
         | 
         | 
         | 
       68 | 
         | 
         | 
         | 
       110 | 
         | 
         | 
         | 
       (5 | 
       ) | 
         | 
         | 
       451 | 
         | 
       
      
       |   Asia Pacific   | 
         | 
         | 
       260 | 
         | 
         | 
         | 
       74 | 
         | 
         | 
         | 
       69 | 
         | 
         | 
         | 
       — | 
         | 
         | 
         | 
       403 | 
         | 
       
      
       |   Rest of world   | 
         | 
         | 
       86 | 
         | 
         | 
         | 
       25 | 
         | 
         | 
         | 
       22 | 
         | 
         | 
         | 
       — | 
         | 
         | 
         | 
       133 | 
         | 
       
      
       |   | 
         | 
       $ | 
       1,012 | 
         | 
         | 
       $ | 
       307 | 
         | 
         | 
       $ | 
       284 | 
         | 
         | 
       $ | 
       (7 | 
       ) | 
         | 
       $ | 
       1,596 | 
         | 
       
      
       |   | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
       
      
       |   Major product groupings   | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
       
      
       |   MDI urethanes   | 
         | 
       $ | 
       1,012 | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
       $ | 
       1,012 | 
         | 
       
      
       |   Differentiated   | 
         | 
         | 
         | 
         | 
         | 
       $ | 
       307 | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
       307 | 
         | 
       
      
       |   Specialty   | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
       $ | 
       267 | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
       267 | 
         | 
       
      
       |   Other   | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
       17 | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
       17 | 
         | 
       
      
       |   Eliminations   | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
       $ | 
       (7 | 
       ) | 
         | 
         | 
       (7 | 
       ) | 
       
      
       |   | 
         | 
       $ | 
       1,012 | 
         | 
         | 
       $ | 
       307 | 
         | 
         | 
       $ | 
       284 | 
         | 
         | 
       $ | 
       (7 | 
       ) | 
         | 
       $ | 
       1,596 | 
         | 
       
     
     
     
    
     
      
       |   | 
         | 
         | 
         | 
         | 
         | 
         Performance   | 
         | 
         | 
         Advanced   | 
         | 
         | 
         Corporate and   | 
         | 
         | 
         | 
         | 
         | 
       
      
       |   2022   | 
         | 
         Polyurethanes   | 
         | 
         | 
         Products   | 
         | 
         | 
         Materials   | 
         | 
         | 
         eliminations   | 
         | 
         | 
         Total   | 
         | 
       
      
       |   Primary geographic markets(1)   | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
       
      
       |   U.S. and Canada   | 
         | 
       $ | 
       571 | 
         | 
         | 
       $ | 
       223 | 
         | 
         | 
       $ | 
       110 | 
         | 
         | 
       $ | 
       (4 | 
       ) | 
         | 
       $ | 
       900 | 
         | 
       
      
       |   Europe   | 
         | 
         | 
       348 | 
         | 
         | 
         | 
       117 | 
         | 
         | 
         | 
       123 | 
         | 
         | 
         | 
       (4 | 
       ) | 
         | 
         | 
       584 | 
         | 
       
      
       |   Asia Pacific   | 
         | 
         | 
       332 | 
         | 
         | 
         | 
       120 | 
         | 
         | 
         | 
       74 | 
         | 
         | 
         | 
       (2 | 
       ) | 
         | 
         | 
       524 | 
         | 
       
      
       |   Rest of world   | 
         | 
         | 
       102 | 
         | 
         | 
         | 
       32 | 
         | 
         | 
         | 
       29 | 
         | 
         | 
         | 
       (1 | 
       ) | 
         | 
         | 
       162 | 
         | 
       
      
       |   | 
         | 
       $ | 
       1,353 | 
         | 
         | 
       $ | 
       492 | 
         | 
         | 
       $ | 
       336 | 
         | 
         | 
       $ | 
       (11 | 
       ) | 
         | 
       $ | 
       2,170 | 
         | 
       
      
       |   | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
       
      
       |   Major product groupings   | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
       
      
       |   MDI urethanes   | 
         | 
       $ | 
       1,353 | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
       $ | 
       1,353 | 
         | 
       
      
       |   Differentiated   | 
         | 
         | 
         | 
         | 
         | 
       $ | 
       492 | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
       492 | 
         | 
       
      
       |   Specialty   | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
       $ | 
       309 | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
       309 | 
         | 
       
      
       |   Other   | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
       27 | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
       27 | 
         | 
       
      
       |   Eliminations   | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
       $ | 
       (11 | 
       ) | 
         | 
         | 
       (11 | 
       ) | 
       
      
       |   | 
         | 
       $ | 
       1,353 | 
         | 
         | 
       $ | 
       492 | 
         | 
         | 
       $ | 
       336 | 
         | 
         | 
       $ | 
       (11 | 
       ) | 
         | 
       $ | 
       2,170 | 
         | 
       
     
     
     
    
   
    
     
      |   (1)   | 
        Geographic information for revenues is based upon countries into which product is sold.   | 
      
    
    
    
   The following tables disaggregate our revenue from continuing operations by major source for the six months ended  June 30, 2023 and 2022 (dollars in millions): 
     
    
     
      
       |   | 
         | 
         | 
         | 
         | 
         | 
         Performance   | 
         | 
         | 
         Advanced   | 
         | 
         | 
         Corporate and   | 
         | 
         | 
         | 
         | 
         | 
       
      
       |   2023   | 
         | 
         Polyurethanes   | 
         | 
         | 
         Products   | 
         | 
         | 
         Materials   | 
         | 
         | 
         eliminations   | 
         | 
         | 
         Total   | 
         | 
       
      
       |   Primary geographic markets(1)   | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
       
      
       |   U.S. and Canada   | 
         | 
       $ | 
       774 | 
         | 
         | 
       $ | 
       297 | 
         | 
         | 
       $ | 
       172 | 
         | 
         | 
       $ | 
       (5 | 
       ) | 
         | 
       $ | 
       1,238 | 
         | 
       
      
       |   Europe   | 
         | 
         | 
       550 | 
         | 
         | 
         | 
       142 | 
         | 
         | 
         | 
       226 | 
         | 
         | 
         | 
       (9 | 
       ) | 
         | 
         | 
       909 | 
         | 
       
      
       |   Asia Pacific   | 
         | 
         | 
       518 | 
         | 
         | 
         | 
       153 | 
         | 
         | 
         | 
       131 | 
         | 
         | 
         | 
       (1 | 
       ) | 
         | 
         | 
       801 | 
         | 
       
      
       |   Rest of world   | 
         | 
         | 
       161 | 
         | 
         | 
         | 
       49 | 
         | 
         | 
         | 
       44 | 
         | 
         | 
         | 
       — | 
         | 
         | 
         | 
       254 | 
         | 
       
      
       |   | 
         | 
       $ | 
       2,003 | 
         | 
         | 
       $ | 
       641 | 
         | 
         | 
       $ | 
       573 | 
         | 
         | 
       $ | 
       (15 | 
       ) | 
         | 
       $ | 
       3,202 | 
         | 
       
      
       |   | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
       
      
       |   Major product groupings   | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
       
      
       |   MDI urethanes   | 
         | 
       $ | 
       2,003 | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
       $ | 
       2,003 | 
         | 
       
      
       |   Differentiated   | 
         | 
         | 
         | 
         | 
         | 
       $ | 
       641 | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
       641 | 
         | 
       
      
       |   Specialty   | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
       $ | 
       535 | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
       535 | 
         | 
       
      
       |   Other   | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
       38 | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
       38 | 
         | 
       
      
       |   Eliminations   | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
       $ | 
       (15 | 
       ) | 
         | 
         | 
       (15 | 
       ) | 
       
      
       |   | 
         | 
       $ | 
       2,003 | 
         | 
         | 
       $ | 
       641 | 
         | 
         | 
       $ | 
       573 | 
         | 
         | 
       $ | 
       (15 | 
       ) | 
         | 
       $ | 
       3,202 | 
         | 
       
     
     
     
    
     
      
       |   | 
         | 
         | 
         | 
         | 
         | 
         Performance   | 
         | 
         | 
         Advanced   | 
         | 
         | 
         Corporate and   | 
         | 
         | 
         | 
         | 
         | 
       
      
       |   2022   | 
         | 
         Polyurethanes   | 
         | 
         | 
         Products   | 
         | 
         | 
         Materials   | 
         | 
         | 
         eliminations   | 
         | 
         | 
         Total   | 
         | 
       
      
       |   Primary geographic markets(1)   | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
       
      
       |   U.S. and Canada   | 
         | 
       $ | 
       1,131 | 
         | 
         | 
       $ | 
       428 | 
         | 
         | 
       $ | 
       216 | 
         | 
         | 
       $ | 
       (7 | 
       ) | 
         | 
       $ | 
       1,768 | 
         | 
       
      
       |   Europe   | 
         | 
         | 
       703 | 
         | 
         | 
         | 
       237 | 
         | 
         | 
         | 
       251 | 
         | 
         | 
         | 
       (8 | 
       ) | 
         | 
         | 
       1,183 | 
         | 
       
      
       |   Asia Pacific   | 
         | 
         | 
       692 | 
         | 
         | 
         | 
       244 | 
         | 
         | 
         | 
       145 | 
         | 
         | 
         | 
       (3 | 
       ) | 
         | 
         | 
       1,078 | 
         | 
       
      
       |   Rest of world   | 
         | 
         | 
       213 | 
         | 
         | 
         | 
       63 | 
         | 
         | 
         | 
       59 | 
         | 
         | 
         | 
       (2 | 
       ) | 
         | 
         | 
       333 | 
         | 
       
      
       |   | 
         | 
       $ | 
       2,739 | 
         | 
         | 
       $ | 
       972 | 
         | 
         | 
       $ | 
       671 | 
         | 
         | 
       $ | 
       (20 | 
       ) | 
         | 
       $ | 
       4,362 | 
         | 
       
      
       |   | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
       
      
       |   Major product groupings   | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
       
      
       |   MDI urethanes   | 
         | 
       $ | 
       2,739 | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
       $ | 
       2,739 | 
         | 
       
      
       |   Differentiated   | 
         | 
         | 
         | 
         | 
         | 
       $ | 
       972 | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
       972 | 
         | 
       
      
       |   Specialty   | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
       $ | 
       615 | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
       615 | 
         | 
       
      
       |   Other   | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
       56 | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
       56 | 
         | 
       
      
       |   Eliminations   | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
       $ | 
       (20 | 
       ) | 
         | 
         | 
       (20 | 
       ) | 
       
      
       |   | 
         | 
       $ | 
       2,739 | 
         | 
         | 
       $ | 
       972 | 
         | 
         | 
       $ | 
       671 | 
         | 
         | 
       $ | 
       (20 | 
       ) | 
         | 
       $ | 
       4,362 | 
         | 
       
     
     
     
    
   
    
     
      |   (1)   | 
        Geographic information for revenues is based upon countries into which product is sold.   | 
      
    
    
     
  
 |