v3.26.1
COMMITMENTS AND CONTINGENCIES (Details)
€ in Millions, $ in Millions
1 Months Ended 3 Months Ended 12 Months Ended 24 Months Ended
Jul. 29, 2025
defendant
Oct. 11, 2024
USD ($)
Jul. 31, 2024
USD ($)
Jul. 31, 2024
EUR (€)
Apr. 30, 2019
producer
Mar. 31, 2026
USD ($)
Dec. 31, 2025
USD ($)
Dec. 31, 2024
USD ($)
Dec. 31, 2022
USD ($)
Dec. 31, 2020
USD ($)
Dec. 31, 2016
USD ($)
Dec. 31, 2025
USD ($)
Sep. 30, 2023
USD ($)
Dec. 31, 2021
USD ($)
Sep. 30, 2019
USD ($)
Sep. 30, 2019
EUR (€)
Loss Contingencies [Line Items]                                
Liability for asbestos and environmental claims, gross           $ 271 $ 270         $ 270        
Liability for asbestos and environmental claims, net           $ 110 103         103        
Secretariat of the Federal Revenue Bureau of Brazil                                
Loss Contingencies [Line Items]                                
Responsible party percentage           60.00%                    
Loss contingency accrual           $ 48               $ 48    
Income tax examination, estimate of possible loss   $ 269       426                    
Income tax examination, penalties and interest expense           $ 313                    
Responsible party percentage-Sylvamo           40.00%                    
Shared tax assessment payment           $ 300                    
Secretariat of the Federal Revenue Bureau of Brazil | Tax Year 2007-2015                                
Loss Contingencies [Line Items]                                
Income tax examination, estimate of possible loss           113                    
Artuso Pastry Foods Corp v. Packaging Corp. of America (N.D. Ill.)                                
Loss Contingencies [Line Items]                                
Loss contingency, number of defendants | defendant 12                              
Italian Competition Authority                                
Loss Contingencies [Line Items]                                
Loss contingency, number of defendants | producer         30                      
Loss contingency accrual                             $ 31 € 29
Accrual for environmental loss contingencies, period decrease     $ 6 € 6                        
Cass Lake, Minnesota                                
Loss Contingencies [Line Items]                                
Accrual for environmental loss contingencies           48 47         47        
Kalamazoo River Superfund Site                                
Loss Contingencies [Line Items]                                
Loss contingency, damages sought, value                     $ 37          
Environmental remediation reserve adjustments             7 $ 27 $ 27              
Liability for asbestos and environmental claims, net           18 20         20        
Kalamazoo River Superfund Site | Georgia-Pacific Consumer Products LP, Fort James Corporation and Georgia Pacific LLC Cost Recovery Action                                
Loss Contingencies [Line Items]                                
Loss contingency, damages sought, value           79                    
Loss contingency, damages awarded, value           $ 50                    
Loss contingencies, share of damages (as percent)           15.00%                    
San Jacinto River Superfund Site                                
Loss Contingencies [Line Items]                                
Environmental remediation reserve adjustments                   $ 65            
Liability for asbestos and environmental claims, net           $ 97 97         97        
Responsible party percentage                   50.00%            
San Jacinto River Superfund Site | Southern Impoundment                                
Loss Contingencies [Line Items]                                
Environmental remediation reserve adjustments                   $ 10            
San Jacinto River Superfund Site | Northern impoundment                                
Loss Contingencies [Line Items]                                
Environmental remediation reserve adjustments                   $ 55   27        
Versailles Pond                                
Loss Contingencies [Line Items]                                
Liability for asbestos and environmental claims, net           $ 29 $ 29         $ 29 $ 30