v3.25.4
Financial instruments - Sensitivity analysis – foreign exchange rate exposure – derivative financial instruments (Details) - Currency risk [member] - BRL (R$)
R$ in Thousands
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2023
Possible 25%    
Disclosure of detailed information about financial instruments [line items]    
Closing Foreign Exchange Rate, Percentage of increase (decrease) 25.00%  
Possible 25% | U.S. Dollar to Brazilian Real | Derivative options    
Disclosure of detailed information about financial instruments [line items]    
Derivative financial assets R$ (5,707,051)  
Possible 25% | U.S. Dollar to Brazilian Real | Derivative swaps    
Disclosure of detailed information about financial instruments [line items]    
Derivative financial assets (3,164,776)  
Possible 25% | U.S. Dollar to Brazilian Real | Derivative Non-Deliverable Forward (‘NDF’) Contracts    
Disclosure of detailed information about financial instruments [line items]    
Derivative financial assets (121,626)  
Possible 25% | U.S. Dollar to Brazilian Real | Embedded derivative    
Disclosure of detailed information about financial instruments [line items]    
Derivative financial assets (177,738)  
Possible 25% | U.S. Dollar to Brazilian Real | Commodity Derivatives    
Disclosure of detailed information about financial instruments [line items]    
Derivative financial assets R$ (9,503)  
Remote 50%    
Disclosure of detailed information about financial instruments [line items]    
Closing Foreign Exchange Rate, Percentage of increase (decrease) 50.00%  
Remote 50% | U.S. Dollar to Brazilian Real | Derivative options    
Disclosure of detailed information about financial instruments [line items]    
Derivative financial assets R$ (13,025,130)  
Remote 50% | U.S. Dollar to Brazilian Real | Derivative swaps    
Disclosure of detailed information about financial instruments [line items]    
Derivative financial assets (6,396,550)  
Remote 50% | U.S. Dollar to Brazilian Real | Derivative Non-Deliverable Forward (‘NDF’) Contracts    
Disclosure of detailed information about financial instruments [line items]    
Derivative financial assets (243,252)  
Remote 50% | U.S. Dollar to Brazilian Real | Embedded derivative    
Disclosure of detailed information about financial instruments [line items]    
Derivative financial assets (355,477)  
Remote 50% | U.S. Dollar to Brazilian Real | Commodity Derivatives    
Disclosure of detailed information about financial instruments [line items]    
Derivative financial assets (18,280)  
Probable (base value) | U.S. Dollar to Brazilian Real | Derivative options    
Disclosure of detailed information about financial instruments [line items]    
Derivative financial assets 979,705  
Probable (base value) | U.S. Dollar to Brazilian Real | Derivative swaps    
Disclosure of detailed information about financial instruments [line items]    
Derivative financial assets (851,428)  
Probable (base value) | U.S. Dollar to Brazilian Real | Derivative Non-Deliverable Forward (‘NDF’) Contracts    
Disclosure of detailed information about financial instruments [line items]    
Derivative financial assets 24,355  
Probable (base value) | U.S. Dollar to Brazilian Real | Embedded derivative    
Disclosure of detailed information about financial instruments [line items]    
Derivative financial assets 112,058  
Probable (base value) | U.S. Dollar to Brazilian Real | Commodity Derivatives    
Disclosure of detailed information about financial instruments [line items]    
Derivative financial assets R$ (34,379)  
Selling transactions in the futures markets    
Disclosure of detailed information about financial instruments [line items]    
Value at Risk Time Horizon 24 years 24 years