v3.26.1
Financial instruments and risk management - Sensitivity analysis – exposure to interest rates – except for derivative financial instruments (Details) - Interest rate risk - BRL (R$)
R$ in Thousands
Jun. 30, 2026
Dec. 31, 2025
Possible 25% | Cash and cash equivalents | CDI/SELIC    
Disclosure of detailed information about financial instruments [line items]    
Financial assets R$ (78,973)  
Possible 25% | Marketable securities | CDI/SELIC    
Disclosure of detailed information about financial instruments [line items]    
Financial assets (269,355)  
Possible 25% | Loans and financing | CDI/SELIC    
Disclosure of detailed information about financial instruments [line items]    
Financial liabilities (307,765)  
Possible 25% | Loans and financing | BNDES – TJLP    
Disclosure of detailed information about financial instruments [line items]    
Financial liabilities (1,310)  
Possible 25% | Loans and financing | SOFR    
Disclosure of detailed information about financial instruments [line items]    
Financial liabilities (207,969)  
Remote 50% | Cash and cash equivalents | CDI/SELIC    
Disclosure of detailed information about financial instruments [line items]    
Financial assets (157,946)  
Remote 50% | Marketable securities | CDI/SELIC    
Disclosure of detailed information about financial instruments [line items]    
Financial assets (538,710)  
Remote 50% | Loans and financing | CDI/SELIC    
Disclosure of detailed information about financial instruments [line items]    
Financial liabilities (615,530)  
Remote 50% | Loans and financing | BNDES – TJLP    
Disclosure of detailed information about financial instruments [line items]    
Financial liabilities (2,620)  
Remote 50% | Loans and financing | SOFR    
Disclosure of detailed information about financial instruments [line items]    
Financial liabilities (415,939)  
Probable (base value) | Cash and cash equivalents | CDI/SELIC    
Disclosure of detailed information about financial instruments [line items]    
Financial assets 2,232,448 R$ 3,204,403
Probable (base value) | Marketable securities | CDI/SELIC    
Disclosure of detailed information about financial instruments [line items]    
Financial assets 7,614,276 7,917,258
Probable (base value) | Loans and financing | CDI/SELIC    
Disclosure of detailed information about financial instruments [line items]    
Financial liabilities 8,700,076 8,825,045
Probable (base value) | Loans and financing | BNDES – TJLP    
Disclosure of detailed information about financial instruments [line items]    
Financial liabilities 57,391 101,302
Probable (base value) | Loans and financing | SOFR    
Disclosure of detailed information about financial instruments [line items]    
Financial liabilities R$ 22,605,366 R$ 25,195,489