Derivative financial instruments (Details 9) - BRL (R$) R$ in Thousands |
Dec. 31, 2025 |
Dec. 31, 2024 |
|---|---|---|
| Derivative Financial Instruments | ||
| Financial Treasury Bills - LFT | R$ 18,735,636 | R$ 23,592,560 |
| National Treasury Bills - LTN | 15,971,113 | 6,891,750 |
| National Treasury Notes - NTN | 7,063,913 | 4,775,236 |
| Total | R$ 41,770,662 | R$ 35,259,546 |