Debt instruments (Details 1) - BRL (R$) R$ in Thousands |
Dec. 31, 2025 |
Dec. 31, 2024 |
|---|---|---|
| Notes and other explanatory information [abstract] | ||
| Brazilian Real | R$ 271,543,911 | R$ 262,560,537 |
| U.S. Dollar | 8,029,564 | 19,541,153 |
| Other currencies | 35,386 | 2,071,494 |
| Total | R$ 279,608,861 | R$ 284,173,184 |