Investments in associates and joint ventures (Details 4) - BRL (R$) R$ in Thousands |
Dec. 31, 2025 |
Dec. 31, 2024 |
|---|---|---|
| Notes and other explanatory information [abstract] | ||
| Balance at the beginning of the fiscal year | R$ 975,731 | R$ 878,944 |
| Change in corporate participation | ||
| Addition/(disposal) | 186 | |
| Capital decreases/reduction | ||
| Equity method results | 135,501 | 91,947 |
| Dividends | (279,091) | (81,467) |
| Adjustment to fair value | 34,854 | 86,121 |
| Balance at the end of the fiscal year | 866,995 | 975,731 |
| Significant Influence of Banco Santander | ||
| Balance at beginning of year | 2,664,444 | 730,836 |
| Change in corporate participation | 70,388 | |
| Equity method results | 322,812 | 221,039 |
| Dividends | (347,427) | (297,832) |
| Addition/(disposal) (1) | 7,500 | 2,011,369 |
| Capital decreases/reduction | 28 | (2,364) |
| (-) Amortization | (94,543) | |
| Adjustment to fair value | (1,142) | 1,396 |
| Balance at the end of the fiscal year | R$ 2,650,098 | R$ 2,664,444 |