Accounting policies and determination criteria (Details) - Derivatives [member] - BRL (R$) R$ in Thousands |
Dec. 31, 2025 |
Dec. 31, 2024 |
|---|---|---|
| IfrsStatementLineItems [Line Items] | ||
| Gross financial assets subject to offsetting, enforceable master netting arrangements or similar agreements | R$ 70,667,950 | R$ 42,380,547 |
| Financial assets offset in the balance sheet | (4,860,252) | (2,174,248) |
| Net financial assets subject to offsetting, enforceable master netting arrangements or similar agreements in statement of financial position | 65,807,698 | 40,206,299 |
| Gross financial liabilities subject to offsetting, enforceable master netting arrangements or similar agreements | 64,872,243 | 41,584,522 |
| Financial liabilities offset in the balance sheet | (4,860,252) | (2,174,248) |
| Net financial liabilities subject to offsetting, enforceable master netting arrangements or similar agreements in statement of financial position | R$ 60,011,991 | R$ 39,410,274 |