Derivative financial instruments (Details 5) - BRL (R$) R$ in Thousands |
Dec. 31, 2025 |
Dec. 31, 2024 |
|---|---|---|
| Nominal Value Retained Risk Total Rate Of Return Swap [Member] | ||
| IfrsStatementLineItems [Line Items] | ||
| Credit Derivatives Portfolio Stockholders Equity Credit Swaps | R$ 4,421,208 | |
| Credit Derivatives Portfolio Stockholders Equity Credit Total | 4,421,208 | |
| Nominal Value Transferred Risk Credit Swap [Member] | ||
| IfrsStatementLineItems [Line Items] | ||
| Credit Derivatives Portfolio Stockholders Equity Credit Swaps | 7,950,397 | 16,153,307 |
| Credit Derivatives Portfolio Stockholders Equity Credit Total | R$ 7,950,397 | R$ 16,153,307 |