Debt instruments (Details) - BRL (R$) R$ in Thousands |
Dec. 31, 2025 |
Dec. 31, 2024 |
|---|---|---|
| Notes and other explanatory information [abstract] | ||
| Financial Assets Measured at Fair Value Through Profit or Loss | R$ 95,546,026 | R$ 107,585,055 |
| Financial Assets Measured at Fair Value through Other Comprehensive Income | 69,354,220 | 92,058,907 |
| Financial Assets Measured at Amortized Cost (2) | 114,708,615 | 84,529,222 |
| Comprising: | ||
| Debt instruments at Amortized Cost | 117,910,438 | 86,598,778 |
| Provision for impairment losses (note 9.c) | (3,201,823) | (2,069,556) |
| Total | 279,608,861 | 284,173,184 |
| Type: | ||
| Government securities - Brazil (1) | 182,217,619 | 190,643,118 |
| Debentures and promissory notes | 52,868,779 | 70,450,135 |
| Other debt securities | 44,522,463 | 23,079,931 |
| Other | ||
| Total | R$ 279,608,861 | R$ 284,173,184 |