Tax assets and liabilities (Details 3) - BRL (R$) R$ in Thousands |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
|
| Notes and other explanatory information [abstract] | |||
| Tax credits recognized in equity | R$ 315,477,464 | R$ 339,389,357 | R$ 139,356,609 |
| Measurement of securities at fair value through other comprehensive income | 308,792,800 | 333,401,042 | 136,550,936 |
| Measurement of cash flow hedge | 3,032,990 | 2,607,676 | 223,487 |
| Measurement of investment hedge | 1,421,361 | 562,353 | 562,353 |
| Measurement of defined benefit plan | 2,230,313 | 2,818,286 | 2,019,833 |
| Tax expenses recognized in equity | (320,585,520) | (346,808,871) | (140,799,732) |
| Measurement of securities at fair value through other comprehensive income | (309,559,753) | (335,837,710) | (133,417,362) |
| Measurement of cash flow hedge | (3,361,605) | (2,628,353) | (430,444) |
| Measurement of investment hedge | (1,421,361) | (1,421,361) | (1,421,361) |
| Measurement of defined benefit plan | (6,242,801) | (6,921,447) | (5,530,565) |
| Total | R$ (5,108,056) | R$ (7,419,514) | R$ (1,443,123) |