Stockholders' equity - Schedule of Calculation of Dividends and Interest on Capital (Details) - BRL (R$) R$ in Millions |
12 Months Ended | |
|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
|
| Notes and other explanatory information [abstract] | ||
| Statutory net income | R$ 45,659 | R$ 37,318 |
| Legal reserve | (2,283) | (1,406) |
| Dividend calculation basis | 43,376 | 35,912 |
| Minimum mandatory dividend | 10,844 | 8,978 |
| Dividends and interest on capital paid / accrued / identified | R$ 31,647 | R$ 25,724 |