Risk and Capital Management - Schedule of Other Financial Assets (Details) - BRL (R$) R$ in Millions |
12 Months Ended | |
|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
|
| Risk And Capital Management [Line Items] | ||
| Other financial assets | R$ 1,512,220 | R$ 1,396,543 |
| Other financial assets percentage | 100.00% | 100.00% |
| Public sector | ||
| Risk And Capital Management [Line Items] | ||
| Other financial assets | R$ 954,882 | R$ 871,579 |
| Other financial assets percentage | 63.10% | 62.40% |
| Services | ||
| Risk And Capital Management [Line Items] | ||
| Other financial assets | R$ 156,891 | R$ 196,419 |
| Other financial assets percentage | 10.40% | 14.10% |
| Financial | ||
| Risk And Capital Management [Line Items] | ||
| Other financial assets | R$ 232,974 | R$ 146,823 |
| Other financial assets percentage | 15.40% | 10.50% |
| Other sectors | ||
| Risk And Capital Management [Line Items] | ||
| Other financial assets | R$ 167,473 | R$ 181,722 |
| Other financial assets percentage | 11.10% | 13.00% |