Risk and Capital Management - Schedule of Composition of Capital Adequacy (Details) - BRL (R$) R$ in Millions |
12 Months Ended | |
|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
|
| Risk And Capital Management [Abstract] | ||
| Common Equity Tier 1 (CET 1) | R$ 185,595 | R$ 188,265 |
| Tier 1 | 208,161 | 206,196 |
| Total capital (PR) | 228,589 | 227,602 |
| Risk-weighted assets (amounts) | R$ 1,505,475 | R$ 1,379,056 |
| Common Equity Tier 1 ratio (%) | 12.30% | 13.70% |
| Tier 1 ratio (%) | 13.80% | 15.00% |
| Total capital ratio (%) | 15.20% | 16.50% |
| Capital conservation buffer requirement (%) | 2.50% | 2.50% |
| Countercyclical buffer requirement (%) | 0.10% | 0.10% |
| Bank G-SIB and/or D-SIB additional requirements (%) | 1.00% | 1.00% |
| Total of bank CET1 specific buffer requirements (%) | 3.60% | 3.60% |