v3.26.1
Risk and Capital Management - Schedule of Internal Rating (Details) - BRL (R$)
R$ in Millions
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Disclosure of financial assets that are either past due or impaired [line items]    
Loan operations and lease operations portfolio R$ 1,083,798 R$ 1,025,493
Loan operations and lease operations percentage 100.00% 100.00%
Low    
Disclosure of financial assets that are either past due or impaired [line items]    
Loan operations and lease operations portfolio R$ 880,593 R$ 886,188
Medium    
Disclosure of financial assets that are either past due or impaired [line items]    
Loan operations and lease operations portfolio 113,939 73,031
High    
Disclosure of financial assets that are either past due or impaired [line items]    
Loan operations and lease operations portfolio 41,429 11,143
Credit-impaired    
Disclosure of financial assets that are either past due or impaired [line items]    
Loan operations and lease operations portfolio 47,837 55,131
Stage 1    
Disclosure of financial assets that are either past due or impaired [line items]    
Loan operations and lease operations portfolio R$ 981,017 R$ 876,653
Loan operations and lease operations percentage 90.50% 85.50%
Stage 1 | Low    
Disclosure of financial assets that are either past due or impaired [line items]    
Loan operations and lease operations portfolio R$ 880,216 R$ 817,782
Stage 1 | Medium    
Disclosure of financial assets that are either past due or impaired [line items]    
Loan operations and lease operations portfolio 99,804 58,817
Stage 1 | High    
Disclosure of financial assets that are either past due or impaired [line items]    
Loan operations and lease operations portfolio 997 54
Stage 1 | Credit-impaired    
Disclosure of financial assets that are either past due or impaired [line items]    
Loan operations and lease operations portfolio 0 0
Stage 2    
Disclosure of financial assets that are either past due or impaired [line items]    
Loan operations and lease operations portfolio R$ 54,944 R$ 93,709
Loan operations and lease operations percentage 5.10% 9.10%
Stage 2 | Low    
Disclosure of financial assets that are either past due or impaired [line items]    
Loan operations and lease operations portfolio R$ 377 R$ 68,406
Stage 2 | Medium    
Disclosure of financial assets that are either past due or impaired [line items]    
Loan operations and lease operations portfolio 14,135 14,214
Stage 2 | High    
Disclosure of financial assets that are either past due or impaired [line items]    
Loan operations and lease operations portfolio 40,432 11,089
Stage 2 | Credit-impaired    
Disclosure of financial assets that are either past due or impaired [line items]    
Loan operations and lease operations portfolio 0 0
Stage 3    
Disclosure of financial assets that are either past due or impaired [line items]    
Loan operations and lease operations portfolio R$ 47,837 R$ 55,131
Loan operations and lease operations percentage 4.40% 5.40%
Stage 3 | Low    
Disclosure of financial assets that are either past due or impaired [line items]    
Loan operations and lease operations portfolio R$ 0 R$ 0
Stage 3 | Medium    
Disclosure of financial assets that are either past due or impaired [line items]    
Loan operations and lease operations portfolio 0 0
Stage 3 | High    
Disclosure of financial assets that are either past due or impaired [line items]    
Loan operations and lease operations portfolio 0 0
Stage 3 | Credit-impaired    
Disclosure of financial assets that are either past due or impaired [line items]    
Loan operations and lease operations portfolio R$ 47,837 R$ 55,131