v3.26.1
Securities sold under repurchase agreements and interbank and institutional market funds - Schedule of Financial Assets and Liabilities (Details) - BRL (R$)
R$ in Millions
Dec. 31, 2025
Dec. 31, 2024
Disclosure of offsetting of financial assets [line items]    
Securities sold under repurchase agreements R$ 434,607 R$ 388,787
Current 363,308 345,633
Non-current 71,299 43,154
Assets pledged as collateral    
Disclosure of offsetting of financial assets [line items]    
Securities sold under repurchase agreements 191,655 168,872
Assets pledged as collateral | Government securities    
Disclosure of offsetting of financial assets [line items]    
Securities sold under repurchase agreements 102,108 126,565
Assets pledged as collateral | Corporate securities    
Disclosure of offsetting of financial assets [line items]    
Securities sold under repurchase agreements 56,586 41,275
Assets pledged as collateral | Own issue    
Disclosure of offsetting of financial assets [line items]    
Securities sold under repurchase agreements 2 2
Assets pledged as collateral | Foreign securities    
Disclosure of offsetting of financial assets [line items]    
Securities sold under repurchase agreements 32,959 1,030
Assets received as collateral    
Disclosure of offsetting of financial assets [line items]    
Securities sold under repurchase agreements 164,447 118,867
Right to sell or repledge the collateral    
Disclosure of offsetting of financial assets [line items]    
Securities sold under repurchase agreements R$ 78,505 R$ 101,048