v3.26.1
Loan and lease operations - Schedule of Securitization or Transfer of Financial Assets (Details) - BRL (R$)
R$ in Millions
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Disclosure of fair value measurement of assets [line items]      
Assets R$ 2,880,511 R$ 2,673,301  
Liabilities 2,424,121 2,239,979  
Net income / (loss) 45,849 42,128 R$ 33,877
Restricted Investment With Co-Obligation      
Disclosure of fair value measurement of assets [line items]      
Net income / (loss) (26) (1)  
Restricted Investment With Co-Obligation | Restricted operations on assets      
Disclosure of fair value measurement of assets [line items]      
Net income / (loss) (26) (1)  
Restricted Investment With Co-Obligation | Loan operations      
Disclosure of fair value measurement of assets [line items]      
Net income / (loss) (621) 2,603  
Restricted Investment With Co-Obligation | Foreign borrowing through securities      
Disclosure of fair value measurement of assets [line items]      
Net income / (loss) 595 (2,604)  
Restricted Investment With Co-Obligation | Transfer of financial assets      
Disclosure of fair value measurement of assets [line items]      
Net income / (loss) 0 0  
Restricted Investment With Co-Obligation | Book value      
Disclosure of fair value measurement of assets [line items]      
Assets 9,366 10,590  
Liabilities 9,390 10,595  
Restricted Investment With Co-Obligation | Book value | Restricted operations on assets      
Disclosure of fair value measurement of assets [line items]      
Assets 9,167 10,078  
Liabilities 9,191 10,083  
Restricted Investment With Co-Obligation | Book value | Loan operations      
Disclosure of fair value measurement of assets [line items]      
Assets 9,167 10,078  
Liabilities 0 0  
Restricted Investment With Co-Obligation | Book value | Foreign borrowing through securities      
Disclosure of fair value measurement of assets [line items]      
Assets 0 0  
Liabilities 9,191 10,083  
Restricted Investment With Co-Obligation | Book value | Transfer of financial assets      
Disclosure of fair value measurement of assets [line items]      
Assets 199 512  
Liabilities 199 512  
Restricted Investment With Co-Obligation | Fair value      
Disclosure of fair value measurement of assets [line items]      
Assets 197 509  
Liabilities 197 508  
Restricted Investment With Co-Obligation | Fair value | Restricted operations on assets      
Disclosure of fair value measurement of assets [line items]      
Assets 0 0  
Liabilities 0 0  
Restricted Investment With Co-Obligation | Fair value | Loan operations      
Disclosure of fair value measurement of assets [line items]      
Assets 0 0  
Liabilities 0 0  
Restricted Investment With Co-Obligation | Fair value | Foreign borrowing through securities      
Disclosure of fair value measurement of assets [line items]      
Assets 0 0  
Liabilities 0 0  
Restricted Investment With Co-Obligation | Fair value | Transfer of financial assets      
Disclosure of fair value measurement of assets [line items]      
Assets 197 509  
Liabilities R$ 197 R$ 508