v3.26.1
Risk and Capital Management - Schedule of Financial Assets Individually Evaluated Classified by Rating (Details) - BRL (R$)
R$ in Millions
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Disclosure of financial assets [line items]    
Other financial assets R$ 1,512,220 R$ 1,396,543
Other financial assets, percentage 100.00% 100.00%
Low    
Disclosure of financial assets [line items]    
Other financial assets R$ 1,507,025 R$ 1,365,184
Medium    
Disclosure of financial assets [line items]    
Other financial assets 2,238 26,886
High    
Disclosure of financial assets [line items]    
Other financial assets 2,957 4,473
Interbank deposits and securities purchased under agreements to resell    
Disclosure of financial assets [line items]    
Other financial assets R$ 346,790 R$ 310,151
Other financial assets, percentage 22.90% 22.20%
Interbank deposits and securities purchased under agreements to resell | Low    
Disclosure of financial assets [line items]    
Other financial assets R$ 346,790 R$ 310,151
Interbank deposits and securities purchased under agreements to resell | Medium    
Disclosure of financial assets [line items]    
Other financial assets 0 0
Interbank deposits and securities purchased under agreements to resell | High    
Disclosure of financial assets [line items]    
Other financial assets 0 0
Securities    
Disclosure of financial assets [line items]    
Other financial assets R$ 329,965 R$ 327,507
Other financial assets, percentage 21.80% 23.50%
Securities | Low    
Disclosure of financial assets [line items]    
Other financial assets R$ 325,342 R$ 318,322
Securities | Medium    
Disclosure of financial assets [line items]    
Other financial assets 2,061 5,133
Securities | High    
Disclosure of financial assets [line items]    
Other financial assets 2,562 4,052
Financial assets at fair value through other comprehensive income    
Disclosure of financial assets [line items]    
Other financial assets R$ 132,473 R$ 106,303
Other financial assets, percentage 8.80% 7.60%
Financial assets at fair value through other comprehensive income | Low    
Disclosure of financial assets [line items]    
Other financial assets R$ 132,367 R$ 106,267
Financial assets at fair value through other comprehensive income | Medium    
Disclosure of financial assets [line items]    
Other financial assets 0 18
Financial assets at fair value through other comprehensive income | High    
Disclosure of financial assets [line items]    
Other financial assets 106 18
Financial assets at fair value through profit or loss    
Disclosure of financial assets [line items]    
Other financial assets R$ 702,992 R$ 652,582
Other financial assets, percentage 46.50% 46.70%
Financial assets at fair value through profit or loss | Low    
Disclosure of financial assets [line items]    
Other financial assets R$ 702,526 R$ 630,444
Financial assets at fair value through profit or loss | Medium    
Disclosure of financial assets [line items]    
Other financial assets 177 21,735
Financial assets at fair value through profit or loss | High    
Disclosure of financial assets [line items]    
Other financial assets R$ 289 R$ 403