v3.26.1
Derivatives - Schedule of Derivatives by index and Risk Factor (Details) - BRL (R$)
R$ in Millions
Dec. 31, 2025
Dec. 31, 2024
Disclosure of financial assets [line items]    
Notional amount   R$ 6,795,446
Derivatives R$ 73,384 92,439
Shares    
Disclosure of financial assets [line items]    
Notional amount 2,137,268 305,589
Derivatives 8,357 15,315
Fair value - liability (6,272) (13,359)
Commodities    
Disclosure of financial assets [line items]    
Notional amount 43,388 29,270
Derivatives 1,564 702
Fair value - liability (1,103) (692)
Interest    
Disclosure of financial assets [line items]    
Notional amount 10,454,958 5,335,062
Derivatives 49,413 47,801
Fair value - liability (47,063) (42,608)
Foreign currency    
Disclosure of financial assets [line items]    
Notional amount 1,200,017 1,125,525
Derivatives 14,050 28,621
Fair value - liability (15,322) (28,754)
Futures    
Disclosure of financial assets [line items]    
Notional amount   868,983
Futures | Shares    
Disclosure of financial assets [line items]    
Notional amount 15,858  
Derivatives 0  
Fair value - liability 0  
Futures | Commodities    
Disclosure of financial assets [line items]    
Notional amount 16,204  
Derivatives 0  
Fair value - liability 0  
Futures | Interest    
Disclosure of financial assets [line items]    
Notional amount 1,229,994  
Derivatives 0  
Fair value - liability 0  
Futures | Foreign currency    
Disclosure of financial assets [line items]    
Notional amount 54,855  
Derivatives 0  
Fair value - liability 0  
Forward    
Disclosure of financial assets [line items]    
Notional amount   5,273
Forward | Shares    
Disclosure of financial assets [line items]    
Notional amount 432  
Derivatives 418  
Fair value - liability 0  
Forward | Commodities    
Disclosure of financial assets [line items]    
Notional amount 17  
Derivatives 17  
Fair value - liability (15)  
Forward | Interest    
Disclosure of financial assets [line items]    
Notional amount 2,202  
Derivatives 2,233  
Fair value - liability (2,203)  
Forward | Foreign currency    
Disclosure of financial assets [line items]    
Notional amount 167,707  
Derivatives 1,939  
Fair value - liability (2,163)  
Options    
Disclosure of financial assets [line items]    
Notional amount   2,325,428
Options | Shares    
Disclosure of financial assets [line items]    
Notional amount 2,109,456  
Derivatives 7,246  
Fair value - liability (5,163)  
Options | Commodities    
Disclosure of financial assets [line items]    
Notional amount 15,938  
Derivatives 1,274  
Fair value - liability (526)  
Options | Interest    
Disclosure of financial assets [line items]    
Notional amount 4,538,681  
Derivatives 1,073  
Fair value - liability (673)  
Options | Foreign currency    
Disclosure of financial assets [line items]    
Notional amount 160,127  
Derivatives 2,133  
Fair value - liability (2,040)  
Swaps    
Disclosure of financial assets [line items]    
Notional amount   2,844,414
Swaps | Shares    
Disclosure of financial assets [line items]    
Notional amount 2,177  
Derivatives 556  
Fair value - liability (978)  
Swaps | Commodities    
Disclosure of financial assets [line items]    
Notional amount 49  
Derivatives 0  
Fair value - liability (100)  
Swaps | Interest    
Disclosure of financial assets [line items]    
Notional amount 4,568,007  
Derivatives 45,302  
Fair value - liability (43,777)  
Swaps | Foreign currency    
Disclosure of financial assets [line items]    
Notional amount 33,390  
Derivatives 1,326  
Fair value - liability (598)  
NDF    
Disclosure of financial assets [line items]    
Notional amount   632,408
NDF | Shares    
Disclosure of financial assets [line items]    
Notional amount 2  
Derivatives 0  
Fair value - liability 0  
NDF | Commodities    
Disclosure of financial assets [line items]    
Notional amount 10,404  
Derivatives 253  
Fair value - liability (442)  
NDF | Interest    
Disclosure of financial assets [line items]    
Notional amount 0  
Derivatives 0  
Fair value - liability 0  
NDF | Foreign currency    
Disclosure of financial assets [line items]    
Notional amount 783,682  
Derivatives 8,098  
Fair value - liability (10,487)  
Credit derivatives    
Disclosure of financial assets [line items]    
Notional amount   R$ 100,812
Credit derivatives | Shares    
Disclosure of financial assets [line items]    
Notional amount 6,616  
Derivatives 131  
Fair value - liability (104)  
Credit derivatives | Commodities    
Disclosure of financial assets [line items]    
Notional amount 2  
Derivatives 0  
Fair value - liability 0  
Credit derivatives | Interest    
Disclosure of financial assets [line items]    
Notional amount 108,642  
Derivatives 484  
Fair value - liability (263)  
Credit derivatives | Foreign currency    
Disclosure of financial assets [line items]    
Notional amount 12  
Derivatives 0  
Fair value - liability 0  
Other | Shares    
Disclosure of financial assets [line items]    
Notional amount 2,727  
Derivatives 6  
Fair value - liability (27)  
Other | Commodities    
Disclosure of financial assets [line items]    
Notional amount 774  
Derivatives 20  
Fair value - liability (20)  
Other | Interest    
Disclosure of financial assets [line items]    
Notional amount 7,432  
Derivatives 321  
Fair value - liability (147)  
Other | Foreign currency    
Disclosure of financial assets [line items]    
Notional amount 244  
Derivatives 554  
Fair value - liability R$ (34)