v3.26.1
Derivatives - Schedule of Derivative Financial Instruments Portfolio (Assets And Liabilities) (Details) - BRL (R$)
R$ in Millions
Dec. 31, 2025
Dec. 31, 2024
Disclosure of fair value measurement of assets [line items]    
Notional amount   R$ 6,795,446
Derivatives R$ 73,384 92,439
Derivatives    
Disclosure of fair value measurement of assets [line items]    
Notional amount 13,835,631 6,795,446
Derivatives 73,384 92,439
Fair value - liability (69,760) (85,413)
Derivatives | Futures    
Disclosure of fair value measurement of assets [line items]    
Fair value - liability 0 0
Derivatives | Forward    
Disclosure of fair value measurement of assets [line items]    
Fair value - liability (4,381) (1,450)
Derivatives | Options    
Disclosure of fair value measurement of assets [line items]    
Fair value - liability (8,402) (20,588)
Derivatives | Swaps    
Disclosure of fair value measurement of assets [line items]    
Fair value - liability (45,453) (51,394)
Derivatives | NDF    
Disclosure of fair value measurement of assets [line items]    
Fair value - liability (10,929) (10,761)
Derivatives | Credit derivatives    
Disclosure of fair value measurement of assets [line items]    
Fair value - liability (367) (795)
Derivatives | Other    
Disclosure of fair value measurement of assets [line items]    
Fair value - liability (228) (425)
Derivatives | Stock exchange    
Disclosure of fair value measurement of assets [line items]    
Notional amount 10,844,286 3,452,914
Derivatives 30,522 48,562
Fair value - liability (25,929) (47,800)
Derivatives | Stock exchange | Futures    
Disclosure of fair value measurement of assets [line items]    
Fair value - liability 0  
Derivatives | Stock exchange | Forward    
Disclosure of fair value measurement of assets [line items]    
Fair value - liability (6)  
Derivatives | Stock exchange | Options    
Disclosure of fair value measurement of assets [line items]    
Fair value - liability (3,920)  
Derivatives | Stock exchange | Swaps    
Disclosure of fair value measurement of assets [line items]    
Fair value - liability (20,200)  
Derivatives | Stock exchange | NDF    
Disclosure of fair value measurement of assets [line items]    
Fair value - liability (1,556)  
Derivatives | Stock exchange | Credit derivatives    
Disclosure of fair value measurement of assets [line items]    
Fair value - liability (184)  
Derivatives | Stock exchange | Other    
Disclosure of fair value measurement of assets [line items]    
Fair value - liability (63)  
Derivatives | Over-the-counter market    
Disclosure of fair value measurement of assets [line items]    
Notional amount 2,991,345 3,342,532
Derivatives 42,862 43,877
Fair value - liability (43,831) (37,613)
Derivatives | Over-the-counter market | Futures    
Disclosure of fair value measurement of assets [line items]    
Fair value - liability 0  
Derivatives | Over-the-counter market | Forward    
Disclosure of fair value measurement of assets [line items]    
Fair value - liability (4,375)  
Derivatives | Over-the-counter market | Options    
Disclosure of fair value measurement of assets [line items]    
Fair value - liability (4,482)  
Derivatives | Over-the-counter market | Swaps    
Disclosure of fair value measurement of assets [line items]    
Fair value - liability (25,253)  
Derivatives | Over-the-counter market | NDF    
Disclosure of fair value measurement of assets [line items]    
Fair value - liability (9,373)  
Derivatives | Over-the-counter market | Credit derivatives    
Disclosure of fair value measurement of assets [line items]    
Fair value - liability (183)  
Derivatives | Over-the-counter market | Other    
Disclosure of fair value measurement of assets [line items]    
Fair value - liability (165)  
Derivatives | Financial institutions    
Disclosure of fair value measurement of assets [line items]    
Notional amount 2,265,335 2,766,467
Derivatives 29,102 23,262
Fair value - liability (27,063) (20,154)
Derivatives | Financial institutions | Futures    
Disclosure of fair value measurement of assets [line items]    
Fair value - liability 0  
Derivatives | Financial institutions | Forward    
Disclosure of fair value measurement of assets [line items]    
Fair value - liability (3,285)  
Derivatives | Financial institutions | Options    
Disclosure of fair value measurement of assets [line items]    
Fair value - liability (2,271)  
Derivatives | Financial institutions | Swaps    
Disclosure of fair value measurement of assets [line items]    
Fair value - liability (16,909)  
Derivatives | Financial institutions | NDF    
Disclosure of fair value measurement of assets [line items]    
Fair value - liability (4,318)  
Derivatives | Financial institutions | Credit derivatives    
Disclosure of fair value measurement of assets [line items]    
Fair value - liability (183)  
Derivatives | Financial institutions | Other    
Disclosure of fair value measurement of assets [line items]    
Fair value - liability (97)  
Derivatives | Companies    
Disclosure of fair value measurement of assets [line items]    
Notional amount 682,732 541,300
Derivatives 12,947 1,076
Fair value - liability (14,041) (1,713)
Derivatives | Companies | Futures    
Disclosure of fair value measurement of assets [line items]    
Fair value - liability 0  
Derivatives | Companies | Forward    
Disclosure of fair value measurement of assets [line items]    
Fair value - liability (1,047)  
Derivatives | Companies | Options    
Disclosure of fair value measurement of assets [line items]    
Fair value - liability (2,171)  
Derivatives | Companies | Swaps    
Disclosure of fair value measurement of assets [line items]    
Fair value - liability (5,759)  
Derivatives | Companies | NDF    
Disclosure of fair value measurement of assets [line items]    
Fair value - liability (4,996)  
Derivatives | Companies | Credit derivatives    
Disclosure of fair value measurement of assets [line items]    
Fair value - liability 0  
Derivatives | Companies | Other    
Disclosure of fair value measurement of assets [line items]    
Fair value - liability (68)  
Derivatives | Individuals    
Disclosure of fair value measurement of assets [line items]    
Notional amount 43,278 34,765
Derivatives 813 19,539
Fair value - liability (2,727) (15,746)
Derivatives | Individuals | Futures    
Disclosure of fair value measurement of assets [line items]    
Fair value - liability 0  
Derivatives | Individuals | Forward    
Disclosure of fair value measurement of assets [line items]    
Fair value - liability (43)  
Derivatives | Individuals | Options    
Disclosure of fair value measurement of assets [line items]    
Fair value - liability (40)  
Derivatives | Individuals | Swaps    
Disclosure of fair value measurement of assets [line items]    
Fair value - liability (2,585)  
Derivatives | Individuals | NDF    
Disclosure of fair value measurement of assets [line items]    
Fair value - liability (59)  
Derivatives | Individuals | Credit derivatives    
Disclosure of fair value measurement of assets [line items]    
Fair value - liability 0  
Derivatives | Individuals | Other    
Disclosure of fair value measurement of assets [line items]    
Fair value - liability 0  
Derivatives | 0-30    
Disclosure of fair value measurement of assets [line items]    
Notional amount 2,935,988 1,666,491
Derivatives 11,301 15,232
Fair value - liability (11,408) (10,775)
Derivatives | 0-30 | Futures    
Disclosure of fair value measurement of assets [line items]    
Fair value - liability 0  
Derivatives | 0-30 | Forward    
Disclosure of fair value measurement of assets [line items]    
Fair value - liability (3,203)  
Derivatives | 0-30 | Options    
Disclosure of fair value measurement of assets [line items]    
Fair value - liability (513)  
Derivatives | 0-30 | Swaps    
Disclosure of fair value measurement of assets [line items]    
Fair value - liability (5,078)  
Derivatives | 0-30 | NDF    
Disclosure of fair value measurement of assets [line items]    
Fair value - liability (2,574)  
Derivatives | 0-30 | Credit derivatives    
Disclosure of fair value measurement of assets [line items]    
Fair value - liability 0  
Derivatives | 0-30 | Other    
Disclosure of fair value measurement of assets [line items]    
Fair value - liability (40)  
Derivatives | 31-90    
Disclosure of fair value measurement of assets [line items]    
Notional amount 1,763,119 649,948
Derivatives 4,662 6,405
Fair value - liability (4,414) (7,206)
Derivatives | 31-90 | Futures    
Disclosure of fair value measurement of assets [line items]    
Fair value - liability 0  
Derivatives | 31-90 | Forward    
Disclosure of fair value measurement of assets [line items]    
Fair value - liability (621)  
Derivatives | 31-90 | Options    
Disclosure of fair value measurement of assets [line items]    
Fair value - liability (895)  
Derivatives | 31-90 | Swaps    
Disclosure of fair value measurement of assets [line items]    
Fair value - liability (1,397)  
Derivatives | 31-90 | NDF    
Disclosure of fair value measurement of assets [line items]    
Fair value - liability (1,500)  
Derivatives | 31-90 | Credit derivatives    
Disclosure of fair value measurement of assets [line items]    
Fair value - liability 0  
Derivatives | 31-90 | Other    
Disclosure of fair value measurement of assets [line items]    
Fair value - liability (1)  
Derivatives | 91-365    
Disclosure of fair value measurement of assets [line items]    
Notional amount 6,276,091 2,404,815
Derivatives 13,399 19,804
Fair value - liability (12,773) (22,599)
Derivatives | 91-365 | Futures    
Disclosure of fair value measurement of assets [line items]    
Fair value - liability 0  
Derivatives | 91-365 | Forward    
Disclosure of fair value measurement of assets [line items]    
Fair value - liability (412)  
Derivatives | 91-365 | Options    
Disclosure of fair value measurement of assets [line items]    
Fair value - liability (3,056)  
Derivatives | 91-365 | Swaps    
Disclosure of fair value measurement of assets [line items]    
Fair value - liability (4,865)  
Derivatives | 91-365 | NDF    
Disclosure of fair value measurement of assets [line items]    
Fair value - liability (4,399)  
Derivatives | 91-365 | Credit derivatives    
Disclosure of fair value measurement of assets [line items]    
Fair value - liability (4)  
Derivatives | 91-365 | Other    
Disclosure of fair value measurement of assets [line items]    
Fair value - liability (37)  
Derivatives | 366-720    
Disclosure of fair value measurement of assets [line items]    
Notional amount 1,094,704 763,763
Derivatives 12,641 11,330
Fair value - liability (12,023) (12,566)
Derivatives | 366-720 | Futures    
Disclosure of fair value measurement of assets [line items]    
Fair value - liability 0  
Derivatives | 366-720 | Forward    
Disclosure of fair value measurement of assets [line items]    
Fair value - liability (119)  
Derivatives | 366-720 | Options    
Disclosure of fair value measurement of assets [line items]    
Fair value - liability (1,496)  
Derivatives | 366-720 | Swaps    
Disclosure of fair value measurement of assets [line items]    
Fair value - liability (8,601)  
Derivatives | 366-720 | NDF    
Disclosure of fair value measurement of assets [line items]    
Fair value - liability (1,749)  
Derivatives | 366-720 | Credit derivatives    
Disclosure of fair value measurement of assets [line items]    
Fair value - liability (52)  
Derivatives | 366-720 | Other    
Disclosure of fair value measurement of assets [line items]    
Fair value - liability (6)  
Derivatives | Over 720 days    
Disclosure of fair value measurement of assets [line items]    
Notional amount 1,765,729 1,310,429
Derivatives 31,381 39,668
Fair value - liability (29,142) (32,267)
Derivatives | Over 720 days | Futures    
Disclosure of fair value measurement of assets [line items]    
Fair value - liability 0  
Derivatives | Over 720 days | Forward    
Disclosure of fair value measurement of assets [line items]    
Fair value - liability (26)  
Derivatives | Over 720 days | Options    
Disclosure of fair value measurement of assets [line items]    
Fair value - liability (2,442)  
Derivatives | Over 720 days | Swaps    
Disclosure of fair value measurement of assets [line items]    
Fair value - liability (25,512)  
Derivatives | Over 720 days | NDF    
Disclosure of fair value measurement of assets [line items]    
Fair value - liability (707)  
Derivatives | Over 720 days | Credit derivatives    
Disclosure of fair value measurement of assets [line items]    
Fair value - liability (311)  
Derivatives | Over 720 days | Other    
Disclosure of fair value measurement of assets [line items]    
Fair value - liability (144)  
Futures    
Disclosure of fair value measurement of assets [line items]    
Notional amount   868,983
Futures | Derivatives    
Disclosure of fair value measurement of assets [line items]    
Notional amount 1,316,911  
Derivatives 0 0
Futures | Derivatives | Stock exchange    
Disclosure of fair value measurement of assets [line items]    
Notional amount 1,316,883  
Derivatives 0  
Futures | Derivatives | Over-the-counter market    
Disclosure of fair value measurement of assets [line items]    
Notional amount 28  
Derivatives 0  
Futures | Derivatives | Financial institutions    
Disclosure of fair value measurement of assets [line items]    
Notional amount 28  
Derivatives 0  
Futures | Derivatives | Companies    
Disclosure of fair value measurement of assets [line items]    
Notional amount 0  
Derivatives 0  
Futures | Derivatives | Individuals    
Disclosure of fair value measurement of assets [line items]    
Notional amount 0  
Derivatives 0  
Futures | Derivatives | 0-30    
Disclosure of fair value measurement of assets [line items]    
Notional amount 499,584  
Derivatives 0  
Futures | Derivatives | 31-90    
Disclosure of fair value measurement of assets [line items]    
Notional amount 224,069  
Derivatives 0  
Futures | Derivatives | 91-365    
Disclosure of fair value measurement of assets [line items]    
Notional amount 240,613  
Derivatives 0  
Futures | Derivatives | 366-720    
Disclosure of fair value measurement of assets [line items]    
Notional amount 140,341  
Derivatives 0  
Futures | Derivatives | Over 720 days    
Disclosure of fair value measurement of assets [line items]    
Notional amount 212,304  
Derivatives 0  
Forward    
Disclosure of fair value measurement of assets [line items]    
Notional amount   5,273
Forward | Derivatives    
Disclosure of fair value measurement of assets [line items]    
Notional amount 170,358  
Derivatives 4,607 1,739
Forward | Derivatives | Stock exchange    
Disclosure of fair value measurement of assets [line items]    
Notional amount 9,855  
Derivatives 420  
Forward | Derivatives | Over-the-counter market    
Disclosure of fair value measurement of assets [line items]    
Notional amount 160,503  
Derivatives 4,187  
Forward | Derivatives | Financial institutions    
Disclosure of fair value measurement of assets [line items]    
Notional amount 118,102  
Derivatives 3,075  
Forward | Derivatives | Companies    
Disclosure of fair value measurement of assets [line items]    
Notional amount 42,356  
Derivatives 1,111  
Forward | Derivatives | Individuals    
Disclosure of fair value measurement of assets [line items]    
Notional amount 45  
Derivatives 1  
Forward | Derivatives | 0-30    
Disclosure of fair value measurement of assets [line items]    
Notional amount 56,115  
Derivatives 2,037  
Forward | Derivatives | 31-90    
Disclosure of fair value measurement of assets [line items]    
Notional amount 34,281  
Derivatives 414  
Forward | Derivatives | 91-365    
Disclosure of fair value measurement of assets [line items]    
Notional amount 61,371  
Derivatives 1,462  
Forward | Derivatives | 366-720    
Disclosure of fair value measurement of assets [line items]    
Notional amount 12,554  
Derivatives 543  
Forward | Derivatives | Over 720 days    
Disclosure of fair value measurement of assets [line items]    
Notional amount 6,037  
Derivatives 151  
Options    
Disclosure of fair value measurement of assets [line items]    
Notional amount   2,325,428
Options | Derivatives    
Disclosure of fair value measurement of assets [line items]    
Notional amount 6,824,202  
Derivatives 11,726 21,170
Options | Derivatives | Stock exchange    
Disclosure of fair value measurement of assets [line items]    
Notional amount 6,694,178  
Derivatives 7,995  
Options | Derivatives | Over-the-counter market    
Disclosure of fair value measurement of assets [line items]    
Notional amount 130,024  
Derivatives 3,731  
Options | Derivatives | Financial institutions    
Disclosure of fair value measurement of assets [line items]    
Notional amount 81,893  
Derivatives 2,153  
Options | Derivatives | Companies    
Disclosure of fair value measurement of assets [line items]    
Notional amount 44,662  
Derivatives 1,500  
Options | Derivatives | Individuals    
Disclosure of fair value measurement of assets [line items]    
Notional amount 3,469  
Derivatives 78  
Options | Derivatives | 0-30    
Disclosure of fair value measurement of assets [line items]    
Notional amount 1,452,351  
Derivatives 1,388  
Options | Derivatives | 31-90    
Disclosure of fair value measurement of assets [line items]    
Notional amount 833,624  
Derivatives 1,264  
Options | Derivatives | 91-365    
Disclosure of fair value measurement of assets [line items]    
Notional amount 4,419,485  
Derivatives 3,895  
Options | Derivatives | 366-720    
Disclosure of fair value measurement of assets [line items]    
Notional amount 74,601  
Derivatives 1,864  
Options | Derivatives | Over 720 days    
Disclosure of fair value measurement of assets [line items]    
Notional amount 44,141  
Derivatives 3,315  
Swaps    
Disclosure of fair value measurement of assets [line items]    
Notional amount   2,844,414
Swaps | Derivatives    
Disclosure of fair value measurement of assets [line items]    
Notional amount 4,603,623  
Derivatives 47,184 55,428
Swaps | Derivatives | Stock exchange    
Disclosure of fair value measurement of assets [line items]    
Notional amount 2,631,330  
Derivatives 20,217  
Swaps | Derivatives | Over-the-counter market    
Disclosure of fair value measurement of assets [line items]    
Notional amount 1,972,293  
Derivatives 26,967  
Swaps | Derivatives | Financial institutions    
Disclosure of fair value measurement of assets [line items]    
Notional amount 1,593,922  
Derivatives 18,975  
Swaps | Derivatives | Companies    
Disclosure of fair value measurement of assets [line items]    
Notional amount 341,383  
Derivatives 7,312  
Swaps | Derivatives | Individuals    
Disclosure of fair value measurement of assets [line items]    
Notional amount 36,988  
Derivatives 680  
Swaps | Derivatives | 0-30    
Disclosure of fair value measurement of assets [line items]    
Notional amount 686,500  
Derivatives 4,885  
Swaps | Derivatives | 31-90    
Disclosure of fair value measurement of assets [line items]    
Notional amount 515,001  
Derivatives 1,264  
Swaps | Derivatives | 91-365    
Disclosure of fair value measurement of assets [line items]    
Notional amount 1,222,548  
Derivatives 4,826  
Swaps | Derivatives | 366-720    
Disclosure of fair value measurement of assets [line items]    
Notional amount 773,310  
Derivatives 9,371  
Swaps | Derivatives | Over 720 days    
Disclosure of fair value measurement of assets [line items]    
Notional amount 1,406,264  
Derivatives 26,838  
NDF    
Disclosure of fair value measurement of assets [line items]    
Notional amount   632,408
NDF | Derivatives    
Disclosure of fair value measurement of assets [line items]    
Notional amount 794,088  
Derivatives 8,351 12,207
NDF | Derivatives | Stock exchange    
Disclosure of fair value measurement of assets [line items]    
Notional amount 143,224  
Derivatives 1,137  
NDF | Derivatives | Over-the-counter market    
Disclosure of fair value measurement of assets [line items]    
Notional amount 650,864  
Derivatives 7,214  
NDF | Derivatives | Financial institutions    
Disclosure of fair value measurement of assets [line items]    
Notional amount 397,802  
Derivatives 4,153  
NDF | Derivatives | Companies    
Disclosure of fair value measurement of assets [line items]    
Notional amount 250,286  
Derivatives 3,007  
NDF | Derivatives | Individuals    
Disclosure of fair value measurement of assets [line items]    
Notional amount 2,776  
Derivatives 54  
NDF | Derivatives | 0-30    
Disclosure of fair value measurement of assets [line items]    
Notional amount 237,606  
Derivatives 2,223  
NDF | Derivatives | 31-90    
Disclosure of fair value measurement of assets [line items]    
Notional amount 155,756  
Derivatives 1,719  
NDF | Derivatives | 91-365    
Disclosure of fair value measurement of assets [line items]    
Notional amount 281,022  
Derivatives 3,153  
NDF | Derivatives | 366-720    
Disclosure of fair value measurement of assets [line items]    
Notional amount 73,963  
Derivatives 749  
NDF | Derivatives | Over 720 days    
Disclosure of fair value measurement of assets [line items]    
Notional amount 45,741  
Derivatives 507  
Credit derivatives    
Disclosure of fair value measurement of assets [line items]    
Notional amount   100,812
Credit derivatives | Derivatives    
Disclosure of fair value measurement of assets [line items]    
Notional amount 115,272  
Derivatives 615 633
Credit derivatives | Derivatives | Stock exchange    
Disclosure of fair value measurement of assets [line items]    
Notional amount 48,710  
Derivatives 163  
Credit derivatives | Derivatives | Over-the-counter market    
Disclosure of fair value measurement of assets [line items]    
Notional amount 66,562  
Derivatives 452  
Credit derivatives | Derivatives | Financial institutions    
Disclosure of fair value measurement of assets [line items]    
Notional amount 66,562  
Derivatives 452  
Credit derivatives | Derivatives | Companies    
Disclosure of fair value measurement of assets [line items]    
Notional amount 0  
Derivatives 0  
Credit derivatives | Derivatives | Individuals    
Disclosure of fair value measurement of assets [line items]    
Notional amount 0  
Derivatives 0  
Credit derivatives | Derivatives | 0-30    
Disclosure of fair value measurement of assets [line items]    
Notional amount 2,751  
Derivatives 198  
Credit derivatives | Derivatives | 31-90    
Disclosure of fair value measurement of assets [line items]    
Notional amount 0  
Derivatives 0  
Credit derivatives | Derivatives | 91-365    
Disclosure of fair value measurement of assets [line items]    
Notional amount 50,417  
Derivatives 57  
Credit derivatives | Derivatives | 366-720    
Disclosure of fair value measurement of assets [line items]    
Notional amount 17,752  
Derivatives 97  
Credit derivatives | Derivatives | Over 720 days    
Disclosure of fair value measurement of assets [line items]    
Notional amount 44,352  
Derivatives 263  
Other    
Disclosure of fair value measurement of assets [line items]    
Notional amount   18,128
Other | Derivatives    
Disclosure of fair value measurement of assets [line items]    
Notional amount 11,177  
Derivatives 901 R$ 1,262
Other | Derivatives | Stock exchange    
Disclosure of fair value measurement of assets [line items]    
Notional amount 106  
Derivatives 590  
Other | Derivatives | Over-the-counter market    
Disclosure of fair value measurement of assets [line items]    
Notional amount 11,071  
Derivatives 311  
Other | Derivatives | Financial institutions    
Disclosure of fair value measurement of assets [line items]    
Notional amount 7,026  
Derivatives 294  
Other | Derivatives | Companies    
Disclosure of fair value measurement of assets [line items]    
Notional amount 4,045  
Derivatives 17  
Other | Derivatives | Individuals    
Disclosure of fair value measurement of assets [line items]    
Notional amount 0  
Derivatives 0  
Other | Derivatives | 0-30    
Disclosure of fair value measurement of assets [line items]    
Notional amount 1,081  
Derivatives 570  
Other | Derivatives | 31-90    
Disclosure of fair value measurement of assets [line items]    
Notional amount 388  
Derivatives 1  
Other | Derivatives | 91-365    
Disclosure of fair value measurement of assets [line items]    
Notional amount 635  
Derivatives 6  
Other | Derivatives | 366-720    
Disclosure of fair value measurement of assets [line items]    
Notional amount 2,183  
Derivatives 17  
Other | Derivatives | Over 720 days    
Disclosure of fair value measurement of assets [line items]    
Notional amount 6,890  
Derivatives R$ 307