v3.26.1
Risk and Capital Management - Schedule of Off Balance Commitments (Details) - BRL (R$)
R$ in Millions
Dec. 31, 2025
Dec. 31, 2024
Disclosure of amounts to be recovered or settled after twelve months for classes of assets and liabilities that contain amounts to be recovered or settled both no more and more than twelve months after reporting date [line items]    
Securities sold under repurchase agreements R$ 434,607 R$ 388,787
Derivatives 69,760 85,413
Other financial liabilities 241,448 192,407
Undiscounted Cash Flows    
Disclosure of amounts to be recovered or settled after twelve months for classes of assets and liabilities that contain amounts to be recovered or settled both no more and more than twelve months after reporting date [line items]    
Deposits 1,116,952 1,059,839
Central Bank of Brazil deposits (167,275) (160,698)
Securities sold under repurchase agreements 540,833 454,198
Interbank market funds 436,174 398,447
Institutional market funds 173,878 175,678
Derivatives 69,760 85,413
Other financial liabilities 1,629 544
Total financial liabilities 2,171,951 2,013,421
Undiscounted Cash Flows | Savings    
Disclosure of amounts to be recovered or settled after twelve months for classes of assets and liabilities that contain amounts to be recovered or settled both no more and more than twelve months after reporting date [line items]    
Deposits 177,305 180,730
Central Bank of Brazil deposits (22,349) (30,763)
Undiscounted Cash Flows | Interbank    
Disclosure of amounts to be recovered or settled after twelve months for classes of assets and liabilities that contain amounts to be recovered or settled both no more and more than twelve months after reporting date [line items]    
Deposits 11,838 7,566
Undiscounted Cash Flows | Time deposit    
Disclosure of amounts to be recovered or settled after twelve months for classes of assets and liabilities that contain amounts to be recovered or settled both no more and more than twelve months after reporting date [line items]    
Deposits 791,805 740,132
Central Bank of Brazil deposits (123,934) (107,755)
Undiscounted Cash Flows | Demand    
Disclosure of amounts to be recovered or settled after twelve months for classes of assets and liabilities that contain amounts to be recovered or settled both no more and more than twelve months after reporting date [line items]    
Deposits 135,383 124,920
Central Bank of Brazil deposits (20,992) (22,180)
Undiscounted Cash Flows | Other deposits    
Disclosure of amounts to be recovered or settled after twelve months for classes of assets and liabilities that contain amounts to be recovered or settled both no more and more than twelve months after reporting date [line items]    
Deposits 621 6,491
Undiscounted Cash Flows | Government securities    
Disclosure of amounts to be recovered or settled after twelve months for classes of assets and liabilities that contain amounts to be recovered or settled both no more and more than twelve months after reporting date [line items]    
Securities sold under repurchase agreements 450,530 358,604
Undiscounted Cash Flows | Corporate securities    
Disclosure of amounts to be recovered or settled after twelve months for classes of assets and liabilities that contain amounts to be recovered or settled both no more and more than twelve months after reporting date [line items]    
Securities sold under repurchase agreements 57,208 44,249
Undiscounted Cash Flows | Foreign    
Disclosure of amounts to be recovered or settled after twelve months for classes of assets and liabilities that contain amounts to be recovered or settled both no more and more than twelve months after reporting date [line items]    
Securities sold under repurchase agreements 33,095 51,345
Undiscounted Cash Flows | Forward    
Disclosure of amounts to be recovered or settled after twelve months for classes of assets and liabilities that contain amounts to be recovered or settled both no more and more than twelve months after reporting date [line items]    
Derivatives 4,381 1,450
Undiscounted Cash Flows | Options    
Disclosure of amounts to be recovered or settled after twelve months for classes of assets and liabilities that contain amounts to be recovered or settled both no more and more than twelve months after reporting date [line items]    
Derivatives 8,402 20,588
Undiscounted Cash Flows | Swaps    
Disclosure of amounts to be recovered or settled after twelve months for classes of assets and liabilities that contain amounts to be recovered or settled both no more and more than twelve months after reporting date [line items]    
Derivatives 45,453 51,394
Undiscounted Cash Flows | Other derivatives    
Disclosure of amounts to be recovered or settled after twelve months for classes of assets and liabilities that contain amounts to be recovered or settled both no more and more than twelve months after reporting date [line items]    
Derivatives 11,524 11,981
0-30 | Undiscounted Cash Flows    
Disclosure of amounts to be recovered or settled after twelve months for classes of assets and liabilities that contain amounts to be recovered or settled both no more and more than twelve months after reporting date [line items]    
Deposits 1,011,753 894,493
Central Bank of Brazil deposits (152,376) (137,510)
Securities sold under repurchase agreements 351,460 352,257
Interbank market funds 284,186 189,700
Institutional market funds 1,048 5,163
Derivatives 11,408 10,775
Other financial liabilities 0 29
Total financial liabilities 1,507,479 1,314,907
0-30 | Undiscounted Cash Flows | Savings    
Disclosure of amounts to be recovered or settled after twelve months for classes of assets and liabilities that contain amounts to be recovered or settled both no more and more than twelve months after reporting date [line items]    
Deposits 177,305 180,730
Central Bank of Brazil deposits (22,349) (30,763)
0-30 | Undiscounted Cash Flows | Interbank    
Disclosure of amounts to be recovered or settled after twelve months for classes of assets and liabilities that contain amounts to be recovered or settled both no more and more than twelve months after reporting date [line items]    
Deposits 410 1,497
0-30 | Undiscounted Cash Flows | Time deposit    
Disclosure of amounts to be recovered or settled after twelve months for classes of assets and liabilities that contain amounts to be recovered or settled both no more and more than twelve months after reporting date [line items]    
Deposits 698,034 580,855
Central Bank of Brazil deposits (109,035) (84,567)
0-30 | Undiscounted Cash Flows | Demand    
Disclosure of amounts to be recovered or settled after twelve months for classes of assets and liabilities that contain amounts to be recovered or settled both no more and more than twelve months after reporting date [line items]    
Deposits 135,383 124,920
Central Bank of Brazil deposits (20,992) (22,180)
0-30 | Undiscounted Cash Flows | Other deposits    
Disclosure of amounts to be recovered or settled after twelve months for classes of assets and liabilities that contain amounts to be recovered or settled both no more and more than twelve months after reporting date [line items]    
Deposits 621 6,491
0-30 | Undiscounted Cash Flows | Government securities    
Disclosure of amounts to be recovered or settled after twelve months for classes of assets and liabilities that contain amounts to be recovered or settled both no more and more than twelve months after reporting date [line items]    
Securities sold under repurchase agreements 283,969 274,340
0-30 | Undiscounted Cash Flows | Corporate securities    
Disclosure of amounts to be recovered or settled after twelve months for classes of assets and liabilities that contain amounts to be recovered or settled both no more and more than twelve months after reporting date [line items]    
Securities sold under repurchase agreements 34,569 27,191
0-30 | Undiscounted Cash Flows | Foreign    
Disclosure of amounts to be recovered or settled after twelve months for classes of assets and liabilities that contain amounts to be recovered or settled both no more and more than twelve months after reporting date [line items]    
Securities sold under repurchase agreements 32,922 50,726
0-30 | Undiscounted Cash Flows | Forward    
Disclosure of amounts to be recovered or settled after twelve months for classes of assets and liabilities that contain amounts to be recovered or settled both no more and more than twelve months after reporting date [line items]    
Derivatives 3,203 1,435
0-30 | Undiscounted Cash Flows | Options    
Disclosure of amounts to be recovered or settled after twelve months for classes of assets and liabilities that contain amounts to be recovered or settled both no more and more than twelve months after reporting date [line items]    
Derivatives 513 3,902
0-30 | Undiscounted Cash Flows | Swaps    
Disclosure of amounts to be recovered or settled after twelve months for classes of assets and liabilities that contain amounts to be recovered or settled both no more and more than twelve months after reporting date [line items]    
Derivatives 5,078 3,187
0-30 | Undiscounted Cash Flows | Other derivatives    
Disclosure of amounts to be recovered or settled after twelve months for classes of assets and liabilities that contain amounts to be recovered or settled both no more and more than twelve months after reporting date [line items]    
Derivatives 2,614 2,251
31 – 365 | Undiscounted Cash Flows    
Disclosure of amounts to be recovered or settled after twelve months for classes of assets and liabilities that contain amounts to be recovered or settled both no more and more than twelve months after reporting date [line items]    
Deposits 82,363 132,640
Central Bank of Brazil deposits (11,403) (19,100)
Securities sold under repurchase agreements 34,833 23,772
Interbank market funds 60,270 114,859
Institutional market funds 11,324 15,436
Derivatives 17,187 29,805
Other financial liabilities 275 185
Total financial liabilities 194,849 297,597
31 – 365 | Undiscounted Cash Flows | Savings    
Disclosure of amounts to be recovered or settled after twelve months for classes of assets and liabilities that contain amounts to be recovered or settled both no more and more than twelve months after reporting date [line items]    
Deposits 0 0
Central Bank of Brazil deposits 0 0
31 – 365 | Undiscounted Cash Flows | Interbank    
Disclosure of amounts to be recovered or settled after twelve months for classes of assets and liabilities that contain amounts to be recovered or settled both no more and more than twelve months after reporting date [line items]    
Deposits 10,602 1,451
31 – 365 | Undiscounted Cash Flows | Time deposit    
Disclosure of amounts to be recovered or settled after twelve months for classes of assets and liabilities that contain amounts to be recovered or settled both no more and more than twelve months after reporting date [line items]    
Deposits 71,761 131,189
Central Bank of Brazil deposits (11,403) (19,100)
31 – 365 | Undiscounted Cash Flows | Demand    
Disclosure of amounts to be recovered or settled after twelve months for classes of assets and liabilities that contain amounts to be recovered or settled both no more and more than twelve months after reporting date [line items]    
Deposits 0 0
Central Bank of Brazil deposits 0 0
31 – 365 | Undiscounted Cash Flows | Other deposits    
Disclosure of amounts to be recovered or settled after twelve months for classes of assets and liabilities that contain amounts to be recovered or settled both no more and more than twelve months after reporting date [line items]    
Deposits 0 0
31 – 365 | Undiscounted Cash Flows | Government securities    
Disclosure of amounts to be recovered or settled after twelve months for classes of assets and liabilities that contain amounts to be recovered or settled both no more and more than twelve months after reporting date [line items]    
Securities sold under repurchase agreements 12,024 7,511
31 – 365 | Undiscounted Cash Flows | Corporate securities    
Disclosure of amounts to be recovered or settled after twelve months for classes of assets and liabilities that contain amounts to be recovered or settled both no more and more than twelve months after reporting date [line items]    
Securities sold under repurchase agreements 22,636 15,642
31 – 365 | Undiscounted Cash Flows | Foreign    
Disclosure of amounts to be recovered or settled after twelve months for classes of assets and liabilities that contain amounts to be recovered or settled both no more and more than twelve months after reporting date [line items]    
Securities sold under repurchase agreements 173 619
31 – 365 | Undiscounted Cash Flows | Forward    
Disclosure of amounts to be recovered or settled after twelve months for classes of assets and liabilities that contain amounts to be recovered or settled both no more and more than twelve months after reporting date [line items]    
Derivatives 1,033 2
31 – 365 | Undiscounted Cash Flows | Options    
Disclosure of amounts to be recovered or settled after twelve months for classes of assets and liabilities that contain amounts to be recovered or settled both no more and more than twelve months after reporting date [line items]    
Derivatives 3,951 14,825
31 – 365 | Undiscounted Cash Flows | Swaps    
Disclosure of amounts to be recovered or settled after twelve months for classes of assets and liabilities that contain amounts to be recovered or settled both no more and more than twelve months after reporting date [line items]    
Derivatives 6,262 7,957
31 – 365 | Undiscounted Cash Flows | Other derivatives    
Disclosure of amounts to be recovered or settled after twelve months for classes of assets and liabilities that contain amounts to be recovered or settled both no more and more than twelve months after reporting date [line items]    
Derivatives 5,941 7,021
366-720 | Undiscounted Cash Flows    
Disclosure of amounts to be recovered or settled after twelve months for classes of assets and liabilities that contain amounts to be recovered or settled both no more and more than twelve months after reporting date [line items]    
Deposits 11,753 14,588
Central Bank of Brazil deposits (1,737) (1,564)
Securities sold under repurchase agreements 2,639 572
Interbank market funds 39,307 33,650
Institutional market funds 69,055 54,277
Derivatives 12,023 12,566
Other financial liabilities 117 138
Total financial liabilities 133,157 114,227
366-720 | Undiscounted Cash Flows | Savings    
Disclosure of amounts to be recovered or settled after twelve months for classes of assets and liabilities that contain amounts to be recovered or settled both no more and more than twelve months after reporting date [line items]    
Deposits 0 0
Central Bank of Brazil deposits 0 0
366-720 | Undiscounted Cash Flows | Interbank    
Disclosure of amounts to be recovered or settled after twelve months for classes of assets and liabilities that contain amounts to be recovered or settled both no more and more than twelve months after reporting date [line items]    
Deposits 824 3,848
366-720 | Undiscounted Cash Flows | Time deposit    
Disclosure of amounts to be recovered or settled after twelve months for classes of assets and liabilities that contain amounts to be recovered or settled both no more and more than twelve months after reporting date [line items]    
Deposits 10,929 10,740
Central Bank of Brazil deposits (1,737) (1,564)
366-720 | Undiscounted Cash Flows | Demand    
Disclosure of amounts to be recovered or settled after twelve months for classes of assets and liabilities that contain amounts to be recovered or settled both no more and more than twelve months after reporting date [line items]    
Deposits 0 0
Central Bank of Brazil deposits 0 0
366-720 | Undiscounted Cash Flows | Other deposits    
Disclosure of amounts to be recovered or settled after twelve months for classes of assets and liabilities that contain amounts to be recovered or settled both no more and more than twelve months after reporting date [line items]    
Deposits 0 0
366-720 | Undiscounted Cash Flows | Government securities    
Disclosure of amounts to be recovered or settled after twelve months for classes of assets and liabilities that contain amounts to be recovered or settled both no more and more than twelve months after reporting date [line items]    
Securities sold under repurchase agreements 2,639 290
366-720 | Undiscounted Cash Flows | Corporate securities    
Disclosure of amounts to be recovered or settled after twelve months for classes of assets and liabilities that contain amounts to be recovered or settled both no more and more than twelve months after reporting date [line items]    
Securities sold under repurchase agreements 0 282
366-720 | Undiscounted Cash Flows | Foreign    
Disclosure of amounts to be recovered or settled after twelve months for classes of assets and liabilities that contain amounts to be recovered or settled both no more and more than twelve months after reporting date [line items]    
Securities sold under repurchase agreements 0 0
366-720 | Undiscounted Cash Flows | Forward    
Disclosure of amounts to be recovered or settled after twelve months for classes of assets and liabilities that contain amounts to be recovered or settled both no more and more than twelve months after reporting date [line items]    
Derivatives 119 0
366-720 | Undiscounted Cash Flows | Options    
Disclosure of amounts to be recovered or settled after twelve months for classes of assets and liabilities that contain amounts to be recovered or settled both no more and more than twelve months after reporting date [line items]    
Derivatives 1,496 1,065
366-720 | Undiscounted Cash Flows | Swaps    
Disclosure of amounts to be recovered or settled after twelve months for classes of assets and liabilities that contain amounts to be recovered or settled both no more and more than twelve months after reporting date [line items]    
Derivatives 8,601 10,065
366-720 | Undiscounted Cash Flows | Other derivatives    
Disclosure of amounts to be recovered or settled after twelve months for classes of assets and liabilities that contain amounts to be recovered or settled both no more and more than twelve months after reporting date [line items]    
Derivatives 1,807 1,436
Over 720 days | Undiscounted Cash Flows    
Disclosure of amounts to be recovered or settled after twelve months for classes of assets and liabilities that contain amounts to be recovered or settled both no more and more than twelve months after reporting date [line items]    
Deposits 11,083 18,118
Central Bank of Brazil deposits (1,759) (2,524)
Securities sold under repurchase agreements 151,901 77,597
Interbank market funds 52,411 60,238
Institutional market funds 92,451 100,802
Derivatives 29,142 32,267
Other financial liabilities 1,237 192
Total financial liabilities 336,466 286,690
Over 720 days | Undiscounted Cash Flows | Savings    
Disclosure of amounts to be recovered or settled after twelve months for classes of assets and liabilities that contain amounts to be recovered or settled both no more and more than twelve months after reporting date [line items]    
Deposits 0 0
Central Bank of Brazil deposits 0 0
Over 720 days | Undiscounted Cash Flows | Interbank    
Disclosure of amounts to be recovered or settled after twelve months for classes of assets and liabilities that contain amounts to be recovered or settled both no more and more than twelve months after reporting date [line items]    
Deposits 2 770
Over 720 days | Undiscounted Cash Flows | Time deposit    
Disclosure of amounts to be recovered or settled after twelve months for classes of assets and liabilities that contain amounts to be recovered or settled both no more and more than twelve months after reporting date [line items]    
Deposits 11,081 17,348
Central Bank of Brazil deposits (1,759) (2,524)
Over 720 days | Undiscounted Cash Flows | Demand    
Disclosure of amounts to be recovered or settled after twelve months for classes of assets and liabilities that contain amounts to be recovered or settled both no more and more than twelve months after reporting date [line items]    
Deposits 0 0
Central Bank of Brazil deposits 0 0
Over 720 days | Undiscounted Cash Flows | Other deposits    
Disclosure of amounts to be recovered or settled after twelve months for classes of assets and liabilities that contain amounts to be recovered or settled both no more and more than twelve months after reporting date [line items]    
Deposits 0 0
Over 720 days | Undiscounted Cash Flows | Government securities    
Disclosure of amounts to be recovered or settled after twelve months for classes of assets and liabilities that contain amounts to be recovered or settled both no more and more than twelve months after reporting date [line items]    
Securities sold under repurchase agreements 151,898 76,463
Over 720 days | Undiscounted Cash Flows | Corporate securities    
Disclosure of amounts to be recovered or settled after twelve months for classes of assets and liabilities that contain amounts to be recovered or settled both no more and more than twelve months after reporting date [line items]    
Securities sold under repurchase agreements 3 1,134
Over 720 days | Undiscounted Cash Flows | Foreign    
Disclosure of amounts to be recovered or settled after twelve months for classes of assets and liabilities that contain amounts to be recovered or settled both no more and more than twelve months after reporting date [line items]    
Securities sold under repurchase agreements 0 0
Over 720 days | Undiscounted Cash Flows | Forward    
Disclosure of amounts to be recovered or settled after twelve months for classes of assets and liabilities that contain amounts to be recovered or settled both no more and more than twelve months after reporting date [line items]    
Derivatives 26 13
Over 720 days | Undiscounted Cash Flows | Options    
Disclosure of amounts to be recovered or settled after twelve months for classes of assets and liabilities that contain amounts to be recovered or settled both no more and more than twelve months after reporting date [line items]    
Derivatives 2,442 796
Over 720 days | Undiscounted Cash Flows | Swaps    
Disclosure of amounts to be recovered or settled after twelve months for classes of assets and liabilities that contain amounts to be recovered or settled both no more and more than twelve months after reporting date [line items]    
Derivatives 25,512 30,185
Over 720 days | Undiscounted Cash Flows | Other derivatives    
Disclosure of amounts to be recovered or settled after twelve months for classes of assets and liabilities that contain amounts to be recovered or settled both no more and more than twelve months after reporting date [line items]    
Derivatives R$ 1,162 R$ 1,273