v3.26.1
Taxes - Schedule of Deferred Tax Asset Balance and Respective Changes (Details) - BRL (R$)
R$ in Millions
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]    
Beginning balance, deferred tax assets R$ 70,206 R$ 61,668
Realization / Reversal (22,267) (17,527)
Increase 27,471 26,065
Ending balance, deferred tax assets 75,410 70,206
Beginning balance, deferred tax liabilities 11,950 8,537
Realization / reversal (5,434) (2,515)
Increase 5,899 5,928
Ending balance, deferred tax liabilities 12,415 11,950
Cash flow hedge    
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]    
Beginning balance, deferred tax assets 392 108
Realization / Reversal (10) 0
Increase 0 284
Ending balance, deferred tax assets 382 392
Reflected in income    
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]    
Beginning balance, deferred tax assets 64,636 58,714
Realization / Reversal (20,385) (17,283)
Increase 27,370 23,205
Ending balance, deferred tax assets 71,621 64,636
Beginning balance, deferred tax liabilities 9,065 7,148
Realization / reversal (4,670) (2,368)
Increase 5,524 4,285
Ending balance, deferred tax liabilities 9,919 9,065
Provision for expected credit loss    
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]    
Beginning balance, deferred tax assets 43,518 38,664
Realization / Reversal (5,664) (7,436)
Increase 13,843 12,290
Ending balance, deferred tax assets 51,697 43,518
Related to tax losses and social contribution loss carryforwards    
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]    
Beginning balance, deferred tax assets 2,469 2,325
Realization / Reversal (2,053) (385)
Increase 97 529
Ending balance, deferred tax assets 513 2,469
Provision for profit sharing    
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]    
Beginning balance, deferred tax assets 3,258 2,794
Realization / Reversal (3,258) (2,794)
Increase 3,623 3,258
Ending balance, deferred tax assets 3,623 3,258
Provisions    
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]    
Beginning balance, deferred tax assets 6,277 5,869
Realization / Reversal (3,406) (2,354)
Increase 2,993 2,762
Ending balance, deferred tax assets 5,864 6,277
Civil lawsuits    
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]    
Beginning balance, deferred tax assets 1,239 1,227
Realization / Reversal (665) (730)
Increase 641 742
Ending balance, deferred tax assets 1,215 1,239
Labor claims    
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]    
Beginning balance, deferred tax assets 3,174 2,867
Realization / Reversal (1,386) (1,509)
Increase 1,755 1,816
Ending balance, deferred tax assets 3,543 3,174
Tax and social security obligations    
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]    
Beginning balance, deferred tax assets 1,864 1,775
Realization / Reversal (1,355) (115)
Increase 597 204
Ending balance, deferred tax assets 1,106 1,864
Legal obligations    
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]    
Beginning balance, deferred tax assets 375 279
Realization / Reversal (135) (15)
Increase 140 111
Ending balance, deferred tax assets 380 375
Adjustments of operations carried out on the futures settlement market    
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]    
Beginning balance, deferred tax assets 787 0
Realization / Reversal (787) 0
Increase 0 787
Ending balance, deferred tax assets 0 787
Beginning balance, deferred tax liabilities 0 416
Realization / reversal 0 (416)
Increase 185 0
Ending balance, deferred tax liabilities 185 0
Adjustment to fair value of financial assets - At fair value through profit or loss    
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]    
Beginning balance, deferred tax assets 245 755
Realization / Reversal (245) (755)
Increase 15 245
Ending balance, deferred tax assets 15 245
Beginning balance, deferred tax liabilities 3,538 1,450
Realization / reversal (3,538) (1,450)
Increase 3,763 3,538
Ending balance, deferred tax liabilities 3,763 3,538
Provision relating to health insurance operations    
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]    
Beginning balance, deferred tax assets 365 395
Realization / Reversal 0 (30)
Increase 120 0
Ending balance, deferred tax assets 485 365
Other    
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]    
Beginning balance, deferred tax assets 7,342 7,633
Realization / Reversal (4,837) (3,514)
Increase 6,539 3,223
Ending balance, deferred tax assets 9,044 7,342
Beginning balance, deferred tax liabilities 2,642 2,825
Realization / reversal (339) (455)
Increase 876 272
Ending balance, deferred tax liabilities 3,179 2,642
Reflected in stockholders’ equity    
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]    
Beginning balance, deferred tax assets 5,570 2,954
Realization / Reversal (1,882) (244)
Increase 101 2,860
Ending balance, deferred tax assets 3,789 5,570
Beginning balance, deferred tax liabilities 2,885 1,389
Realization / reversal (764) (147)
Increase 375 1,643
Ending balance, deferred tax liabilities 2,496 2,885
Adjustment to fair value of financial assets - At fair value through other comprehensive income    
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]    
Beginning balance, deferred tax assets 4,268 2,022
Realization / Reversal (1,872) (244)
Increase 95 2,490
Ending balance, deferred tax assets 2,491 4,268
Beginning balance, deferred tax liabilities 2,881 1,381
Realization / reversal (764) (143)
Increase 372 1,643
Ending balance, deferred tax liabilities 2,489 2,881
Other    
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]    
Beginning balance, deferred tax assets 910 824
Realization / Reversal 0 0
Increase 6 86
Ending balance, deferred tax assets 916 910
Supervenience of depreciation of finance lease    
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]    
Beginning balance, deferred tax liabilities 107 130
Realization / reversal (9) (23)
Increase 0 0
Ending balance, deferred tax liabilities 98 107
Adjustment of deposits in guarantee and provisions    
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]    
Beginning balance, deferred tax liabilities 1,754 1,572
Realization / reversal (722) (9)
Increase 657 191
Ending balance, deferred tax liabilities 1,689 1,754
Post-employment benefits    
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]    
Beginning balance, deferred tax liabilities 260 15
Realization / reversal (37) (15)
Increase 34 260
Ending balance, deferred tax liabilities 257 260
Taxation of results abroad – capital gains    
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]    
Beginning balance, deferred tax liabilities 764 740
Realization / reversal (25) 0
Increase 9 24
Ending balance, deferred tax liabilities 748 764
Post-employment benefits    
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]    
Beginning balance, deferred tax liabilities 4 8
Realization / reversal 0 (4)
Increase 3 0
Ending balance, deferred tax liabilities R$ 7 R$ 4