v3.26.1
Loan and lease operations - Schedule of Reconciliation of Expected Loan Losses for Loan Operations and Lease Operations (Details) - BRL (R$)
R$ in Millions
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Disclosure of detailed information about borrowings [line items]    
Financial assets at beginning of period R$ 2,673,301  
Financial assets at end of period 2,880,511 R$ 2,673,301
Impairment | Expected Credit Losses    
Disclosure of detailed information about borrowings [line items]    
Financial assets at beginning of period (49,024) (50,863)
Impairment loss (reversal of impairment loss) recognised in profit or loss 32,617 29,468
Write-off (33,300) (31,307)
Financial assets at end of period (48,341) (49,024)
Impairment | Individual Borrowers | Expected Credit Losses    
Disclosure of detailed information about borrowings [line items]    
Financial assets at beginning of period (29,909) (29,051)
Impairment loss (reversal of impairment loss) recognised in profit or loss 25,378 25,014
Write-off (25,110) (24,156)
Financial assets at end of period (30,177) (29,909)
Impairment | Corporate Borrowers | Expected Credit Losses    
Disclosure of detailed information about borrowings [line items]    
Financial assets at beginning of period (11,081) (15,199)
Impairment loss (reversal of impairment loss) recognised in profit or loss 5,648 1,477
Write-off (5,139) (5,595)
Financial assets at end of period (11,590) (11,081)
Impairment | Foreign Loans In Latin America | Expected Credit Losses    
Disclosure of detailed information about borrowings [line items]    
Financial assets at beginning of period (8,034) (6,613)
Impairment loss (reversal of impairment loss) recognised in profit or loss 1,591 2,977
Write-off (3,051) (1,556)
Financial assets at end of period (6,574) (8,034)
Stage 1 | Impairment | Expected Credit Losses    
Disclosure of detailed information about borrowings [line items]    
Financial assets at beginning of period (10,941) (8,743)
Impairment loss (reversal of impairment loss) recognised in profit or loss (3,637) 1,512
Write-off 0 0
Financial assets at end of period (9,823) (10,941)
Stage 1 | Impairment | Transfer to stage 2 | Expected Credit Losses    
Disclosure of detailed information about borrowings [line items]    
Increase (decrease) through transfers, financial assets (2,106) (1,571)
Stage 1 | Impairment | Transfer to stage 3 | Expected Credit Losses    
Disclosure of detailed information about borrowings [line items]    
Increase (decrease) through transfers, financial assets (297) (65)
Stage 1 | Impairment | Cure from stage 2 | Expected Credit Losses    
Disclosure of detailed information about borrowings [line items]    
Increase (decrease) through transfers, financial assets 4,328 2,266
Stage 1 | Impairment | Cure from stage 3 | Expected Credit Losses    
Disclosure of detailed information about borrowings [line items]    
Increase (decrease) through transfers, financial assets 594 56
Stage 1 | Impairment | Individual Borrowers | Expected Credit Losses    
Disclosure of detailed information about borrowings [line items]    
Financial assets at beginning of period (6,297) (4,923)
Impairment loss (reversal of impairment loss) recognised in profit or loss (1,009) 707
Write-off 0 0
Financial assets at end of period (6,385) (6,297)
Stage 1 | Impairment | Individual Borrowers | Transfer to stage 2 | Expected Credit Losses    
Disclosure of detailed information about borrowings [line items]    
Increase (decrease) through transfers, financial assets (1,420) (1,131)
Stage 1 | Impairment | Individual Borrowers | Transfer to stage 3 | Expected Credit Losses    
Disclosure of detailed information about borrowings [line items]    
Increase (decrease) through transfers, financial assets (176) (18)
Stage 1 | Impairment | Individual Borrowers | Cure from stage 2 | Expected Credit Losses    
Disclosure of detailed information about borrowings [line items]    
Increase (decrease) through transfers, financial assets 2,617 1,809
Stage 1 | Impairment | Individual Borrowers | Cure from stage 3 | Expected Credit Losses    
Disclosure of detailed information about borrowings [line items]    
Increase (decrease) through transfers, financial assets 76 7
Stage 1 | Impairment | Corporate Borrowers | Expected Credit Losses    
Disclosure of detailed information about borrowings [line items]    
Financial assets at beginning of period (2,010) (1,929)
Impairment loss (reversal of impairment loss) recognised in profit or loss (694) (48)
Write-off 0 0
Financial assets at end of period (1,596) (2,010)
Stage 1 | Impairment | Corporate Borrowers | Transfer to stage 2 | Expected Credit Losses    
Disclosure of detailed information about borrowings [line items]    
Increase (decrease) through transfers, financial assets (339) (217)
Stage 1 | Impairment | Corporate Borrowers | Transfer to stage 3 | Expected Credit Losses    
Disclosure of detailed information about borrowings [line items]    
Increase (decrease) through transfers, financial assets (45) (28)
Stage 1 | Impairment | Corporate Borrowers | Cure from stage 2 | Expected Credit Losses    
Disclosure of detailed information about borrowings [line items]    
Increase (decrease) through transfers, financial assets 634 328
Stage 1 | Impairment | Corporate Borrowers | Cure from stage 3 | Expected Credit Losses    
Disclosure of detailed information about borrowings [line items]    
Increase (decrease) through transfers, financial assets 30 46
Stage 1 | Impairment | Foreign Loans In Latin America | Expected Credit Losses    
Disclosure of detailed information about borrowings [line items]    
Financial assets at beginning of period (2,634) (1,891)
Impairment loss (reversal of impairment loss) recognised in profit or loss (1,934) 853
Write-off 0 0
Financial assets at end of period (1,842) (2,634)
Stage 1 | Impairment | Foreign Loans In Latin America | Transfer to stage 2 | Expected Credit Losses    
Disclosure of detailed information about borrowings [line items]    
Increase (decrease) through transfers, financial assets (347) (223)
Stage 1 | Impairment | Foreign Loans In Latin America | Transfer to stage 3 | Expected Credit Losses    
Disclosure of detailed information about borrowings [line items]    
Increase (decrease) through transfers, financial assets (76) (19)
Stage 1 | Impairment | Foreign Loans In Latin America | Cure from stage 2 | Expected Credit Losses    
Disclosure of detailed information about borrowings [line items]    
Increase (decrease) through transfers, financial assets 1,077 129
Stage 1 | Impairment | Foreign Loans In Latin America | Cure from stage 3 | Expected Credit Losses    
Disclosure of detailed information about borrowings [line items]    
Increase (decrease) through transfers, financial assets 488 3
Stage 2 | Impairment | Expected Credit Losses    
Disclosure of detailed information about borrowings [line items]    
Financial assets at beginning of period (9,603) (10,185)
Impairment loss (reversal of impairment loss) recognised in profit or loss 10,934 6,872
Write-off 0 0
Financial assets at end of period (12,433) (9,603)
Stage 2 | Impairment | Cure to Stage 1 | Expected Credit Losses    
Disclosure of detailed information about borrowings [line items]    
Increase (decrease) through transfers, financial assets (4,328) (2,266)
Stage 2 | Impairment | Transfer from Stage 1 | Expected Credit Losses    
Disclosure of detailed information about borrowings [line items]    
Increase (decrease) through transfers, financial assets 2,106 (1,571)
Stage 2 | Impairment | Transfer to stage 3 | Expected Credit Losses    
Disclosure of detailed information about borrowings [line items]    
Increase (decrease) through transfers, financial assets (8,712) (7,170)
Stage 2 | Impairment | Cure from stage 3 | Expected Credit Losses    
Disclosure of detailed information about borrowings [line items]    
Increase (decrease) through transfers, financial assets 2,830 411
Stage 2 | Impairment | Individual Borrowers | Expected Credit Losses    
Disclosure of detailed information about borrowings [line items]    
Financial assets at beginning of period (5,882) (6,127)
Impairment loss (reversal of impairment loss) recognised in profit or loss 7,571 5,049
Write-off 0 0
Financial assets at end of period (8,501) (5,882)
Stage 2 | Impairment | Individual Borrowers | Cure to Stage 1 | Expected Credit Losses    
Disclosure of detailed information about borrowings [line items]    
Increase (decrease) through transfers, financial assets (2,617) (1,809)
Stage 2 | Impairment | Individual Borrowers | Transfer from Stage 1 | Expected Credit Losses    
Disclosure of detailed information about borrowings [line items]    
Increase (decrease) through transfers, financial assets 1,420 (1,131)
Stage 2 | Impairment | Individual Borrowers | Transfer to stage 3 | Expected Credit Losses    
Disclosure of detailed information about borrowings [line items]    
Increase (decrease) through transfers, financial assets (5,460) (4,769)
Stage 2 | Impairment | Individual Borrowers | Cure from stage 3 | Expected Credit Losses    
Disclosure of detailed information about borrowings [line items]    
Increase (decrease) through transfers, financial assets 1,705 153
Stage 2 | Impairment | Corporate Borrowers | Expected Credit Losses    
Disclosure of detailed information about borrowings [line items]    
Financial assets at beginning of period (2,093) (2,561)
Impairment loss (reversal of impairment loss) recognised in profit or loss 2,275 982
Write-off 0 0
Financial assets at end of period (2,403) (2,093)
Stage 2 | Impairment | Corporate Borrowers | Cure to Stage 1 | Expected Credit Losses    
Disclosure of detailed information about borrowings [line items]    
Increase (decrease) through transfers, financial assets (634) (328)
Stage 2 | Impairment | Corporate Borrowers | Transfer from Stage 1 | Expected Credit Losses    
Disclosure of detailed information about borrowings [line items]    
Increase (decrease) through transfers, financial assets 339 (217)
Stage 2 | Impairment | Corporate Borrowers | Transfer to stage 3 | Expected Credit Losses    
Disclosure of detailed information about borrowings [line items]    
Increase (decrease) through transfers, financial assets (2,313) (1,473)
Stage 2 | Impairment | Corporate Borrowers | Cure from stage 3 | Expected Credit Losses    
Disclosure of detailed information about borrowings [line items]    
Increase (decrease) through transfers, financial assets 643 134
Stage 2 | Impairment | Foreign Loans In Latin America | Expected Credit Losses    
Disclosure of detailed information about borrowings [line items]    
Financial assets at beginning of period (1,628) (1,497)
Impairment loss (reversal of impairment loss) recognised in profit or loss 1,088 841
Write-off 0 0
Financial assets at end of period (1,529) (1,628)
Stage 2 | Impairment | Foreign Loans In Latin America | Cure to Stage 1 | Expected Credit Losses    
Disclosure of detailed information about borrowings [line items]    
Increase (decrease) through transfers, financial assets (1,077) (129)
Stage 2 | Impairment | Foreign Loans In Latin America | Transfer from Stage 1 | Expected Credit Losses    
Disclosure of detailed information about borrowings [line items]    
Increase (decrease) through transfers, financial assets 347 (223)
Stage 2 | Impairment | Foreign Loans In Latin America | Transfer to stage 3 | Expected Credit Losses    
Disclosure of detailed information about borrowings [line items]    
Increase (decrease) through transfers, financial assets (939) (928)
Stage 2 | Impairment | Foreign Loans In Latin America | Cure from stage 3 | Expected Credit Losses    
Disclosure of detailed information about borrowings [line items]    
Increase (decrease) through transfers, financial assets 482 124
Stage 3 | Impairment | Expected Credit Losses    
Disclosure of detailed information about borrowings [line items]    
Financial assets at beginning of period (28,480) (31,935)
Impairment loss (reversal of impairment loss) recognised in profit or loss 25,320 21,084
Write-off (33,300) (31,307)
Financial assets at end of period (26,085) (28,480)
Stage 3 | Impairment | Cure to Stage 1 | Expected Credit Losses    
Disclosure of detailed information about borrowings [line items]    
Increase (decrease) through transfers, financial assets (594) (56)
Stage 3 | Impairment | Transfer from Stage 1 | Expected Credit Losses    
Disclosure of detailed information about borrowings [line items]    
Increase (decrease) through transfers, financial assets 297 (65)
Stage 3 | Impairment | Transfer from Stage 2 | Expected Credit Losses    
Disclosure of detailed information about borrowings [line items]    
Increase (decrease) through transfers, financial assets 8,712 7,170
Stage 3 | Impairment | Cure to Stage 2 | Expected Credit Losses    
Disclosure of detailed information about borrowings [line items]    
Increase (decrease) through transfers, financial assets (2,830) (411)
Stage 3 | Impairment | Individual Borrowers | Expected Credit Losses    
Disclosure of detailed information about borrowings [line items]    
Financial assets at beginning of period (17,730) (18,001)
Impairment loss (reversal of impairment loss) recognised in profit or loss 18,816 19,258
Write-off (25,110) (24,156)
Financial assets at end of period (15,291) (17,730)
Stage 3 | Impairment | Individual Borrowers | Cure to Stage 1 | Expected Credit Losses    
Disclosure of detailed information about borrowings [line items]    
Increase (decrease) through transfers, financial assets (76) (7)
Stage 3 | Impairment | Individual Borrowers | Transfer from Stage 1 | Expected Credit Losses    
Disclosure of detailed information about borrowings [line items]    
Increase (decrease) through transfers, financial assets 176 (18)
Stage 3 | Impairment | Individual Borrowers | Transfer from Stage 2 | Expected Credit Losses    
Disclosure of detailed information about borrowings [line items]    
Increase (decrease) through transfers, financial assets 5,460 4,769
Stage 3 | Impairment | Individual Borrowers | Cure to Stage 2 | Expected Credit Losses    
Disclosure of detailed information about borrowings [line items]    
Increase (decrease) through transfers, financial assets (1,705) (153)
Stage 3 | Impairment | Corporate Borrowers | Expected Credit Losses    
Disclosure of detailed information about borrowings [line items]    
Financial assets at beginning of period (6,978) (10,709)
Impairment loss (reversal of impairment loss) recognised in profit or loss 4,067 543
Write-off (5,139) (5,595)
Financial assets at end of period (7,591) (6,978)
Stage 3 | Impairment | Corporate Borrowers | Cure to Stage 1 | Expected Credit Losses    
Disclosure of detailed information about borrowings [line items]    
Increase (decrease) through transfers, financial assets (30) (46)
Stage 3 | Impairment | Corporate Borrowers | Transfer from Stage 1 | Expected Credit Losses    
Disclosure of detailed information about borrowings [line items]    
Increase (decrease) through transfers, financial assets 45 (28)
Stage 3 | Impairment | Corporate Borrowers | Transfer from Stage 2 | Expected Credit Losses    
Disclosure of detailed information about borrowings [line items]    
Increase (decrease) through transfers, financial assets 2,313 1,473
Stage 3 | Impairment | Corporate Borrowers | Cure to Stage 2 | Expected Credit Losses    
Disclosure of detailed information about borrowings [line items]    
Increase (decrease) through transfers, financial assets (643) (134)
Stage 3 | Impairment | Foreign Loans In Latin America | Expected Credit Losses    
Disclosure of detailed information about borrowings [line items]    
Financial assets at beginning of period (3,772) (3,225)
Impairment loss (reversal of impairment loss) recognised in profit or loss 2,437 1,283
Write-off (3,051) (1,556)
Financial assets at end of period (3,203) (3,772)
Stage 3 | Impairment | Foreign Loans In Latin America | Cure to Stage 1 | Expected Credit Losses    
Disclosure of detailed information about borrowings [line items]    
Increase (decrease) through transfers, financial assets (488) (3)
Stage 3 | Impairment | Foreign Loans In Latin America | Transfer from Stage 1 | Expected Credit Losses    
Disclosure of detailed information about borrowings [line items]    
Increase (decrease) through transfers, financial assets 76 (19)
Stage 3 | Impairment | Foreign Loans In Latin America | Transfer from Stage 2 | Expected Credit Losses    
Disclosure of detailed information about borrowings [line items]    
Increase (decrease) through transfers, financial assets 939 928
Stage 3 | Impairment | Foreign Loans In Latin America | Cure to Stage 2 | Expected Credit Losses    
Disclosure of detailed information about borrowings [line items]    
Increase (decrease) through transfers, financial assets R$ (482) R$ (124)