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Business segment reporting (Details) - BRL (R$) R$ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2025 | Dec. 31, 2024 | Dec. 31, 2023
IfrsStatementLineItems [Line Items] |  |  |
NET INTEREST INCOME | R$ 57,634,318 | R$ 56,678,560 | R$ 46,884,034
Equity instrument income | 85,528 | 83,647 | 22,179
Income from companies accounted for by the equity method | 458,313 | 312,986 | 239,236
Net fee and commission income | 17,495,456 | 17,205,209 | 15,639,965
Gains (losses) on financial assets and liabilities (net) and Exchange differences (net) (1) | 131,263 | 129,005 | 3,794,686
Other operating expense (net) | (808,321) | (652,121) | (715,790)
TOTAL INCOME | 74,996,557 | 73,757,286 | 65,864,310
Personnel expenses | (11,699,346) | (11,597,996) | (10,813,926)
Other administrative expenses | 9,239,092 | (8,818,508) | (8,748,715)
Depreciation and amortization | (2,625,783) | (2,731,018) | (2,740,950)
Provisions (net) | (4,978,678) | (4,595,238) | (4,424,412)
Impairment losses on financial assets (net) | (29,539,862) | (28,484,030) | (28,008,086)
Impairment losses on non-financial assets (net) | (396,946) | (252,487) | (250,173)
Other non-financial gains (losses) | 212,144 | 1,912,219 | 1,043,603
OPERATING PROFIT BEFORE TAX (1) | 16,728,994 | 19,190,228 | 11,921,651
Currency Hedge(1) | (363,712) | 664,616 | (163,165)
ADJUSTED OPERATING INCOME BEFORE TAX (1) | 16,365,282 | 19,854,844 | 11,758,486
Condensed Income Statement Commercial Banking [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
NET INTEREST INCOME | 53,125,730 | 51,563,173 | 44,651,967
Equity instrument income | 7,579 | 5,109 | 3,514
Income from companies accounted for by the equity method | 373,830 | 259,321 | 184,889
Net fee and commission income | 15,396,640 | 14,943,536 | 13,269,837
Gains (losses) on financial assets and liabilities (net) and Exchange differences (net) (1) | (4,206,481) | (1,487,662) | (1,125,430)
Other operating expense (net) | (703,532) | (479,848) | (595,993)
TOTAL INCOME | 63,993,766 | 64,803,629 | 56,388,784
Personnel expenses | (10,568,513) | (10,534,033) | (9,753,972)
Other administrative expenses | 8,208,448 | (7,835,919) | (7,866,949)
Depreciation and amortization | (2,466,865) | (2,599,134) | (2,621,353)
Provisions (net) | (4,894,082) | (4,582,750) | (4,404,408)
Impairment losses on financial assets (net) | (28,817,676) | (28,450,756) | (26,582,759)
Impairment losses on non-financial assets (net) | (312,712) | (252,550) | (250,044)
Other non-financial gains (losses) | 212,144 | 1,912,219 | 1,043,603
OPERATING PROFIT BEFORE TAX (1) | 8,937,614 | 12,460,706 | 5,952,902
Currency Hedge(1) | (363,712) | 664,616 | (163,165)
ADJUSTED OPERATING INCOME BEFORE TAX (1) | 8,573,902 | 13,125,322 | 5,789,737
Condensed Income Statement Global Wholesale Banking [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
NET INTEREST INCOME | 4,508,588 | 5,115,387 | 2,232,067
Equity instrument income | 77,949 | 78,538 | 18,665
Income from companies accounted for by the equity method | 84,483 | 53,665 | 54,347
Net fee and commission income | 2,098,816 | 2,261,673 | 2,370,128
Gains (losses) on financial assets and liabilities (net) and Exchange differences (net) (1) | 4,337,744 | 1,616,667 | 4,920,116
Other operating expense (net) | (104,789) | (172,273) | (119,797)
TOTAL INCOME | 11,002,791 | 8,953,657 | 9,475,526
Personnel expenses | (1,130,833) | (1,063,963) | (1,059,954)
Other administrative expenses | 1,030,644 | (982,589) | (881,766)
Depreciation and amortization | (158,918) | (131,884) | (119,597)
Provisions (net) | (84,596) | (12,488) | (20,004)
Impairment losses on financial assets (net) | (722,186) | (33,274) | (1,425,327)
Impairment losses on non-financial assets (net) | (84,234) | 63 | (129)
Other non-financial gains (losses) |  |  |
OPERATING PROFIT BEFORE TAX (1) | 7,791,380 | 6,729,522 | 5,968,749
Currency Hedge(1) |  |  |
ADJUSTED OPERATING INCOME BEFORE TAX (1) | R$ 7,791,380 | R$ 6,729,522 | R$ 5,968,749

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