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Related party transactions (Details 2) - BRL (R$) R$ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2025 | Dec. 31, 2024
IfrsStatementLineItems [Line Items] |  |
Assets | R$ 44,438,896 | R$ 46,464,248
Derivatives Measured At Fair Value Through Profit Or Loss, Net | 3,933,982 | (333,181)
Debt Instruments |  | 67,071
Loans and other amounts with credit institutions - Availability and Applications in Foreign Currency (Overnight Applications) | 11,022,259 | 18,899,972
Loans and other values with customers | 28,861,596 | 27,607,543
Other Assets | 592,992 | 200,372
Warranties and Limits | 28,067 | 22,471
Liabilities | (16,187,760) | (11,345,866)
Deposits from credit institutions | (4,659,780) | (608,137)
Securities |  | (558,904)
Customer deposits | (2,695,611) | (1,975,864)
Other financial liabilities - Dividends and interest on equity payable | (8,276,479) | (7,268,606)
Other Liabilities | (555,890) | (934,355)
Debt Instruments Eligible for Capital |  |
Income | 2,223,297 | (1,645,339)
Interest and similar income - Loans and amounts due from credit institutions | 198,597 | 315,152
Warranties and Limits | 25 | 25
Interest expense and similar charges | (785,542) | (1,440,614)
Fee and commission income (expense) | 1,605,387 | 2,386,305
Gains (losses) on financial assets and liabilities and exchange differences (net) | 2,220,253 | (2,158,895)
Other operating income (expenses) | 331,975 | 326,301
Administrative expenses and amortization | (1,347,398) | (913,664)
Profit from disposal of assets not classified as non-current assets held for sale |  | (159,949)
Parent [member] |  |
IfrsStatementLineItems [Line Items] |  |
Assets | 14,794,190 | 18,182,830
Derivatives Measured At Fair Value Through Profit Or Loss, Net | 3,927,271 | (333,181)
Debt Instruments |  |
Loans and other amounts with credit institutions - Availability and Applications in Foreign Currency (Overnight Applications) | 10,865,422 | 18,514,514
Loans and other values with customers |  |
Other Assets | 1,497 | 1,497
Warranties and Limits |  |
Liabilities | (3,932,658) | (304,650)
Deposits from credit institutions | (3,909,005) | (11,181)
Securities |  |
Customer deposits |  |
Other financial liabilities - Dividends and interest on equity payable | (181) |
Other Liabilities | (23,472) | (293,469)
Debt Instruments Eligible for Capital |  |
Income | 2,029,355 | (2,790,659)
Interest and similar income - Loans and amounts due from credit institutions | 189,556 | 268,957
Warranties and Limits |  |
Interest expense and similar charges | (81,444) | (625,820)
Fee and commission income (expense) | (900) | (5,344)
Gains (losses) on financial assets and liabilities and exchange differences (net) | 2,219,950 | (2,157,771)
Other operating income (expenses) |  |
Administrative expenses and amortization | (297,807) | (270,681)
Profit from disposal of assets not classified as non-current assets held for sale |  |
Joint Controlled Companies And Other Related Party [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Assets | 29,515,608 | 28,222,527
Derivatives Measured At Fair Value Through Profit Or Loss, Net |  |
Debt Instruments |  | 67,071
Loans and other amounts with credit institutions - Availability and Applications in Foreign Currency (Overnight Applications) | 156,837 | 385,458
Loans and other values with customers | 28,767,276 | 27,571,123
Other Assets | 591,495 | 198,875
Warranties and Limits |  |
Liabilities | (12,442,585) | (10,423,148)
Deposits from credit institutions | (750,775) | (596,956)
Securities |  | (519,000)
Customer deposits | (2,623,152) | (1,946,618)
Other financial liabilities - Dividends and interest on equity payable | (8,276,298) | (7,268,606)
Other Liabilities | (792,360) | (91,968)
Debt Instruments Eligible for Capital |  |
Income | 614,997 | 1,810,374
Interest and similar income - Loans and amounts due from credit institutions | 1,763 | 45,881
Warranties and Limits |  |
Interest expense and similar charges | (275,437) | (149,293)
Fee and commission income (expense) | 1,606,287 | 2,391,649
Gains (losses) on financial assets and liabilities and exchange differences (net) |  | (1,232)
Other operating income (expenses) | 331,975 | 326,301
Administrative expenses and amortization | (1,049,591) | (642,983)
Profit from disposal of assets not classified as non-current assets held for sale |  | (159,949)
Subsidiaries Key Management Personnel [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Assets | 129,098 | 58,891
Derivatives Measured At Fair Value Through Profit Or Loss, Net | 6,711 |
Debt Instruments |  |
Loans and other amounts with credit institutions - Availability and Applications in Foreign Currency (Overnight Applications) |  |
Loans and other values with customers | 94,320 | 36,420
Other Assets |  |
Warranties and Limits | 28,067 | 22,471
Liabilities | 187,483 | (618,068)
Deposits from credit institutions |  |
Securities |  | (39,904)
Customer deposits | (72,459) | (29,246)
Other financial liabilities - Dividends and interest on equity payable |  |
Other Liabilities | 259,942 | (548,918)
Debt Instruments Eligible for Capital |  |
Income | (421,055) | (665,054)
Interest and similar income - Loans and amounts due from credit institutions | 7,278 | 314
Warranties and Limits | 25 | 25
Interest expense and similar charges | (428,661) | (665,501)
Fee and commission income (expense) |  |
Gains (losses) on financial assets and liabilities and exchange differences (net) | 303 | 108
Other operating income (expenses) |  |
Administrative expenses and amortization |  |
Profit from disposal of assets not classified as non-current assets held for sale |  |

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