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Obligations for pension and similar liabilities (Details 3) - BRL (R$) R$ in Thousands | 12 Months Ended
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Dec. 31, 2025 | Dec. 31, 2024 | Dec. 31, 2023
Post Employment Plans [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Fair value of plan assets at the beginning of the year | R$ 26,158,640 | R$ 27,328,362 | R$ 27,316,715
Interest Income (Expenses) | 2,645,046 | 2,363,706 | 2,386,330
Remeasurement Real gain loss on actuarial assets excluding interest expenses net | (1,338,149) | (1,200,878) | (99,752)
Contributions | 646,952 | 2,388,681 | 212,719
By the Bank | 644,411 | 2,386,461 | 210,367
By plan participants | 2,541 | 2,220 | 2,352
Other Similar Obligations, Benefits paid | (2,822,774) | (4,721,231) | (2,487,650)
Fair value of plan assets at the end of the year | 25,289,715 | 26,158,640 | 27,328,362
Other Similar Obligations [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Fair value of plan assets at the beginning of the year | 5,008,751 | 5,570,354 | 4,945,407
Interest Income (Expenses) | 528,476 | 491,611 | 471,759
Remeasurement Real gain loss on actuarial assets excluding interest expenses net | 37,761 | (772,305) | 387,599
Contributions | 182,652 | 177,614 | 173,335
By the Bank | 182,652 | 177,614 |
Other Similar Obligations, Benefits paid | (503,933) | (458,523) | (407,746)
Fair value of plan assets at the end of the year | R$ 5,253,707 | R$ 5,008,751 | R$ 5,570,354

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- Definition The decrease (increase) in net defined benefit liability (asset) resulting from contributions to a defined benefit plan by the employer. [Refer: Net defined benefit liability (asset); Defined benefit plans [domain]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 19 -IssueDate 2024-01-01 -Paragraph 141 -Subparagraph f -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=19&code=ifrs-tx-2024-en-r&anchor=para_141_f&doctype=Standard -URIDate 2024-03-27 + Details
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- Definition The decrease (increase) in the net defined benefit liability (asset) resulting from contributions to a defined benefit plan by plan participants. [Refer: Net defined benefit liability (asset); Defined benefit plans [domain]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 19 -IssueDate 2024-01-01 -Paragraph 141 -Subparagraph f -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=19&code=ifrs-tx-2024-en-r&anchor=para_141_f&doctype=Standard -URIDate 2024-03-27 + Details
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- Definition The decrease (increase) in the net defined benefit liability (asset) resulting from contributions to a defined benefit plan. [Refer: Net defined benefit liability (asset); Defined benefit plans [domain]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 19 -IssueDate 2024-01-01 -Paragraph 141 -Subparagraph f -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=19&code=ifrs-tx-2024-en-r&anchor=para_141_f&doctype=Standard -URIDate 2024-03-27 + Details
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- Definition The increase (decrease) in reimbursement rights related to defined benefit obligation, resulting from the remeasurement of reimbursement rights. [Refer: Reimbursement rights related to defined benefit obligation, at fair value] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 19 -IssueDate 2024-01-01 -Paragraph 141 -Subparagraph c -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=19&code=ifrs-tx-2024-en-r&anchor=para_141_c&doctype=Standard -URIDate 2024-03-27 + Details
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- Definition The increase (decrease) in reimbursement rights related to defined benefit obligation, resulting from income arising from interest on reimbursement rights. [Refer: Interest income; Reimbursement rights related to defined benefit obligation, at fair value] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 19 -IssueDate 2024-01-01 -Paragraph 141 -Subparagraph b -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=19&code=ifrs-tx-2024-en-r&anchor=para_141_b&doctype=Standard -URIDate 2024-03-27 + Details
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- Definition The decrease (increase) in reimbursement rights related to defined benefit obligation, resulting from payments in respect of settlements. [Refer: Decrease (increase) in net defined benefit liability (asset) resulting from gains (losses) arising from settlements; Defined benefit plans [domain]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 19 -IssueDate 2024-01-01 -Paragraph 141 -Subparagraph g -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=19&code=ifrs-tx-2024-en-r&anchor=para_141_g&doctype=Standard -URIDate 2024-03-27 + Details
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- Definition The fair value of defined benefit plan assets. Plan assets comprise assets held by a long-term employee benefit fund and qualifying insurance policies. [Refer: At fair value [member]] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 19 -IssueDate 2024-01-01 -Paragraph 57 -Subparagraph a -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=19&code=ifrs-tx-2024-en-r&anchor=para_57_a&doctype=Standard -URIDate 2024-03-27 + Details
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