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Material accounting policies (Details) | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023
Country of domicile [member] | Banco Itau B B A [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Incorporation country | Brazil |
Activity | Financial institution |
Interest in voting capital |  | 100.00%
Interest in total capital |  | 100.00%
Country of domicile [member] | Banco Itau Consignado S.A. [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Incorporation country | Brazil |
Activity | Financial institution |
Interest in voting capital | 100.00% | 100.00%
Interest in total capital | 100.00% | 100.00%
Country of domicile [member] | Banco Itaucard S.A [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Incorporation country | Brazil |
Activity | Financial institution |
Interest in voting capital | 100.00% | 100.00%
Interest in total capital | 100.00% | 100.00%
Country of domicile [member] | Cia. Itau de Capitalizacao [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Incorporation country | Brazil |
Activity | Premium Bonds |
Interest in voting capital | 100.00% | 100.00%
Interest in total capital | 100.00% | 100.00%
Country of domicile [member] | Dibens Leasing S.A. - Arrendamento Mercantil [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Incorporation country | Brazil |
Activity | Leasing |
Interest in voting capital | 100.00% | 100.00%
Interest in total capital | 100.00% | 100.00%
Country of domicile [member] | Financeira Itau CBD S.A. Credito, Financiamento e Investimento [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Incorporation country | Brazil |
Activity | Consumer finance credit |
Interest in voting capital | 50.00% | 50.00%
Interest in total capital | 50.00% | 50.00%
Country of domicile [member] | Hipercard Banco Multiplo S.A. [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Incorporation country | Brazil |
Activity | Financial institution |
Interest in voting capital | 100.00% | 100.00%
Interest in total capital | 100.00% | 100.00%
Country of domicile [member] | Itau Corretora de Valores S.A. [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Incorporation country | Brazil |
Activity | Securities Broker |
Interest in voting capital | 100.00% | 100.00%
Interest in total capital | 100.00% | 100.00%
Country of domicile [member] | Itau Seguros S.A. [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Incorporation country | Brazil |
Activity | Insurance |
Interest in voting capital | 100.00% | 100.00%
Interest in total capital | 100.00% | 100.00%
Country of domicile [member] | Itau Unibanco SA [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Incorporation country | Brazil |
Activity | Financial institution |
Interest in voting capital | 100.00% | 100.00%
Interest in total capital | 100.00% | 100.00%
Country of domicile [member] | Itau Vida e Previdencia S.A. [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Incorporation country | Brazil |
Activity | Pension plan |
Interest in voting capital | 100.00% | 100.00%
Interest in total capital | 100.00% | 100.00%
Country of domicile [member] | Luizacred S.A. Sociedade de Credito, Financiamento e Investimento [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Incorporation country | Brazil |
Activity | Consumer finance credit |
Interest in voting capital | 50.00% | 50.00%
Interest in total capital | 50.00% | 50.00%
Country of domicile [member] | Redecard Instituio de Pagamento S.A. [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Incorporation country | Brazil |
Activity | Acquirer |
Interest in voting capital | 100.00% | 100.00%
Interest in total capital | 100.00% | 100.00%
Foreign countries [member] | Itau Corpbanca Colombia S.A. [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Incorporation country | Colombia |
Activity | Financial institution |
Interest in voting capital | 67.06% | 67.06%
Interest in total capital | 67.06% | 67.06%
Functional currency | Colombian peso |
Foreign countries [member] | Banco Itau (Suisse) SA [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Incorporation country | Switzerland |
Activity | Financial institution |
Interest in voting capital | 100.00% | 100.00%
Interest in total capital | 100.00% | 100.00%
Functional currency | Swiss franc |
Foreign countries [member] | Banco Itau Paraguay S.A. [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Incorporation country | Paraguay |
Activity | Financial institution |
Interest in voting capital | 100.00% | 100.00%
Interest in total capital | 100.00% | 100.00%
Functional currency | Guarani |
Foreign countries [member] | Banco Itau Uruguay S.A. [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Incorporation country | Uruguay |
Activity | Financial institution |
Interest in voting capital | 100.00% | 100.00%
Interest in total capital | 100.00% | 100.00%
Functional currency | Uruguayan peso |
Foreign countries [member] | Itau Bank, Ltd. [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Incorporation country | Cayman Islands |
Activity | Financial institution |
Interest in voting capital | 100.00% | 100.00%
Interest in total capital | 100.00% | 100.00%
Functional currency | Real |
Foreign countries [member] | Itau BBA International plc [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Incorporation country | United Kingdom |
Activity | Financial institution |
Interest in voting capital | 100.00% | 100.00%
Interest in total capital | 100.00% | 100.00%
Functional currency | US Dollar |
Foreign countries [member] | Itau BBA USA Securities Inc. [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Incorporation country | United States |
Activity | Securities Broker |
Interest in voting capital | 100.00% | 100.00%
Interest in total capital | 100.00% | 100.00%
Functional currency | US Dollar |
Foreign countries [member] | Itau Corpbanca [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Incorporation country | Chile |
Activity | Financial institution |
Interest in voting capital | 67.42% | 67.42%
Interest in total capital | 67.42% | 67.42%
Functional currency | Chilean peso |

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