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v3.25.1

Risk and Capital Management (Details) - Financial Assets At Amortised Cost And At Fair Value Through Other Comprehensive Income Member [Member] - BRL (R$) R$ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023
IfrsStatementLineItems [Line Items] |  |
Financial assets at amortized cost | R$ 1,464,464 | R$ 1,302,826
Expected Loss | (52,936) | (51,884)
Pessimistic Scenario [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Reduction/(Increase) of Expected Loss | (2,183) | (2,298)
Base Case Scenario [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Reduction/(Increase) of Expected Loss | 538 | 422
Optimistic Scenario [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Reduction/(Increase) of Expected Loss | R$ 1,347 | R$ 1,090

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- References No definition available. + Details
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Namespace Prefix: | itub_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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Namespace Prefix: | itub_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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Namespace Prefix: | itub_
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Name: | ifrs-full_CounterpartiesAxis=itub_PessimisticScenarioMember
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Name: | ifrs-full_CounterpartiesAxis=itub_BaseCaseScenarioMember
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- Details
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