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v3.23.1

Taxes (Details Narrative) - BRL (R$) R$ in Millions | Dec. 31, 2022 | Dec. 31, 2021
--- | --- | ---
Taxes |  |
Unrecorded deferred tax assets | R$ 642 | R$ 1,909

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- References No definition available. + Details
Name: | itub_TaxesAbstract
Namespace Prefix: | itub_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Unrecognized deferred tax assets. + References No definition available. + Details
Name: | itub_UnrecognizedDeferredTaxAssets
Namespace Prefix: | itub_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant