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v3.23.1

Related parties (Details Narrative) - BRL (R$) R$ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2022 | Dec. 31, 2020 | Dec. 31, 2021
Related Parties |  |  |
Assets | R$ 162 | R$ 20 | R$ 100
Liability | 6,427 |  | R$ 6,136
Expense | R$ 16 | R$ 58 |

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

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- Definition Related party transactions assets. + References No definition available. + Details
Name: | itub_RelatedPartyTransactionsAssets
Namespace Prefix: | itub_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition Related party transactions expense. + References No definition available. + Details
Name: | itub_RelatedPartyTransactionsExpense
Namespace Prefix: | itub_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Related party transactions liability. + References No definition available. + Details
Name: | itub_RelatedPartyTransactionsLiability
Namespace Prefix: | itub_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant