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v3.23.1

Commissions and banking fees (Details) - BRL (R$) R$ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Commissions And Banking Fees |  |  |
Credit and debit cards | R$ (19,989) | R$ (16,051) | R$ (13,813)
Current account services | (7,528) | (7,803) | (8,002)
Asset management | 7,684 | 7,177 | 6,951
Funds | (6,764) | (6,545) | (6,316)
Consortia | (920) | (632) | (635)
Credit operations and financial guarantees provided | (2,539) | (2,511) | (2,298)
Credit operations | (1,185) | (1,307) | (964)
Financial guarantees provided | (1,354) | (1,204) | (1,334)
Collection services | (1,971) | (2,020) | (1,897)
Advisory services and brokerage | (3,348) | (3,579) | (2,891)
Custody services | (617) | (605) | (573)
Other | (2,702) | (2,578) | (2,132)
Total | R$ 46,378 | R$ 42,324 | R$ 38,557

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- Definition Asset management fees consortia income. + References No definition available. + Details
Name: | itub_AssetManagementFeesConsortiaIncome
Namespace Prefix: | itub_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Asset management fees funds income. + References No definition available. + Details
Name: | itub_AssetManagementFeesFundsIncome
Namespace Prefix: | itub_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Asset management fees income. + References No definition available. + Details
Name: | itub_AssetManagementFeesIncome
Namespace Prefix: | itub_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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

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

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

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- Definition Current account services. + References No definition available. + Details
Name: | itub_CurrentAccountServices
Namespace Prefix: | itub_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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

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- References No definition available. + Details
Name: | itub_DisclosureCommissionsAndBankingFeesAbstract
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Balance Type: | na
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- Definition Fees for credit lines. + References No definition available. + Details
Name: | itub_FeesForCreditLines
Namespace Prefix: | itub_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Fees for financial guarantees Issued. + References No definition available. + Details
Name: | itub_FeesForFinancialGuaranteesIssued
Namespace Prefix: | itub_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Fees for guarantees issued and credit lines. + References No definition available. + Details
Name: | itub_FeesForGuaranteesIssuedAndCreditLines
Namespace Prefix: | itub_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Fees from credit and debit card services. + References No definition available. + Details
Name: | itub_FeesFromCreditAndDebitCardServices
Namespace Prefix: | itub_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Other banking services. + References No definition available. + Details
Name: | itub_OtherBankingServices
Namespace Prefix: | itub_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration