XML 198 R166.htm IDEA: XBRL DOCUMENT
v3.23.1

Insurance contracts and private pension (Details 5) - BRL (R$) R$ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2022 | Dec. 31, 2021
IfrsStatementLineItems [Line Items] |  |
(-) IBNER | R$ 371 | R$ 361
Claims Development [member] |  |
IfrsStatementLineItems [Line Items] |  |
Provision for unsettled claims (PSL) | 577 |
(-) IBNER | 213 |
(-) Reinsurance | 12 |
Retrocession and other estimates | (7) |
Liability claims presented in the development table (a + b) | R$ 359 |

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- Definition The amount of liability for insured events that have occurred but for which claims have yet not been reported by policyholders. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Note Expiry date 2023-01-01 -Name IFRS -Number 4 -IssueDate 2022-03-24 -Paragraph 37 -Subparagraph b -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=4&code=ifrs-tx-2022-en-b&anchor=para_37_b&doctype=Standard&book=b -URIDate 2022-03-24 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Note Expiry date 2023-01-01 -Name IFRS -Number 4 -IssueDate 2022-03-24 -Paragraph IG22 -Subparagraph c -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=4&code=ifrs-tx-2022-en-b&anchor=para_IG22_c&doctype=Implementation%20Guidance&book=b -URIDate 2022-03-24 + Details
Name: | ifrs-full_ClaimsIncurredButNotReported
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Gross reinsurance liability claims presented in the development. + References No definition available. + Details
Name: | itub_GrossReinsuranceLiabilityClaimsPresentedInTheDevelopment
Namespace Prefix: | itub_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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

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- Definition Net reinsurance Amount + References No definition available. + Details
Name: | itub_NetReinsuranceAmount
Namespace Prefix: | itub_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition Net Reinsurance Retrocession And Other Estimates + References No definition available. + Details
Name: | itub_NetReinsuranceRetrocessionAndOtherEstimates
Namespace Prefix: | itub_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Provision for unsettled claims + References No definition available. + Details
Name: | itub_ProvisionForUnsettledClaims
Namespace Prefix: | itub_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Details
Name: | ifrs-full_TypesOfInsuranceContractsAxis=itub_ClaimsDevelopmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |