XML 112 R181.htm IDEA: XBRL DOCUMENT
v3.20.1

Insurance Contracts and Private Pension - Summary of Claims Development (Detail) - BRL (R$) R$ in Millions | 12 Months Ended |  |  |  |
--- | --- | --- | --- | --- | ---
Dec. 31, 2018 | Dec. 31, 2019 | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Disclosure of Reinsurance Transactions [Line Items] |  |  |  |  |
(-) IBNER | R$ 373 | R$ 299 |  |  |
Claims development [member] |  |  |  |  |
Disclosure of Reinsurance Transactions [Line Items] |  |  |  |  |
Provision for unsettled claims (PSL) (*) | 618 |  |  |  |
(-) IBNER | 258 |  |  |  |
(-) Reinsurance | 37 |  |  |  |
Retrocession and other estimates | (17) |  |  |  |
Liability claims presented in the development table (a + b) | 340 |  |  |  |
Administratives claims [member] | Net Reinsurance [Member] |  |  |  |  |
Disclosure of Reinsurance Transactions [Line Items] |  |  |  |  |
At the end of reporting period | 993 | 1,149 | R$ 934 | R$ 938 | R$ 1,009
Accumulated payments through base date | 994 | 1,028 | 961 | 1,061 | 1,075
Accumulated payments through base date to current date |  | 5,119 |  |  |
Liabilities recognized in the balance sheet | 18 | 121 | 14 | 17 | 10
Accumulated liabilities recognized in the balance sheet |  | 180 |  |  |
Liabilities in relation to prior periods |  | 17 |  |  |
Total administratives claims |  | 197 |  |  |
Administratives claims [member] | Net Reinsurance [Member] | Up to one year [member] |  |  |  |  |
Disclosure of Reinsurance Transactions [Line Items] |  |  |  |  |
At the end of reporting period | 1,012 |  | 977 | 981 | 1,054
Administratives claims [member] | Net Reinsurance [Member] | Later than one year and not later than two years [member] |  |  |  |  |
Disclosure of Reinsurance Transactions [Line Items] |  |  |  |  |
At the end of reporting period |  |  | 975 | 1,001 | 1,082
Administratives claims [member] | Net Reinsurance [Member] | Later than two years and not later than three years [member] |  |  |  |  |
Disclosure of Reinsurance Transactions [Line Items] |  |  |  |  |
At the end of reporting period |  |  |  | 1,078 | 1,091
Administratives claims [member] | Net Reinsurance [Member] | Later than four years and not later than five years [member] |  |  |  |  |
Disclosure of Reinsurance Transactions [Line Items] |  |  |  |  |
At the end of reporting period |  |  |  |  | 1,084
Administratives claims [member] | Net Reinsurance [Member] | Over 5 years [member] |  |  |  |  |
Disclosure of Reinsurance Transactions [Line Items] |  |  |  |  |
At the end of reporting period | 1,012 | 1,149 | 975 | 1,078 | 1,084
Judicial claims [member] | Net Reinsurance [Member] |  |  |  |  |
Disclosure of Reinsurance Transactions [Line Items] |  |  |  |  |
At the end of reporting period | 16 | 20 | 28 | 26 | 30
Accumulated payments through base date | 27 | 14 | 44 | 44 | 61
Accumulated payments through base date to current date |  | 190 |  |  |
Liabilities recognized in the balance sheet | 7 | 6 | 8 | 11 | 10
Accumulated liabilities recognized in the balance sheet |  | 42 |  |  |
Liabilities in relation to prior periods |  | 101 |  |  |
Total administratives claims |  | 143 |  |  |
Judicial claims [member] | Net Reinsurance [Member] | Up to one year [member] |  |  |  |  |
Disclosure of Reinsurance Transactions [Line Items] |  |  |  |  |
At the end of reporting period | 33 |  | 40 | 35 | 41
Judicial claims [member] | Net Reinsurance [Member] | Later than one year and not later than two years [member] |  |  |  |  |
Disclosure of Reinsurance Transactions [Line Items] |  |  |  |  |
At the end of reporting period |  |  | 51 | 43 | 52
Judicial claims [member] | Net Reinsurance [Member] | Later than two years and not later than three years [member] |  |  |  |  |
Disclosure of Reinsurance Transactions [Line Items] |  |  |  |  |
At the end of reporting period |  |  |  | 55 | 64
Judicial claims [member] | Net Reinsurance [Member] | Later than four years and not later than five years [member] |  |  |  |  |
Disclosure of Reinsurance Transactions [Line Items] |  |  |  |  |
At the end of reporting period |  |  |  |  | 71
Judicial claims [member] | Net Reinsurance [Member] | Over 5 years [member] |  |  |  |  |
Disclosure of Reinsurance Transactions [Line Items] |  |  |  |  |
Current estimate | R$ 33 | R$ 20 | R$ 51 | R$ 55 | R$ 71

X
- 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 2021-01-01 -Name IFRS -Number 4 -IssueDate 2019-01-01 -Paragraph IG22 -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=4&code=ifrs-tx-2019-en-b&anchor=para_IG22_c&doctype=Implementation%20Guidance&book=b -URIDate 2019-03-27 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Note Expiry date 2021-01-01 -Name IFRS -Number 4 -IssueDate 2019-01-01 -Paragraph 37 -Subparagraph b -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=4&code=ifrs-tx-2019-en-b&anchor=para_37_b&doctype=Standard&book=b -URIDate 2019-03-27 + Details
Name: | ifrs-full_ClaimsIncurredButNotReported
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Accumulated reinsurance liabilities recognized in balance sheet. + References No definition available. + Details
Name: | itub_AccumulatedReinsuranceLiabilitiesRecognizedInBalanceSheet
Namespace Prefix: | itub_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Disclosure of reinsurance transactions. + References No definition available. + Details
Name: | itub_DisclosureOfReinsuranceTransactionsLineItems
Namespace Prefix: | itub_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Gross re insurance accumulated paymentsfrom base dateto current date. + References No definition available. + Details
Name: | itub_GrossReinsuranceAccumulatedPaymentsFromBaseDatetoCurrentDate
Namespace Prefix: | itub_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Gross reinsurance accumulated payments through base date. + References No definition available. + Details
Name: | itub_GrossReinsuranceAccumulatedPaymentsThroughBaseDate
Namespace Prefix: | itub_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Gross reinsurance liabilities recognized in balance sheet. + References No definition available. + Details
Name: | itub_GrossReinsuranceLiabilitiesRecognizedInBalanceSheet
Namespace Prefix: | itub_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- 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

X
- 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

X
- Definition Net Reinsurance Current Estimate + References No definition available. + Details
Name: | itub_NetReinsuranceCurrentEstimate
Namespace Prefix: | itub_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Net Reinsurance Liabilities Relation To Prior Years + References No definition available. + Details
Name: | itub_NetReinsuranceLiabilitiesRelationToPriorYears
Namespace Prefix: | itub_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Net Reinsurance Liability Claims Presented In The Development + References No definition available. + Details
Name: | itub_NetReinsuranceLiabilityClaimsPresentedInTheDevelopment
Namespace Prefix: | itub_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Net Reinsurance Reporting Period + References No definition available. + Details
Name: | itub_NetReinsuranceReportingPeriod
Namespace Prefix: | itub_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- 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

X
- 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

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

X
- Details
Name: | ifrs-full_AmountsArisingFromInsuranceContractsAxis=itub_AdministrativesClaimsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

X
- Details
Name: | ifrs-full_MaturityAxis=ifrs-full_NotLaterThanOneYearMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_MaturityAxis=ifrs-full_LaterThanOneYearAndNotLaterThanTwoYearsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_MaturityAxis=ifrs-full_LaterThanTwoYearsAndNotLaterThanThreeYearsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_MaturityAxis=ifrs-full_LaterThanFourYearsAndNotLaterThanFiveYearsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_MaturityAxis=ifrs-full_LaterThanFiveYearsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_AmountsArisingFromInsuranceContractsAxis=itub_JudicialClaimsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |