XML 253 R216.htm IDEA: XBRL DOCUMENT
v3.22.1

Risk and Capital Management - Summary of Financial Assets Individually Evaluated Classified by Rating (Detail) | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2021 BRL (R$) | Dec. 31, 2020 BRL (R$) | Dec. 31, 2021 USD ($) | Dec. 31, 2020 USD ($)
Disclosure of financial assets individually evaluated classified by rating [Line Items] |  |  |  |
Other financial assets, individually evaluated, classified by rating | R$ 932,840,000,000 | R$ 1,000,949,000,000 |  |
Other financial assets, individually evaluated, classified by rating, percentage | 100.00% | 100.00% |  |
Low [Member] |  |  |  |
Disclosure of financial assets individually evaluated classified by rating [Line Items] |  |  |  |
Other financial assets, individually evaluated, classified by rating | R$ 924,209,000,000 | R$ 991,997,000,000 |  |
Medium [Member] |  |  |  |
Disclosure of financial assets individually evaluated classified by rating [Line Items] |  |  |  |
Other financial assets, individually evaluated, classified by rating | 7,618,000,000 | 6,588,000,000 |  |
High [Member] |  |  |  |
Disclosure of financial assets individually evaluated classified by rating [Line Items] |  |  |  |
Other financial assets, individually evaluated, classified by rating | 1,013,000,000 | 2,364,000,000 |  |
Interbank deposits and securities purchased under agreements to resell [Member] |  |  |  |
Disclosure of financial assets individually evaluated classified by rating [Line Items] |  |  |  |
Other financial assets, individually evaluated, classified by rating | R$ 245,460,000,000 | R$ 295,628,000,000 |  |
Other financial assets, individually evaluated, classified by rating, percentage | 26.40% | 29.50% |  |
Interbank deposits and securities purchased under agreements to resell [Member] | Low [Member] |  |  |  |
Disclosure of financial assets individually evaluated classified by rating [Line Items] |  |  |  |
Other financial assets, individually evaluated, classified by rating | R$ 245,442,000,000 | R$ 295,334,000,000 |  |
Interbank deposits and securities purchased under agreements to resell [Member] | High [Member] |  |  |  |
Disclosure of financial assets individually evaluated classified by rating [Line Items] |  |  |  |
Other financial assets, individually evaluated, classified by rating | $ |  |  | $ 18 | $ 294
Financial assets at fair value through profit or loss [member] |  |  |  |
Disclosure of financial assets individually evaluated classified by rating [Line Items] |  |  |  |
Other financial assets, individually evaluated, classified by rating | R$ 147,746,000,000 | R$ 129,804,000,000 |  |
Other financial assets, individually evaluated, classified by rating, percentage | 15.80% | 13.00% |  |
Financial assets at fair value through profit or loss [member] | Low [Member] |  |  |  |
Disclosure of financial assets individually evaluated classified by rating [Line Items] |  |  |  |
Other financial assets, individually evaluated, classified by rating | R$ 142,416,000,000 | R$ 123,553,000,000 |  |
Financial assets at fair value through profit or loss [member] | Medium [Member] |  |  |  |
Disclosure of financial assets individually evaluated classified by rating [Line Items] |  |  |  |
Other financial assets, individually evaluated, classified by rating | 4,399,000,000 | 4,396,000,000 |  |
Financial assets at fair value through profit or loss [member] | High [Member] |  |  |  |
Disclosure of financial assets individually evaluated classified by rating [Line Items] |  |  |  |
Other financial assets, individually evaluated, classified by rating | 931,000,000 | 1,855,000,000 |  |
Financial assets designated at fair value through profit or loss [member] |  |  |  |
Disclosure of financial assets individually evaluated classified by rating [Line Items] |  |  |  |
Other financial assets, individually evaluated, classified by rating | R$ 434,012,000,000 | R$ 465,575,000,000 |  |
Other financial assets, individually evaluated, classified by rating, percentage | 46.50% | 46.50% |  |
Financial assets designated at fair value through profit or loss [member] | Low [Member] |  |  |  |
Disclosure of financial assets individually evaluated classified by rating [Line Items] |  |  |  |
Other financial assets, individually evaluated, classified by rating | R$ 430,729,000,000 | R$ 463,168,000,000 |  |
Financial assets designated at fair value through profit or loss [member] | Medium [Member] |  |  |  |
Disclosure of financial assets individually evaluated classified by rating [Line Items] |  |  |  |
Other financial assets, individually evaluated, classified by rating | 3,219,000,000 | 2,192,000,000 |  |
Financial assets designated at fair value through profit or loss [member] | High [Member] |  |  |  |
Disclosure of financial assets individually evaluated classified by rating [Line Items] |  |  |  |
Other financial assets, individually evaluated, classified by rating | 64,000,000 | 215,000,000 |  |
Available-for-sale financial assets [Member] |  |  |  |
Disclosure of financial assets individually evaluated classified by rating [Line Items] |  |  |  |
Other financial assets, individually evaluated, classified by rating | R$ 105,622,000,000 | R$ 109,942,000,000 |  |
Other financial assets, individually evaluated, classified by rating, percentage | 11.30% | 11.00% |  |
Available-for-sale financial assets [Member] | Low [Member] |  |  |  |
Disclosure of financial assets individually evaluated classified by rating [Line Items] |  |  |  |
Other financial assets, individually evaluated, classified by rating | R$ 105,622,000,000 | R$ 109,942,000,000 |  |

X
- Definition Disclosure of financial assets individually evaluated classified by rating. + References No definition available. + Details
Name: | itub_DisclosureOfFinancialAssetsIndividuallyEvaluatedClassifiedByRatingLineItems
Namespace Prefix: | itub_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Maximum exposure of other financial assets. + References No definition available. + Details
Name: | itub_MaximumExposureOfOtherFinancialAssets
Namespace Prefix: | itub_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Percentage of maximum exposure of other financial assets. + References No definition available. + Details
Name: | itub_PercentageOfMaximumExposureOfOtherFinancialAssets
Namespace Prefix: | itub_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | ifrs-full_InternalCreditGradesAxis=itub_LowerRiskMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_InternalCreditGradesAxis=itub_SatisfactoryRiskMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_InternalCreditGradesAxis=itub_HigherRiskMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_CategoriesOfFinancialAssetsAxis=itub_InterbankDepositsAndSecuritiesPurchasedUnderAgreementsToResellMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_CategoriesOfFinancialAssetsAxis=itub_FinancialAssetsAtFairValueThroughProfitOrLossMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_CategoriesOfFinancialAssetsAxis=ifrs-full_FinancialAssetsAtFairValueThroughProfitOrLossCategoryMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_CategoriesOfFinancialAssetsAxis=ifrs-full_FinancialAssetsAvailableforsaleCategoryMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |