XML 129 R77.htm IDEA: XBRL DOCUMENT
v3.19.1

Business Development - Additional Information (Detail) - BRL (R$) R$ in Millions |  |  | 12 Months Ended |  |  |
--- | --- | --- | --- | --- | --- | ---
May 11, 2017 | Oct. 08, 2016 | Dec. 31, 2022 | Dec. 31, 2018 | Oct. 12, 2018 | Sep. 14, 2017 | Jan. 21, 2016
Disclosure of business development [Line Items] |  |  |  |  |  |  |
Total provision for acquision | R$ 6,650.0 |  |  |  |  |  |
Investment in associates |  | R$ 628.0 |  |  |  |  |
TECBAN [Member] |  |  |  |  |  |  |
Disclosure of business development [Line Items] |  |  |  |  |  |  |
Equity method investment ownership percentage |  | 5.64% |  |  |  |  |
Cibrasec [Member] |  |  |  |  |  |  |
Disclosure of business development [Line Items] |  |  |  |  |  |  |
Equity method investment ownership percentage |  | 3.60% |  |  |  |  |
Citibank [Member] |  |  |  |  |  |  |
Disclosure of business development [Line Items] |  |  |  |  |  |  |
Goodwill amount guaranteed in purchase agreements |  |  |  | R$ 631.0 |  |  |
Itau CorpBanca [Member] |  |  |  |  |  |  |
Disclosure of business development [Line Items] |  |  |  |  |  |  |
Additional interest on equity percentage |  |  |  |  | 2.08% | 0.35% |
Amount of capital |  |  |  |  | R$ 362.9 | R$ 55.6 |
Ownership percentage held |  |  |  |  | 38.14% | 36.06% |
XP Holding [Member] |  |  |  |  |  |  |
Disclosure of business development [Line Items] |  |  |  |  |  |  |
Acquisition interest on capital | 49.90% |  |  |  |  |  |
Percentage of common stock | 30.10% |  |  |  |  |  |
Capital contribution | R$ 600.0 |  |  |  |  |  |
Amount of share purchase | R$ 5,700.0 |  |  |  |  |  |
XP Holding [Member] | Scenario, Forecast [Member] | 2022 [Member] |  |  |  |  |  |  |
Disclosure of business development [Line Items] |  |  |  |  |  |  |
Ownership percentage held |  |  | 62.40% |  |  |  |
Percentage of common stock |  |  | 40.00% |  |  |  |
Gestora De Inteligencia De Credito [Member] |  |  |  |  |  |  |
Disclosure of business development [Line Items] |  |  |  |  |  |  |
Percentage of interest on capital |  |  |  |  |  |  | 20.00%

X
- Definition The fair value, at acquisition date, of the consideration transferred in a business combination. [Refer: Business combinations [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 3 -IssueDate 2017-01-01 -Paragraph B64 -Subparagraph f -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=3&date=2017-03-01&anchor=para_B64_f&doctype=Appendix&seq=2 -URIDate 2017-03-09 + Details
Name: | ifrs-full_AcquisitiondateFairValueOfTotalConsiderationTransferred
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The amount of additional goodwill recognised, except goodwill included in a disposal group that, on acquisition, meets the criteria to be classified as held for sale in accordance with IFRS 5. [Refer: Goodwill; Disposal groups classified as held for sale [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 3 -IssueDate 2017-01-01 -Paragraph B67 -Subparagraph d -Clause ii -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=3&date=2017-03-01&anchor=para_B67_d_ii&doctype=Appendix&seq=2 -URIDate 2017-03-09 + Details
Name: | ifrs-full_AdditionalRecognitionGoodwill
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The fair value, at the acquisition date, of equity interests of the acquirer transferred as consideration in a business combination. [Refer: Business combinations [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 3 -IssueDate 2017-01-01 -Paragraph B64 -Subparagraph f -Clause iv -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=3&date=2017-03-01&anchor=para_B64_f_iv&doctype=Appendix&seq=2 -URIDate 2017-03-09 + Details
Name: | ifrs-full_EquityInterestsOfAcquirer
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The amount of investments in associates. [Refer: Associates [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 27 -IssueDate 2017-01-01 -Paragraph 10 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=27&date=2017-03-01&anchor=para_10&doctype=Standard -URIDate 2017-03-09 + Details
Name: | ifrs-full_InvestmentsInAssociates
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The percentage of voting equity interests acquired in a business combination. [Refer: Business combinations [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 3 -IssueDate 2017-01-01 -Paragraph B64 -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=3&date=2017-03-01&anchor=para_B64_c&doctype=Appendix&seq=2 -URIDate 2017-03-09 + Details
Name: | ifrs-full_PercentageOfVotingEquityInterestsAcquired
Namespace Prefix: | ifrs-full_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition The proportion of ownership interest in an associate attributable to the entity. [Refer: Associates [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 27 -IssueDate 2017-01-01 -Paragraph 17 -Subparagraph b -Clause iii -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=27&date=2017-03-01&anchor=para_17_b_iii&doctype=Standard -URIDate 2017-03-09 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 27 -IssueDate 2017-01-01 -Paragraph 16 -Subparagraph b -Clause iii -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=27&date=2017-03-01&anchor=para_16_b_iii&doctype=Standard -URIDate 2017-03-09 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 12 -IssueDate 2017-01-01 -Paragraph 21 -Subparagraph a -Clause iv -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=12&date=2017-03-01&anchor=para_21_a_iv&doctype=Standard -URIDate 2017-03-09 + Details
Name: | ifrs-full_ProportionOfOwnershipInterestInAssociate
Namespace Prefix: | ifrs-full_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Acquisition interest on capital. + References No definition available. + Details
Name: | itub_AcquisitionInterestOnCapital
Namespace Prefix: | itub_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Additional Interest on equity percentage. + References No definition available. + Details
Name: | itub_AdditionalInterestOnEquityPercentage
Namespace Prefix: | itub_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Amount of shares purchased. + References No definition available. + Details
Name: | itub_AmountOfSharesPurchased
Namespace Prefix: | itub_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Line items representing the disclosure of business development. + References No definition available. + Details
Name: | itub_DisclosureOfBusinessDevelopmentLineItems
Namespace Prefix: | itub_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Equity ownership percentage. + References No definition available. + Details
Name: | itub_EquityOwnershipPercentage
Namespace Prefix: | itub_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Payments on capital contribution. + References No definition available. + Details
Name: | itub_PaymentsOnCapitalContribution
Namespace Prefix: | itub_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Percentage of common stock. + References No definition available. + Details
Name: | itub_PercentageOfCommonStock
Namespace Prefix: | itub_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | ifrs-full_SignificantInvestmentsInAssociatesAxis=itub_TecbanMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInAssociatesAxis=itub_CibrasecMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_CategoriesOfRelatedPartiesAxis=itub_CitibankMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_BusinessCombinationsAxis=itub_ItauCorpbancaMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_BusinessCombinationsAxis=itub_XpHoldingMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementScenarioAxis=us-gaap_ScenarioForecastMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

X
- Details
Name: | ifrs-full_GeographicalAreasAxis=itub_GestoraDeInteligenciaDeCreditoMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |