XML 218 R145.htm IDEA: XBRL DOCUMENT
v3.20.1

Stockholders' Equity - Summary of Non-controlling Interests (Detail) - BRL (R$) R$ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Disclosure of noncontrolling interests [Line Items] |  |  |
Non-controlling interests | R$ 12,540 | R$ 13,684 |
Net Income | 700 | 732 | R$ 32
Itau CorpBanca [Member] |  |  |
Disclosure of noncontrolling interests [Line Items] |  |  |
Non-controlling interests | 11,270 | 11,645 |
Net Income | 504 | 539 |
Itau Corpbanca Colombia S.A. [Member] |  |  |
Disclosure of noncontrolling interests [Line Items] |  |  |
Non-controlling interests | 406 | 1,268 |
Net Income | (16) | (2) |
Financeira Itau CBD S.A. Credito, Financiamento e Investimento [Member] |  |  |
Disclosure of noncontrolling interests [Line Items] |  |  |
Non-controlling interests | 446 | 364 |
Net Income | 131 | 105 |
Luizacred S A Soc Cred Financiamento Investimento [member] |  |  |
Disclosure of noncontrolling interests [Line Items] |  |  |
Non-controlling interests | 295 | 288 |
Net Income | 20 | 44 |
Others [Member] |  |  |
Disclosure of noncontrolling interests [Line Items] |  |  |
Non-controlling interests | 123 | 119 |
Net Income | R$ 61 | R$ 46 |

X
- Definition The amount of equity in a subsidiary not attributable, directly or indirectly, to a parent. [Refer: Subsidiaries [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 12 -IssueDate 2019-01-01 -Paragraph 12 -Subparagraph f -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=12&code=ifrs-tx-2019-en-r&anchor=para_12_f&doctype=Standard -URIDate 2019-03-27 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2019-01-01 -Paragraph 54 -Subparagraph q -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2019-en-r&anchor=para_54_q&doctype=Standard -URIDate 2019-03-27 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 10 -IssueDate 2019-01-01 -Paragraph 22 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=10&code=ifrs-tx-2019-en-r&anchor=para_22&doctype=Standard -URIDate 2019-03-27 + Details
Name: | ifrs-full_NoncontrollingInterests
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The profit (loss) from continuing and discontinued operations attributable to non-controlling interests. [Refer: Profit (loss); Non-controlling interests] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 12 -IssueDate 2019-01-01 -Paragraph 12 -Subparagraph e -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=12&code=ifrs-tx-2019-en-r&anchor=para_12_e&doctype=Standard -URIDate 2019-03-27 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2019-01-01 -Paragraph 81B -Subparagraph a -Clause i -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2019-en-r&anchor=para_81B_a_i&doctype=Standard -URIDate 2019-03-27 + Details
Name: | ifrs-full_ProfitLossAttributableToNoncontrollingInterests
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Disclosure of non-controlling interests Line Items + References No definition available. + Details
Name: | itub_DisclosureOfNoncontrollingInterestsLineItems
Namespace Prefix: | itub_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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

X
- Details
Name: | ifrs-full_SignificantInvestmentsInSubsidiariesAxis=itub_ItauCorpbancaColombiaSAMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInSubsidiariesAxis=itub_FinanceiraItauCBDSACreditoFinanciamentoeInvestimentoMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInSubsidiariesAxis=itub_LuizacredSASocCredFinanciamentoInvestimentoMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInSubsidiariesAxis=itub_OtherSubsidiariesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |