XML 186 R149.htm IDEA: XBRL DOCUMENT
v3.22.1

Shareholders' equity - Summary of Calculation of Dividends and Interest on Capital (Detail) - BRL (R$) R$ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Disclosure of Dividends [abstract] |  |  |
Statutory net income | R$ 26,236 | R$ 18,961 | R$ 26,712
Legal reserve | (1,312) | (948) | (1,336)
Dividend calculation basis | 24,924 | 18,013 | 25,376
Mandatory dividend | 6,231 | 4,503 | 6,344
Dividends and Interest on Capital Paid / Accrued | R$ 6,231 | R$ 4,503 | R$ 18,777

X
- Definition A component of equity representing reserves created based on legal requirements. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2021-01-01 -Paragraph 55 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2021-en-r&anchor=para_55&doctype=Standard -URIDate 2021-03-24 + Details
Name: | ifrs-full_StatutoryReserve
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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

X
- Definition Dividend Calculation Basis + References No definition available. + Details
Name: | itub_DividendCalculationBasis
Namespace Prefix: | itub_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Dividends and interest on capital paid. + References No definition available. + Details
Name: | itub_DividendsAndInterestOnCapitalPaid
Namespace Prefix: | itub_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Legal reserve. + References No definition available. + Details
Name: | itub_LegalReserve
Namespace Prefix: | itub_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Mandatory Dividend + References No definition available. + Details
Name: | itub_MandatoryDividend
Namespace Prefix: | itub_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant