XML 254 R217.htm IDEA: XBRL DOCUMENT
v3.22.1

Risk and Capital Management - Summary of Financial Assets Individually Evaluated Classified by Rating (Parenthetical) (Detail) - BRL (R$) R$ in Millions | Dec. 31, 2021 | Dec. 31, 2020
--- | --- | ---
Disclosure of financial assets individually evaluated classified by rating[Abstract] |  |
Derivatives | R$ 69,045 | R$ 76,504

X
- Definition The amount of financial assets classified as derivative instruments. [Refer: Financial assets; Derivatives [member]] + 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_DerivativeFinancialAssets
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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