XML 92 R40.htm IDEA: XBRL DOCUMENT
v3.19.1

Subsequent Event | 12 Months Ended
--- | ---
Dec. 31, 2018
Text block1 [abstract] |
Subsequent Event | Note 34 – Subsequent Event Issuance Perpetual Subordinated Financial In January 2019, ITAÚ UNIBANCO HOLDING issued R$ 3.05 billion in Perpetual Subordinated Financial bills, in private negotiations with professional investors. The Financial Bills have repurchase option as from 2024, in addition to being eligible to compose the Supplementary Capital of Referential Equity of ITAÚ UNIBANCO HOLDING CONSOLIDATED, with an estimated impact of 0.4 p.p. in its Tier I Capitalization ratio. Both the repurchase and composition of capital are subject to authorization of the Central Bank of Brazil.

X
- Definition The entire disclosure for events after the reporting period. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 10 -IssueDate 2017-01-01 -Section Disclosure -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=10&date=2017-03-01&anchor=sect_Disclosure&doctype=Standard -URIDate 2017-03-09 + Details
Name: | ifrs-full_DisclosureOfEventsAfterReportingPeriodExplanatory
Namespace Prefix: | ifrs-full_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Text block1 [abstract] + References No definition available. + Details
Name: | itub_TextBlock1Abstract
Namespace Prefix: | itub_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration