XML 138 R126.htm IDEA: XBRL DOCUMENT v3.20.1

Lease - Leasee - Additional Information (Detail) R$ in Millions	12 Months Ended
	Dec. 31, 2019 BRL (R$)
Presentation of leases for lessee [abstract]
Cash outflow for lease	R$ 1,216
Leases renewed	579
Impairemnt for leases	R$ (175)

X

- Definition

The cash outflow for leases.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 16
-IssueDate 2019-01-01
-Paragraph 53
-Subparagraph g
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=16&code=ifrs-tx-2019-en-r&anchor=para_53_g&doctype=Standard
-URIDate 2019-03-27

+ Details

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Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

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- References

No definition available.

+ Details

Name:	ifrs-full_PresentationOfLeasesForLesseeAbstract
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Cash paid in leases renewed.

+ References

No definition available.

+ Details

Name:	itub_CashPaidInLeasesRenewed
Namespace Prefix:	itub_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Imapairment loss on lease assets.

+ References

No definition available.

+ Details

Name:	itub_ImapairmentLossOnLeaseAssets
Namespace Prefix:	itub_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration