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Lease Operations - Lessee (Details Narrative) R$ in Millions	12 Months Ended
	Dec. 31, 2022 BRL (R$)
Operations
Cash outflow for lease	R$ 1,161
Leases renewed	772
Impairemnt for leases	R$ 0

X

- Definition

The cash outflow for leases.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 16
-IssueDate 2022-03-24
-Paragraph 53
-Subparagraph g
-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=16&code=ifrs-tx-2022-en-r&anchor=para_53_g&doctype=Standard
-URIDate 2022-03-24

+ Details

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Balance Type:	credit
Period Type:	duration

X

- Definition

Cash paid in leases renewed.

+ References

No definition available.

+ Details

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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

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

X

- References

No definition available.

+ Details

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Data Type:	xbrli:stringItemType
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