XML 109 R79.htm IDEA: XBRL DOCUMENT v3.25.1

Interbank deposits and securities purchased under agreements to resell (Details Narrative) - BRL (R$) R$ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
IfrsStatementLineItems [Line Items]
Losses	R$ (7)	R$ (20)
B Three Brasil Bolsa Balco [Member]
IfrsStatementLineItems [Line Items]
Amounts pledged in guarantee of operations	7,031	0
Central Bank [Member]
IfrsStatementLineItems [Line Items]
Amounts pledged in guarantee of repurchase agreement transactions	R$ 165,020	R$ 158,708

X

- References

No definition available.

+ Details

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

X

- References

No definition available.

+ Details

Name:	itub_IfrsStatementLineItems
Namespace Prefix:	itub_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- References

No definition available.

+ Details

Name:	itub_PledgedInGuaranteeOfOperations
Namespace Prefix:	itub_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- References

No definition available.

+ Details

Name:	itub_PledgedInGuaranteeOfRepurchaseAgreements
Namespace Prefix:	itub_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Details

Name:	ifrs-full_BorrowingsByNameAxis=itub_BThreeBrasilBolsaBalcoMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_BorrowingsByNameAxis=itub_CentralBankMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: