Goodwill and Intangible assets (Details Narrative) - BRL (R$) R$ in Millions	12 Months Ended
Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
IfrsStatementLineItems [Line Items]
Goodwill and intangible assets	R$ 23,997	R$ 23,364	R$ 23,114
Banco Itau [Member]
IfrsStatementLineItems [Line Items]
Goodwill and intangible assets	3,073	2,709
Acquisition Of Payrolls And Associations Rights [Member]
IfrsStatementLineItems [Line Items]
Amortization expense	R$ 1,313	R$ 1,249

The amount of amortisation of intangible assets other than goodwill. [Refer: Depreciation and amortisation expense; Intangible assets other than goodwill]

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 38
-IssueDate 2024-01-01
-Paragraph 118
-Subparagraph e
-Clause vi
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=38&code=ifrs-tx-2024-en-r&anchor=para_118_e_vi&doctype=Standard
-URIDate 2024-03-27

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