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Stockholders' equity (Details 5) - BRL (R$) R$ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
IfrsStatementLineItems [Line Items] |  |  |
Non-controlling interests | R$ 9,390 | R$ 11,612 |
Income | 1,035 | 1,624 | R$ (3,832)
Income | 1,035 | 1,624 | (3,832)
Itau Corpbanca [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Non-controlling interests | 6,926 | 9,836 |
Income | 887 | 1,310 | (4,135)
Itau Corpbanca Colombia S.A. [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Non-controlling interests | 14 | 476 |
Income | 3 | 38 | (15)
Financeira Itau CBD S.A. Credito, Financiamento e Investimento [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Non-controlling interests | 769 | 666 |
Income | 123 | 131 | 164
Luizacred S A Soc Cred Financiamento Investimento [member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Non-controlling interests | 377 | 426 |
Income | (50) | 76 | 102
Other Subsidiaries [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Non-controlling interests | 1,304 | 208 |
Income | R$ 72 | R$ 69 | R$ 52

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