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Other assets and liabilities (Details 1) - BRL (R$) R$ in Millions | Dec. 31, 2022 | Dec. 31, 2021
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IfrsStatementLineItems [Line Items] |  |
Other financial liabilities, Total | R$ 167,234 | R$ 134,267
Other financial liabilities at amortised cost, Total | 166,651 | 134,106
Other financial liabilities at fair value through profit or loss, Total | 583 | 161
Other non-financial liabilities, Total | 48,044 | 42,130
Other financial liabilities, Current | 206,029 | 167,789
Other financial liabilities, Non-current | 9,249 | 8,608
Credit Card Operations [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Other financial liabilities at amortised cost, Total | 138,300 | 108,997
Trading and intermediation of securities [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Other financial liabilities at amortised cost, Total | 17,744 | 12,161
Foreign Exchange Portfolio [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Other financial liabilities at amortised cost, Total | 2,580 | 2,485
Finance Leases [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Other financial liabilities at amortised cost, Total | 3,929 | 5,324
Other Financials Liabilities [member] |  |
IfrsStatementLineItems [Line Items] |  |
Other financial liabilities at amortised cost, Total | 4,098 | 5,139
Other financial liabilities at fair value through profit or loss, Total | 583 | 161
Funds In Transit [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Other non-financial liabilities, Total | 19,737 | 18,027
Collection And Payment Of Taxes And Contributions [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Other non-financial liabilities, Total | 553 | 457
Social And Statutory [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Other non-financial liabilities, Total | 10,375 | 7,853
Deferred income [member] |  |
IfrsStatementLineItems [Line Items] |  |
Other non-financial liabilities, Total | 2,737 | 3,278
Domestic Sundry Creditors [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Other non-financial liabilities, Total | 4,730 | 3,183
Personnel Provision [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Other non-financial liabilities, Total | 2,403 | 2,244
Provision For Sundry Payments [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Other non-financial liabilities, Total | 2,055 | 2,348
Liabilities For Official Agreements And Rendering Of Payment Services Member] |  |
IfrsStatementLineItems [Line Items] |  |
Other non-financial liabilities, Total | 1,725 | 1,261
Provision For Retirement Plan Benefits [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Other non-financial liabilities, Total | 2,320 | 2,209
Other non-financial liabilities [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Other non-financial liabilities, Total | R$ 1,409 | R$ 1,270

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