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Derivatives (Details 6) - BRL (R$) R$ in Millions | Dec. 31, 2022 | Dec. 31, 2021
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IfrsStatementLineItems [Line Items] |  |
Maximum potential amount of future payments | R$ 34,156 | R$ 15,447
Brazilian Government [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Maximum potential amount of future payments | 28,988 | 11,882
Government Abroad [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Maximum potential amount of future payments | 280 | 196
Private Entities [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Maximum potential amount of future payments | 4,888 | 3,369
Investment grade [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Maximum potential amount of future payments | 1,944 | 516
Below Investment grade [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Maximum potential amount of future payments | 32,212 | 14,931
Not later than one year [member] |  |
IfrsStatementLineItems [Line Items] |  |
Maximum potential amount of future payments | 18,534 | 7,291
Not later than one year [member] | Brazilian Government [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Maximum potential amount of future payments | 17,195 | 6,144
Not later than one year [member] | Government Abroad [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Maximum potential amount of future payments | 91 | 33
Not later than one year [member] | Private Entities [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Maximum potential amount of future payments | 1,248 | 1,114
Not later than one year [member] | Investment grade [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Maximum potential amount of future payments | 218 | 194
Not later than one year [member] | Below Investment grade [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Maximum potential amount of future payments | 18,316 | 7,097
Later than one year and not later than three years [member] |  |
IfrsStatementLineItems [Line Items] |  |
Maximum potential amount of future payments | 6,368 | 3,566
Later than one year and not later than three years [member] | Brazilian Government [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Maximum potential amount of future payments | 4,543 | 1,792
Later than one year and not later than three years [member] | Government Abroad [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Maximum potential amount of future payments | 73 | 102
Later than one year and not later than three years [member] | Private Entities [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Maximum potential amount of future payments | 1,752 | 1,672
Later than one year and not later than three years [member] | Investment grade [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Maximum potential amount of future payments | 850 | 253
Later than one year and not later than three years [member] | Below Investment grade [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Maximum potential amount of future payments | 5,518 | 3,313
Later than three years and not later than five years [member] |  |
IfrsStatementLineItems [Line Items] |  |
Maximum potential amount of future payments | 9,176 | 4,590
Later than three years and not later than five years [member] | Brazilian Government [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Maximum potential amount of future payments | 7,172 | 3,946
Later than three years and not later than five years [member] | Government Abroad [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Maximum potential amount of future payments | 116 | 61
Later than three years and not later than five years [member] | Private Entities [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Maximum potential amount of future payments | 1,888 | 583
Later than three years and not later than five years [member] | Investment grade [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Maximum potential amount of future payments | 876 | 69
Later than three years and not later than five years [member] | Below Investment grade [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Maximum potential amount of future payments | 8,300 | 4,521
Later than five years [member] |  |
IfrsStatementLineItems [Line Items] |  |
Maximum potential amount of future payments | 78 |
Later than five years [member] | Brazilian Government [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Maximum potential amount of future payments | 78 |
Later than five years [member] | Below Investment grade [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Maximum potential amount of future payments | 78 |
Credit default swaps [member] |  |
IfrsStatementLineItems [Line Items] |  |
Maximum potential amount of future payments | 18,156 | 9,837
Credit default swaps [member] | Not later than one year [member] |  |
IfrsStatementLineItems [Line Items] |  |
Maximum potential amount of future payments | 2,534 | 1,681
Credit default swaps [member] | Later than one year and not later than three years [member] |  |
IfrsStatementLineItems [Line Items] |  |
Maximum potential amount of future payments | 6,368 | 3,566
Credit default swaps [member] | Later than three years and not later than five years [member] |  |
IfrsStatementLineItems [Line Items] |  |
Maximum potential amount of future payments | 9,176 | 4,590
Credit default swaps [member] | Later than five years [member] |  |
IfrsStatementLineItems [Line Items] |  |
Maximum potential amount of future payments | 78 |
Total Returns Swap [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Maximum potential amount of future payments | 16,000 | 5,610
Total Returns Swap [Member] | Not later than one year [member] |  |
IfrsStatementLineItems [Line Items] |  |
Maximum potential amount of future payments | R$ 16,000 | R$ 5,610

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