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Hedge accounting (Details 5) - BRL (R$) | 12 Months Ended
--- | ---
Dec. 31, 2022 | Dec. 31, 2021
IfrsStatementLineItems [Line Items] |  |
Credit derivative, nominal amount | R$ 273,280,000,000 | R$ 148,125,000,000
Hedging instrument, assets | 4,556,000,000 | 7,061,000,000
Hedging instrument, liabilities | 1,965,000,000 | 3,748,000,000
Gain (loss) on hedge ineffectiveness recognised in profit or loss | (160,000,000) | (19,000,000)
Fair value hedges [member] |  |
IfrsStatementLineItems [Line Items] |  |
Credit derivative, nominal amount | 37,951,000,000 | 22,826,000,000
Fair value hedges [member] | Interest rate risk [member] |  |
IfrsStatementLineItems [Line Items] |  |
Credit derivative, nominal amount | 37,951,000,000 | 22,826,000,000
Hedging instrument, assets | 1,006,000,000 | 2,000,000
Hedging instrument, liabilities | 929,000,000 | 551,000,000
Gain (loss) on change in fair value of hedging instrument used as basis for recognising hedge ineffectiveness | (30,000,000) | (387,000,000)
Gain (loss) on hedge ineffectiveness recognised in profit or loss | (10,000,000) | (4,000,000)
Fair value hedges [member] | Interest rate risk [member] | Interest rate swap2 [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Credit derivative, nominal amount | 35,091,000,000 | 22,826,000,000
Hedging instrument, assets | 1,002,000,000 | 2,000,000
Hedging instrument, liabilities | 929,000,000 | 551,000,000
Gain (loss) on change in fair value of hedging instrument used as basis for recognising hedge ineffectiveness | (49,000,000) | (387,000,000)
Gain (loss) on hedge ineffectiveness recognised in profit or loss | (10,000,000) | R$ (4,000,000)
Fair value hedges [member] | Interest rate risk [member] | Interest rate futures [member] |  |
IfrsStatementLineItems [Line Items] |  |
Credit derivative, nominal amount | 2,860,000,000 |
Hedging instrument, assets | 4,000,000 |
Hedging instrument, liabilities |  |
Gain (loss) on change in fair value of hedging instrument used as basis for recognising hedge ineffectiveness | 19,000,000 |
Gain (loss) on hedge ineffectiveness recognised in profit or loss |  |

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- Definition The nominal amount of a credit derivative. [Refer: Derivatives [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2022-03-24 -Paragraph 24G -Subparagraph a -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2022-en-r&anchor=para_24G_a&doctype=Standard -URIDate 2022-03-24 + Details
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- Definition The gain (loss) on the change in fair value of the hedging instrument used as a basis for recognising hedge ineffectiveness. Hedge ineffectiveness is the extent to which the changes in the fair value or the cash flows of the hedging instrument are greater or less than those on the hedged item. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2022-03-24 -Paragraph 24A -Subparagraph c -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2022-en-r&anchor=para_24A_c&doctype=Standard -URIDate 2022-03-24 + Details
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- Definition The gain (loss) recognised in profit or loss on hedge ineffectiveness. [Refer: Gain (loss) on hedge ineffectiveness] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2022-03-24 -Paragraph 24C -Subparagraph a -Clause i -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2022-en-r&anchor=para_24C_a_i&doctype=Standard -URIDate 2022-03-24 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2022-03-24 -Paragraph 24C -Subparagraph b -Clause ii -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2022-en-r&anchor=para_24C_b_ii&doctype=Standard -URIDate 2022-03-24 + Details
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- Definition The amount of a hedging instrument, recognised as an asset. [Refer: Hedging instruments [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2022-03-24 -Paragraph 24A -Subparagraph a -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2022-en-r&anchor=para_24A_a&doctype=Standard -URIDate 2022-03-24 + Details
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- Definition The amount of a hedging instrument, recognised as a liability. [Refer: Hedging instruments [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2022-03-24 -Paragraph 24A -Subparagraph a -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2022-en-r&anchor=para_24A_a&doctype=Standard -URIDate 2022-03-24 + Details
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