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Hedge accounting (Details 4) - 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
Fair value hedges [member] |  |
IfrsStatementLineItems [Line Items] |  |
Book value of the hedged item, Assets | 23,394,000,000 | 12,052,000,000
Fair value of the hedge item, Assets | 22,716,000,000 | 12,045,000,000
Variation in fair value recognized in income | 20,000,000 | 383,000,000
Credit derivative, nominal amount | 37,951,000,000 | 22,826,000,000
Variation in fair value used to calculate hedge ineffectiveness | (30,000,000) | (387,000,000)
Hedge Of Loan Operations [Member] | Fair value hedges [member] |  |
IfrsStatementLineItems [Line Items] |  |
Book value of the hedged item, Assets | 16,031,000,000 | 8,890,000,000
Fair value of the hedge item, Assets | 15,582,000,000 | 8,917,000,000
Variation in fair value recognized in income | (449,000,000) | 27,000,000
Credit derivative, nominal amount | 16,031,000,000 | 8,890,000,000
Variation in fair value used to calculate hedge ineffectiveness | 448,000,000 | (28,000,000)
Hedge of fair value through other comprehensive income [member] |  |
IfrsStatementLineItems [Line Items] |  |
Hedged item, liabilities | 14,603,000,000 | 11,051,000,000
Accumulated fair value hedge adjustment on hedged item included in carrying amount, liabilities | 13,905,000,000 | 10,661,000,000
Hedge of fair value through other comprehensive income [member] | Fair value hedges [member] |  |
IfrsStatementLineItems [Line Items] |  |
Book value of the hedged item, Assets | 7,363,000,000 | 3,162,000,000
Fair value of the hedge item, Assets | 7,134,000,000 | 3,128,000,000
Variation in fair value recognized in income | (229,000,000) | (34,000,000)
Credit derivative, nominal amount | 7,317,000,000 | 2,885,000,000
Variation in fair value used to calculate hedge ineffectiveness | 225,000,000 | 29,000,000
Hedge of fair value through other comprehensive income [member] | Hedge Of Funding [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Hedged item, liabilities | 14,603,000,000 | 11,051,000,000
Accumulated fair value hedge adjustment on hedged item included in carrying amount, liabilities | 13,905,000,000 | 10,661,000,000
Hedge Of Funding [Member] | Fair value hedges [member] |  |
IfrsStatementLineItems [Line Items] |  |
Variation in fair value recognized in income | 698,000,000 | 390,000,000
Credit derivative, nominal amount | 14,603,000,000 | 11,051,000,000
Variation in fair value used to calculate hedge ineffectiveness | (703,000,000) | (388,000,000)
Hedged Instrumnets Impacted By Change In Interest Rates [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Credit derivative, nominal amount | R$ 4,349,000,000 | R$ 6,422,000,000

X
- Definition The accumulated amount of fair value hedge adjustment on a hedged item that is included in the carrying amount of the hedged item, recognised in the statement of financial position as an asset. [Refer: Hedged items [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2022-03-24 -Paragraph 24B -Subparagraph a -Clause ii -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2022-en-r&anchor=para_24B_a_ii&doctype=Standard -URIDate 2022-03-24 + Details
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- Definition The accumulated amount of fair value hedge adjustment on a hedged item that is included in the carrying amount of the hedged item, recognised in the statement of financial position as a liability. [Refer: Hedged items [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2022-03-24 -Paragraph 24B -Subparagraph a -Clause ii -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2022-en-r&anchor=para_24B_a_ii&doctype=Standard -URIDate 2022-03-24 + Details
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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 hedged item 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 24B -Subparagraph a -Clause iv -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2022-en-r&anchor=para_24B_a_iv&doctype=Standard -URIDate 2022-03-24 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2022-03-24 -Paragraph 24B -Subparagraph b -Clause i -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2022-en-r&anchor=para_24B_b_i&doctype=Standard -URIDate 2022-03-24 + Details
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- Definition The amount of a hedged item, recognised as an asset. [Refer: Hedged items [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2022-03-24 -Paragraph 24B -Subparagraph a -Clause i -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2022-en-r&anchor=para_24B_a_i&doctype=Standard -URIDate 2022-03-24 + Details
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- Definition The amount of a hedged item, recognised as a liability. [Refer: Hedged items [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2022-03-24 -Paragraph 24B -Subparagraph a -Clause i -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2022-en-r&anchor=para_24B_a_i&doctype=Standard -URIDate 2022-03-24 + Details
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