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Hedge accounting (Details 4) - BRL (R$) R$ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023
IfrsStatementLineItems [Line Items] |  |
Nominal Value | R$ 356,851 | R$ 282,444
Fair value hedges [member] |  |
IfrsStatementLineItems [Line Items] |  |
Book value of the hedged item, Assets | 75,643 | 37,771
Fair value of the hedge item, Assets | 75,736 | 37,983
Variation in fair value recognized in income | 270 | 327
Nominal Value | 101,443 | 54,243
Variation in fair value used to calculate hedge ineffectiveness | (267) | (318)
Hedged item, liabilities | 25,377 | 16,569
Accumulated fair value hedge adjustment on hedged item included in carrying amount, liabilities | 25,200 | 16,454
Hedge Of Loan Operations [Member] | Fair value hedges [member] |  |
IfrsStatementLineItems [Line Items] |  |
Book value of the hedged item, Assets | 37,116 | 12,592
Fair value of the hedge item, Assets | 37,423 | 12,597
Variation in fair value recognized in income | 307 | 5
Nominal Value | 37,116 | 12,589
Variation in fair value used to calculate hedge ineffectiveness | (304) | (5)
Hedge Of Funding [Member] | Fair value hedges [member] |  |
IfrsStatementLineItems [Line Items] |  |
Variation in fair value recognized in income | 199 | 119
Nominal Value | 25,287 | 16,304
Variation in fair value used to calculate hedge ineffectiveness | (199) | (120)
Hedged item, liabilities | 25,287 | 16,304
Accumulated fair value hedge adjustment on hedged item included in carrying amount, liabilities | 25,088 | 16,185
Hedge Of Securities [Member] | Fair value hedges [member] |  |
IfrsStatementLineItems [Line Items] |  |
Book value of the hedged item, Assets | 38,527 | 25,179
Fair value of the hedge item, Assets | 38,313 | 25,386
Variation in fair value recognized in income | (214) | 207
Nominal Value | 38,743 | 25,105
Variation in fair value used to calculate hedge ineffectiveness | 214 | (197)
Hedge Of Firm Commitments [Member] | Fair value hedges [member] |  |
IfrsStatementLineItems [Line Items] |  |
Book value of the hedged item, Assets |  |
Fair value of the hedge item, Assets |  |
Variation in fair value recognized in income | (22) | (4)
Nominal Value | 297 | 245
Variation in fair value used to calculate hedge ineffectiveness | 22 | 4
Hedged item, liabilities | 90 | 265
Accumulated fair value hedge adjustment on hedged item included in carrying amount, liabilities | R$ 112 | R$ 269

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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 an asset. [Refer: Hedged items [domain]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2024-01-01 -Paragraph 24B -Subparagraph a -Clause ii -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2024-en-r&anchor=para_24B_a_ii&doctype=Standard -URIDate 2024-03-27 + 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 [domain]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2024-01-01 -Paragraph 24B -Subparagraph a -Clause ii -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2024-en-r&anchor=para_24B_a_ii&doctype=Standard -URIDate 2024-03-27 + 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 2024-01-01 -Paragraph 24G -Subparagraph a -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2024-en-r&anchor=para_24G_a&doctype=Standard -URIDate 2024-03-27 + 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 2024-01-01 -Paragraph 24B -Subparagraph a -Clause iv -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2024-en-r&anchor=para_24B_a_iv&doctype=Standard -URIDate 2024-03-27 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2024-01-01 -Paragraph 24B -Subparagraph b -Clause i -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2024-en-r&anchor=para_24B_b_i&doctype=Standard -URIDate 2024-03-27 + Details
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- Definition The amount of a hedged item, recognised as an asset. [Refer: Hedged items [domain]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2024-01-01 -Paragraph 24B -Subparagraph a -Clause i -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2024-en-r&anchor=para_24B_a_i&doctype=Standard -URIDate 2024-03-27 + Details
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- Definition The amount of a hedged item, recognised as a liability. [Refer: Hedged items [domain]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2024-01-01 -Paragraph 24B -Subparagraph a -Clause i -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2024-en-r&anchor=para_24B_a_i&doctype=Standard -URIDate 2024-03-27 + Details
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