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Hedge accounting (Details) - BRL (R$) | 12 Months Ended
--- | ---
Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
IfrsStatementLineItems [Line Items] |  |  |
Gain (loss) on hedge ineffectiveness recognised in other comprehensive income | R$ (34,000,000) | R$ 699,000,000 | R$ (3,557,000,000)
Credit derivative, nominal amount | 273,280,000,000 | 148,125,000,000 |
Hedge Of Deposits And Repurchase Agreements [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Credit derivative, nominal amount | 149,210,000,000 | 39,136,000,000 |
Hedge Of Assets Transactions [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Credit derivative, nominal amount | 6,528,000,000 | 8,213,000,000 |
Hedge Of Asset Backed Securities Under Repurchase Agreements [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Credit derivative, nominal amount | 50,848,000,000 | 39,962,000,000 |
Hedge Of Assets Denominated In U F [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Credit derivative, nominal amount | 7,853,000,000 | 14,683,000,000 |
Hedge Of Highly Probable Forecast Transactions [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Credit derivative, nominal amount | 343,000,000 | 3,508,000,000 |
Cash flow hedges [member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Hedged item, liabilities | 156,884,000,000 | 44,891,000,000 |
Gain (loss) on hedge ineffectiveness recognised in other comprehensive income | (607,000,000) | (942,000,000) |
Increase Decrease In Cash Flow Hedge Reserve | (420,000,000) | (387,000,000) |
Credit derivative, nominal amount | 225,396,000,000 | 111,412,000,000 |
Gain (loss) on change in fair value of hedged item used as basis for recognising hedge ineffectiveness | (554,000,000) | (946,000,000) |
Hedged item, assets | 70,964,000,000 | 67,344,000,000 |
Cash flow hedges [member] | Hedge Of Deposits And Repurchase Agreements [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Credit derivative, nominal amount | 3,288,000,000 | 131,000,000 |
Cash flow hedges [member] | Hedge Of Loan Operations [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Credit derivative, nominal amount | 3,288,000,000 | 131,000,000 |
Interest rate risk [member] | Cash flow hedges [member] | Hedge Of Deposits And Repurchase Agreements [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Hedged item, liabilities | 149,300,000,000 | 39,142,000,000 |
Gain (loss) on hedge ineffectiveness recognised in other comprehensive income | 1,169,000,000 | 1,065,000,000 |
Increase Decrease In Cash Flow Hedge Reserve | 1,169,000,000 | 1,065,000,000 |
Credit derivative, nominal amount | 149,210,000,000 | 39,136,000,000 |
Gain (loss) on change in fair value of hedged item used as basis for recognising hedge ineffectiveness | 1,222,000,000 | 1,072,000,000 |
Interest rate risk [member] | Cash flow hedges [member] | Hedge Of Assets Transactions [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Gain (loss) on hedge ineffectiveness recognised in other comprehensive income | (367,000,000) | (409,000,000) |
Increase Decrease In Cash Flow Hedge Reserve | (367,000,000) | (409,000,000) |
Credit derivative, nominal amount | 63,528,000,000 | 8,213,000,000 |
Gain (loss) on change in fair value of hedged item used as basis for recognising hedge ineffectiveness | (367,000,000) | (409,000,000) |
Hedged item, assets | 6,894,000,000 | 8,621,000,000 |
Interest rate risk [member] | Cash flow hedges [member] | Hedge Of Asset Backed Securities Under Repurchase Agreements [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Gain (loss) on hedge ineffectiveness recognised in other comprehensive income | (1,508,000,000) | (1,686,000,000) |
Increase Decrease In Cash Flow Hedge Reserve | (1,508,000,000) | (1,686,000,000) |
Credit derivative, nominal amount | 50,848,000,000 | 39,962,000,000 |
Gain (loss) on change in fair value of hedged item used as basis for recognising hedge ineffectiveness | (1,508,000,000) | (1,698,000,000) |
Hedged item, assets | 52,916,000,000 | 40,526,000,000 |
Interest rate risk [member] | Cash flow hedges [member] | Hedge Of Loan Operations [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Gain (loss) on hedge ineffectiveness recognised in other comprehensive income | (6,000,000) |  |
Increase Decrease In Cash Flow Hedge Reserve | (6,000,000) |  |
Credit derivative, nominal amount | 3,288,000,000 | 131,000,000 |
Gain (loss) on change in fair value of hedged item used as basis for recognising hedge ineffectiveness | (6,000,000) | 1,000,000 |
Hedged item, assets | 3,283,000,000 | 131,000,000 |
Interest rate risk [member] | Cash flow hedges [member] | Hedge fund investments [member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Hedged item, liabilities | 6,881,000,000 | 5,749,000,000 |
Gain (loss) on hedge ineffectiveness recognised in other comprehensive income | 86,000,000 | 30,000,000 |
Increase Decrease In Cash Flow Hedge Reserve | 86,000,000 | 30,000,000 |
Credit derivative, nominal amount | 6,967,000,000 | 5,779,000,000 |
Gain (loss) on change in fair value of hedged item used as basis for recognising hedge ineffectiveness | 86,000,000 | 30,000,000 |
Interest rate risk [member] | Cash flow hedges [member] | Hedge Of Assets Denominated In U F [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Gain (loss) on hedge ineffectiveness recognised in other comprehensive income | 16,000,000 | (127,000,000) |
Increase Decrease In Cash Flow Hedge Reserve | 16,000,000 | (127,000,000) |
Credit derivative, nominal amount | 7,853,000,000 | 14,683,000,000 |
Gain (loss) on change in fair value of hedged item used as basis for recognising hedge ineffectiveness | 16,000,000 | (127,000,000) |
Hedged item, assets | 7,871,000,000 | 14,558,000,000 |
Interest rate risk [member] | Cash flow hedges [member] | Hedge Of Highly Probable Forecast Transactions [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Hedged item, liabilities | 343,000,000 |  |
Gain (loss) on hedge ineffectiveness recognised in other comprehensive income | 4,000,000 | 185,000,000 |
Increase Decrease In Cash Flow Hedge Reserve | 191,000,000 | 740,000,000 |
Credit derivative, nominal amount | 343,000,000 | 3,508,000,000 |
Gain (loss) on change in fair value of hedged item used as basis for recognising hedge ineffectiveness | 4,000,000 | 185,000,000 |
Hedged item, assets |  | R$ 3,508,000,000 |
Interest rate risk [member] | Cash flow hedges [member] | Hedge Of Funding [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Hedged item, liabilities | 360,000,000 |  |
Gain (loss) on hedge ineffectiveness recognised in other comprehensive income | (1,000,000) |  |
Increase Decrease In Cash Flow Hedge Reserve | (1,000,000) |  |
Credit derivative, nominal amount | 359,000,000 |  |
Gain (loss) on change in fair value of hedged item used as basis for recognising hedge ineffectiveness | R$ (1,000,000) |  |

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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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