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Fair value of financial instruments (Details) - BRL (R$) R$ in Millions | Dec. 31, 2022 | Dec. 31, 2021
--- | --- | ---
IfrsStatementLineItems [Line Items] |  |
Financial assets at fair value through profit or loss | R$ 464,682 | R$ 434,169
Financial assets at fair value through other comprehensive income | 121,052 | 105,622
Investment funds [member] |  |
IfrsStatementLineItems [Line Items] |  |
Financial assets at fair value through profit or loss | 32,491 | 20,139
Level 1 of fair value hierarchy [member] |  |
IfrsStatementLineItems [Line Items] |  |
Financial assets at fair value through other comprehensive income | 116,638 | 104,018
Level 1 of fair value hierarchy [member] | Investment funds [member] |  |
IfrsStatementLineItems [Line Items] |  |
Financial assets at fair value through profit or loss | 954 | 653
Level 2 of fair value hierarchy [member] |  |
IfrsStatementLineItems [Line Items] |  |
Financial assets at fair value through other comprehensive income | 4,356 | 1,604
Level 2 of fair value hierarchy [member] | Investment funds [member] |  |
IfrsStatementLineItems [Line Items] |  |
Financial assets at fair value through profit or loss | 31,537 | 19,486
Level 3 of fair value hierarchy [member] |  |
IfrsStatementLineItems [Line Items] |  |
Financial assets at fair value |  | 1,563
Financial assets at fair value through profit or loss | 379 | 1,563
Financial assets at fair value through other comprehensive income | 58 |
Financial Assets Designated As At Fair Value Through Profit And Loss [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Financial assets at fair value | 507,526 | 470,746
Financial assets at fair value through profit or loss | 386,474 | 365,124
Financial Assets Designated As At Fair Value Through Profit And Loss [Member] | Level 1 of fair value hierarchy [member] |  |
IfrsStatementLineItems [Line Items] |  |
Financial assets at fair value | 391,297 | 366,930
Financial assets at fair value through profit or loss | 274,659 | 262,912
Financial Assets Designated As At Fair Value Through Profit And Loss [Member] | Level 2 of fair value hierarchy [member] |  |
IfrsStatementLineItems [Line Items] |  |
Financial assets at fair value | 115,792 | 102,253
Financial assets at fair value through profit or loss | 111,436 | 100,649
Financial Assets Designated As At Fair Value Through Profit And Loss [Member] | Level 3 of fair value hierarchy [member] |  |
IfrsStatementLineItems [Line Items] |  |
Financial assets at fair value | 437 | 1,563
Financial assets at fair value through profit or loss | 379 | 1,563
Brazilian government securities [member] |  |
IfrsStatementLineItems [Line Items] |  |
Financial assets at fair value through profit or loss | 231,912 | 224,799
Financial assets at fair value through other comprehensive income | 70,983 | 69,642
Brazilian government securities [member] | Level 1 of fair value hierarchy [member] |  |
IfrsStatementLineItems [Line Items] |  |
Financial assets at fair value through profit or loss | 226,056 | 218,449
Financial assets at fair value through other comprehensive income | 69,951 | 68,457
Brazilian government securities [member] | Level 2 of fair value hierarchy [member] |  |
IfrsStatementLineItems [Line Items] |  |
Financial assets at fair value through profit or loss | 5,856 | 6,350
Financial assets at fair value through other comprehensive income | 1,032 | 1,185
Government Securities [member] |  |
IfrsStatementLineItems [Line Items] |  |
Financial assets at fair value through profit or loss | 8,017 | 5,561
Financial assets at fair value through other comprehensive income | 37,910 | 30,194
Government Securities [member] | Level 1 of fair value hierarchy [member] |  |
IfrsStatementLineItems [Line Items] |  |
Financial assets at fair value through profit or loss | 8,017 | 5,561
Financial assets at fair value through other comprehensive income | 37,910 | 30,194
Corporates Debt Securities [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Financial assets at fair value through profit or loss | 112,679 | 114,468
Financial assets at fair value through other comprehensive income | 12,159 | 5,786
Corporates Debt Securities [Member] | Equity investments [member] |  |
IfrsStatementLineItems [Line Items] |  |
Financial assets at fair value through profit or loss | 15,537 | 19,357
Financial assets at fair value through other comprehensive income | 4,885 | 743
Corporates Debt Securities [Member] | Rural Product Note [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Financial assets at fair value through profit or loss | 2,517 | 6,852
Financial assets at fair value through other comprehensive income | 390 |
Corporates Debt Securities [Member] | Bank Deposit Certificates [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Financial assets at fair value through profit or loss | 360 | 150
Financial assets at fair value through other comprehensive income | 714 | 131
Corporates Debt Securities [Member] | Real Estate Receivables Certificates [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Financial assets at fair value through profit or loss | 1,480 | 1,012
Corporates Debt Securities [Member] | Debentures [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Financial assets at fair value through profit or loss | 62,942 | 65,788
Financial assets at fair value through other comprehensive income | 1,183 | 351
Corporates Debt Securities [Member] | Eurobonds and others [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Financial assets at fair value through profit or loss | 4,373 | 5,253
Financial assets at fair value through other comprehensive income | 4,279 | 4,498
Corporates Debt Securities [Member] | Financial credit bills [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Financial assets at fair value through profit or loss | 19,378 | 10,111
Financial assets at fair value through other comprehensive income | 13 | 6
Corporates Debt Securities [Member] | Promissory Notes [member] |  |
IfrsStatementLineItems [Line Items] |  |
Financial assets at fair value through profit or loss | 3,900 | 4,684
Corporates Debt Securities [Member] | Other [member] |  |
IfrsStatementLineItems [Line Items] |  |
Financial assets at fair value through profit or loss | 2,192 | 1,261
Corporates Debt Securities [Member] | Other Financial Assets [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Financial assets at fair value through profit or loss | 1,375 | 157
Corporates Debt Securities [Member] | All Other Countries [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Financial assets at fair value through other comprehensive income | 695 | 57
Corporates Debt Securities [Member] | Level 1 of fair value hierarchy [member] |  |
IfrsStatementLineItems [Line Items] |  |
Financial assets at fair value through profit or loss | 39,632 | 38,249
Financial assets at fair value through other comprehensive income | 8,777 | 5,367
Corporates Debt Securities [Member] | Level 1 of fair value hierarchy [member] | Equity investments [member] |  |
IfrsStatementLineItems [Line Items] |  |
Financial assets at fair value through profit or loss | 5,817 | 14,355
Financial assets at fair value through other comprehensive income | 4,770 | 743
Corporates Debt Securities [Member] | Level 1 of fair value hierarchy [member] | Bank Deposit Certificates [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Financial assets at fair value through other comprehensive income | 551 |
Corporates Debt Securities [Member] | Level 1 of fair value hierarchy [member] | Debentures [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Financial assets at fair value through profit or loss | 29,446 | 18,638
Financial assets at fair value through other comprehensive income | 538 | 134
Corporates Debt Securities [Member] | Level 1 of fair value hierarchy [member] | Eurobonds and others [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Financial assets at fair value through profit or loss | 4,369 | 5,244
Financial assets at fair value through other comprehensive income | 2,918 | 4,490
Corporates Debt Securities [Member] | Level 1 of fair value hierarchy [member] | Other [member] |  |
IfrsStatementLineItems [Line Items] |  |
Financial assets at fair value through profit or loss |  | 12
Corporates Debt Securities [Member] | Level 2 of fair value hierarchy [member] |  |
IfrsStatementLineItems [Line Items] |  |
Financial assets at fair value through profit or loss | 72,708 | 74,656
Financial assets at fair value through other comprehensive income | 3,324 | 419
Corporates Debt Securities [Member] | Level 2 of fair value hierarchy [member] | Equity investments [member] |  |
IfrsStatementLineItems [Line Items] |  |
Financial assets at fair value through profit or loss | 9,634 | 5,002
Financial assets at fair value through other comprehensive income | 70 |
Corporates Debt Securities [Member] | Level 2 of fair value hierarchy [member] | Rural Product Note [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Financial assets at fair value through profit or loss | 2,510 | 6,791
Financial assets at fair value through other comprehensive income | 390 |
Corporates Debt Securities [Member] | Level 2 of fair value hierarchy [member] | Bank Deposit Certificates [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Financial assets at fair value through profit or loss | 360 | 150
Financial assets at fair value through other comprehensive income | 150 | 131
Corporates Debt Securities [Member] | Level 2 of fair value hierarchy [member] | Real Estate Receivables Certificates [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Financial assets at fair value through profit or loss | 1,329 | 1,009
Corporates Debt Securities [Member] | Level 2 of fair value hierarchy [member] | Debentures [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Financial assets at fair value through profit or loss | 33,412 | 45,672
Financial assets at fair value through other comprehensive income | 645 | 217
Corporates Debt Securities [Member] | Level 2 of fair value hierarchy [member] | Eurobonds and others [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Financial assets at fair value through profit or loss |  | 1
Financial assets at fair value through other comprehensive income | 1,361 | 8
Corporates Debt Securities [Member] | Level 2 of fair value hierarchy [member] | Financial credit bills [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Financial assets at fair value through profit or loss | 19,371 | 10,098
Financial assets at fair value through other comprehensive income | 13 | 6
Corporates Debt Securities [Member] | Level 2 of fair value hierarchy [member] | Promissory Notes [member] |  |
IfrsStatementLineItems [Line Items] |  |
Financial assets at fair value through profit or loss | 3,900 | 4,684
Corporates Debt Securities [Member] | Level 2 of fair value hierarchy [member] | Other [member] |  |
IfrsStatementLineItems [Line Items] |  |
Financial assets at fair value through profit or loss | 2,192 | 1,249
Corporates Debt Securities [Member] | Level 2 of fair value hierarchy [member] | Other Financial Assets [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Financial assets at fair value through profit or loss | 1,335 | 157
Corporates Debt Securities [Member] | Level 2 of fair value hierarchy [member] | All Other Countries [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Financial assets at fair value through other comprehensive income | 695 | 57
Corporates Debt Securities [Member] | Level 3 of fair value hierarchy [member] |  |
IfrsStatementLineItems [Line Items] |  |
Financial assets at fair value through profit or loss | 339 | 1,563
Financial assets at fair value through other comprehensive income | 58 |
Corporates Debt Securities [Member] | Level 3 of fair value hierarchy [member] | Equity investments [member] |  |
IfrsStatementLineItems [Line Items] |  |
Financial assets at fair value through profit or loss | 86 |
Financial assets at fair value through other comprehensive income | 45 |
Corporates Debt Securities [Member] | Level 3 of fair value hierarchy [member] | Rural Product Note [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Financial assets at fair value through profit or loss | 7 | 61
Corporates Debt Securities [Member] | Level 3 of fair value hierarchy [member] | Bank Deposit Certificates [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Financial assets at fair value through other comprehensive income | 13 |
Corporates Debt Securities [Member] | Level 3 of fair value hierarchy [member] | Real Estate Receivables Certificates [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Financial assets at fair value through profit or loss | 151 | 3
Corporates Debt Securities [Member] | Level 3 of fair value hierarchy [member] | Debentures [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Financial assets at fair value through profit or loss | 84 | 1,478
Corporates Debt Securities [Member] | Level 3 of fair value hierarchy [member] | Eurobonds and others [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Financial assets at fair value through profit or loss | 4 | 8
Corporates Debt Securities [Member] | Level 3 of fair value hierarchy [member] | Financial credit bills [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Financial assets at fair value through profit or loss | 7 | 13
Corporates Debt Securities [Member] | Level 3 of fair value hierarchy [member] | Other Financial Assets [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Financial assets at fair value through profit or loss | 40 |
Financial Liability At Fair Value Through Profit Or Loss [Member] | All Other Countries [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Financial liabilities at fair value through profit or loss | 647 | 275
Financial Liability At Fair Value Through Profit Or Loss [Member] | Structured Note [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Financial liabilities at fair value through profit or loss | 64 | 114
Financial Liability At Fair Value Through Profit Or Loss [Member] | Others Financial Liabilities [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Financial liabilities at fair value through profit or loss | 583 | 161
Financial Liability At Fair Value Through Profit Or Loss [Member] | Level 2 of fair value hierarchy [member] | All Other Countries [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Financial liabilities at fair value through profit or loss | 647 | 275
Financial Liability At Fair Value Through Profit Or Loss [Member] | Level 2 of fair value hierarchy [member] | Structured Note [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Financial liabilities at fair value through profit or loss | 64 | 114
Financial Liability At Fair Value Through Profit Or Loss [Member] | Level 2 of fair value hierarchy [member] | Others Financial Liabilities [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Financial liabilities at fair value through profit or loss | R$ 583 | R$ 161

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- Definition The amount of financial assets that are measured at fair value and for which gains (losses) are recognised in profit or loss. A financial asset shall be measured at fair value through profit or loss unless it is measured at amortised cost or at fair value through other comprehensive income. A gain (loss) on a financial asset measured at fair value shall be recognised in profit or loss unless it is part of a hedging relationship, it is an investment in an equity instrument for which the entity has elected to present gains and losses in other comprehensive income or it is a financial asset measured at fair value through other comprehensive income. [Refer: At fair value [member]; Financial assets] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2022-03-24 -Paragraph 8 -Subparagraph a -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2022-en-r&anchor=para_8_a&doctype=Standard -URIDate 2022-03-24 + Details
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