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Financial assets at fair value through profit or loss and designated at fair value through profit or loss - Securities (Details 1) - BRL (R$) R$ in Millions | Dec. 31, 2022 | Dec. 31, 2021
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Financial assets at carrying value [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Cost and fair value of financial assets held for trading by maturity, current | R$ 147,563 | R$ 78,151
Cost and fair value of financial assets held for trading by maturity, non-current | 241,951 | 287,435
Total | 389,514 | 365,586
Financial assets at carrying value [Member] | Non-stated maturity [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Cost and fair value of financial assets held for trading by maturity, current | 39,137 | 33,781
Financial assets at carrying value [Member] | Not later than one year [member] |  |
IfrsStatementLineItems [Line Items] |  |
Cost and fair value of financial assets held for trading by maturity, current | 108,426 | 44,370
Financial assets at carrying value [Member] | Later than one year and not later than five years [member] |  |
IfrsStatementLineItems [Line Items] |  |
Cost and fair value of financial assets held for trading by maturity, non-current | 170,372 | 212,424
Financial assets at carrying value [Member] | Later than five years and not later than ten years [member] |  |
IfrsStatementLineItems [Line Items] |  |
Cost and fair value of financial assets held for trading by maturity, non-current | 49,186 | 51,434
Financial assets at carrying value [Member] | Later than ten years [member] |  |
IfrsStatementLineItems [Line Items] |  |
Cost and fair value of financial assets held for trading by maturity, non-current | 22,393 | 23,577
Financial assets at fair value, class [member] |  |
IfrsStatementLineItems [Line Items] |  |
Cost and fair value of financial assets held for trading by maturity, current | 145,722 | 77,057
Cost and fair value of financial assets held for trading by maturity, non-current | 237,817 | 284,866
Total | 383,539 | 361,923
Financial assets at fair value, class [member] | Non-stated maturity [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Cost and fair value of financial assets held for trading by maturity, current | 37,223 | 32,853
Financial assets at fair value, class [member] | Not later than one year [member] |  |
IfrsStatementLineItems [Line Items] |  |
Cost and fair value of financial assets held for trading by maturity, current | 108,499 | 44,204
Financial assets at fair value, class [member] | Later than one year and not later than five years [member] |  |
IfrsStatementLineItems [Line Items] |  |
Cost and fair value of financial assets held for trading by maturity, non-current | 169,113 | 211,325
Financial assets at fair value, class [member] | Later than five years and not later than ten years [member] |  |
IfrsStatementLineItems [Line Items] |  |
Cost and fair value of financial assets held for trading by maturity, non-current | 47,916 | 50,688
Financial assets at fair value, class [member] | Later than ten years [member] |  |
IfrsStatementLineItems [Line Items] |  |
Cost and fair value of financial assets held for trading by maturity, non-current | R$ 20,788 | R$ 22,853

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- Definition The amount of current financial assets measured at fair value through profit or loss classified as held for trading. [Refer: Financial assets at fair value through profit or loss, classified as held for trading] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2022-03-24 -Paragraph 55 -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2022-en-r&anchor=para_55&doctype=Standard -URIDate 2022-03-24 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Note Expiry date 2023-01-01 -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-2017-en-b&anchor=para_8_a&doctype=Standard&book=b -URIDate 2022-03-24 + Details
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- Definition The amount of financial assets at fair value through profit or loss classified as held for trading. A financial asset is classified as held for trading if: (a) it is acquired principally for the purpose of selling it in the near term; (b) on initial recognition it is part of a portfolio of identified financial instruments that are managed together and for which there is evidence of a recent actual pattern of short-term profit-taking; or (c) it is a derivative (except for a derivative that is a financial guarantee contract or a designated and effective hedging instrument). [Refer: At fair value [member]; Financial assets at fair value through profit or loss] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2022-03-24 -Paragraph 55 -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2022-en-r&anchor=para_55&doctype=Standard -URIDate 2022-03-24 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Note Expiry date 2023-01-01 -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-2017-en-b&anchor=para_8_a&doctype=Standard&book=b -URIDate 2022-03-24 + Details
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- Definition The amount of non-current financial assets that are measured at fair value through profit or loss and that are classified as held for trading. [Refer: Financial assets at fair value through profit or loss, classified as held for trading] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2022-03-24 -Paragraph 55 -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2022-en-r&anchor=para_55&doctype=Standard -URIDate 2022-03-24 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Note Expiry date 2023-01-01 -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-2017-en-b&anchor=para_8_a&doctype=Standard&book=b -URIDate 2022-03-24 + Details
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