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Risk and Capital Management - Disclosure Of Financial Assets At Amortised Cost And At Fair Value Through Other Comprehensive Income And The Impact On Expected Credit Loss In Various Scenarios (Detail) - BRL (R$) R$ in Millions | 12 Months Ended
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Dec. 31, 2021 | Dec. 31, 2020
Disclosure Of Financial Assets At Amortised Cost And At Fair Value Through Other Comprehensive Income And The Impact On Expected Credit Loss In Various Scenarios [Line Items] |  |
Financial assets | R$ 1,915,573 | R$ 1,851,322
Financial Assets At Amortised Cost And At Fair Value Through Other Comprehensive Income [Member] |  |
Disclosure Of Financial Assets At Amortised Cost And At Fair Value Through Other Comprehensive Income And The Impact On Expected Credit Loss In Various Scenarios [Line Items] |  |
Expected Credit Loss | (46,348) | (51,480)
Financial Assets At Amortised Cost And At Fair Value Through Other Comprehensive Income [Member] | Pessimistic Scenario [Member] |  |
Disclosure Of Financial Assets At Amortised Cost And At Fair Value Through Other Comprehensive Income And The Impact On Expected Credit Loss In Various Scenarios [Line Items] |  |
Expected Increase Decrease In Expected Credit Loss | (340) | (830)
Financial Assets At Amortised Cost And At Fair Value Through Other Comprehensive Income [Member] | Base Case Scenario [Member] |  |
Disclosure Of Financial Assets At Amortised Cost And At Fair Value Through Other Comprehensive Income And The Impact On Expected Credit Loss In Various Scenarios [Line Items] |  |
Expected Increase Decrease In Expected Credit Loss | 163 | 491
Financial Assets At Amortised Cost And At Fair Value Through Other Comprehensive Income [Member] | Optimistic Scenario [Member] |  |
Disclosure Of Financial Assets At Amortised Cost And At Fair Value Through Other Comprehensive Income And The Impact On Expected Credit Loss In Various Scenarios [Line Items] |  |
Expected Increase Decrease In Expected Credit Loss | 1,788 | 1,416
Financial Assets At Amortised Cost And At Fair Value Through Other Comprehensive Income [Member] | Loan And Lease Operations And Other Securities [Member] |  |
Disclosure Of Financial Assets At Amortised Cost And At Fair Value Through Other Comprehensive Income And The Impact On Expected Credit Loss In Various Scenarios [Line Items] |  |
Financial assets | R$ 1,078,891 | R$ 951,343

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- Definition The amount of assets that are: (a) cash; (b) an equity instrument of another entity; (c) a contractual right: (i) to receive cash or another financial asset from another entity; or (ii) to exchange financial assets or financial liabilities with another entity under conditions that are potentially favourable to the entity; or (d) a contract that will, or may be, settled in the entity’s own equity instruments and is: (i) a non-derivative for which the entity is, or may be, obliged to receive a variable number of the entity’s own equity instruments; or (ii) a derivative that will, or may be, settled other than by the exchange of a fixed amount of cash or another financial asset for a fixed number of the entity’s own equity instruments. For this purpose the entity’s own equity instruments do not include puttable financial instruments classified as equity instruments in accordance with paragraphs 16A-16B of IAS 32, instruments that impose on the entity an obligation to deliver to another party a pro rata share of the net assets of the entity only on liquidation and are classified as equity instruments in accordance with paragraphs 16C-16D of IAS 32, or instruments that are contracts for the future receipt or delivery of the entity’s own equity instruments. [Refer: Financial instruments, class [member]; Financial liabilities] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2021-01-01 -Paragraph 25 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2021-en-r&anchor=para_25&doctype=Standard -URIDate 2021-03-24 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2021-01-01 -Paragraph 35H -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2021-en-r&anchor=para_35H&doctype=Standard -URIDate 2021-03-24 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2021-01-01 -Paragraph 35I -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2021-en-r&anchor=para_35I&doctype=Standard -URIDate 2021-03-24 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2021-01-01 -Paragraph 35M -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2021-en-r&anchor=para_35M&doctype=Standard -URIDate 2021-03-24 Reference 5: http://www.xbrl.org/2003/role/exampleRef -Name IFRS -Number 7 -IssueDate 2021-01-01 -Paragraph 35N -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2021-en-r&anchor=para_35N&doctype=Standard -URIDate 2021-03-24 + Details
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