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Provisions, Contingent Assets and Contingent Liabilities - Additional Information (Detail) - BRL (R$) | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020
Disclosure of Provisions [Line Items] |  |
Provisions | R$ 19,592,000,000 | R$ 19,819,000,000
Amounts related to banking operation | 42,324,000,000 |
Receivables balance arising from reimbursements of contingencies | 888,000,000 | 919,000,000
Civil lawsuits [Member] |  |
Disclosure of Provisions [Line Items] |  |
Total estimated risk | 4,903,000,000 | 4,470,000,000
Provisions | 0 |
Labor claims [Member] |  |
Disclosure of Provisions [Line Items] |  |
Total estimated risk | 448,000,000 | 389,000,000
Tax And Social Security Obligations [Member] |  |
Disclosure of Provisions [Line Items] |  |
Non-compensatory amounts | 35,855,000,000 | R$ 31,330,000,000
INSS [Member] |  |
Disclosure of Provisions [Line Items] |  |
Non-compensatory amounts | 8,119,000,000 |
INSS [Member] | Social Security Contributions [Member] |  |
Disclosure of Provisions [Line Items] |  |
Deposit balance | 1,032,000,000 |
Non-compensatory amounts | 1,823,000,000 |
PIS and COFINS [Member] |  |
Disclosure of Provisions [Line Items] |  |
Provisions recognized for tax and social securities lawsuits | 641,000,000 |
Deposit balance | 628,000,000 |
Reversal of revenues from depreciation in excess | 2,428,000,000 |
Irpj Csll Pis And Cofins [Member] |  |
Disclosure of Provisions [Line Items] |  |
Funding expenses | 4,923,000,000 |
IRPJ and CSLL [Member] |  |
Disclosure of Provisions [Line Items] |  |
Goodwill - Deduction | 3,479,000,000 |
Deductibility of losses in credit operations | 1,233,000,000 |
IRPJ [Member] |  |
Disclosure of Provisions [Line Items] |  |
Goodwill amount guaranteed in purchase agreements | 1,517,000,000 |
ISS [Member] |  |
Disclosure of Provisions [Line Items] |  |
Amounts related to banking operation | R$ 4,680,000,000 |

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- Definition The amount of additional goodwill recognised, except goodwill included in a disposal group that, on acquisition, meets the criteria to be classified as held for sale in accordance with IFRS 5. [Refer: Goodwill; Disposal groups classified as held for sale [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 3 -IssueDate 2021-01-01 -Paragraph B67 -Subparagraph d -Clause ii -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=3&code=ifrs-tx-2021-en-r&anchor=para_B67_d_ii&doctype=Appendix&subtype=B -URIDate 2021-03-24 + Details
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- Definition The increase (decrease) in goodwill. [Refer: Goodwill] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 3 -IssueDate 2021-01-01 -Paragraph B67 -Subparagraph d -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=3&code=ifrs-tx-2021-en-r&anchor=para_B67_d&doctype=Appendix&subtype=B -URIDate 2021-03-24 + Details
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- Definition The amount of liabilities of uncertain timing or amount, including provisions for employee benefits. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2021-01-01 -Paragraph 54 -Subparagraph l -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2021-en-r&anchor=para_54_l&doctype=Standard -URIDate 2021-03-24 + Details
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- Definition The amount of revenue arising from the rendering of services. [Refer: Revenue] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2021-01-01 -Paragraph 112 -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2021-en-r&anchor=para_112_c&doctype=Standard -URIDate 2021-03-24 + Details
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- Definition The decrease in an allowance account for credit losses of financial assets resulting from the reversal of impairment. [Refer: Allowance account for credit losses of financial assets] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Note Expiry date 2023-01-01 -Name IFRS -Number 7 -IssueDate 2021-01-01 -Paragraph 16 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2017-en-b&anchor=para_16&doctype=Standard&book=b -URIDate 2021-03-24 + Details
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- Definition Disclosure of provisions line items. + References No definition available. + Details
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- Definition Escrow deposit. + References No definition available. + Details
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- Definition Funding expenses. + References No definition available. + Details
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- Definition Income from reimbursements under contingencies + References No definition available. + Details
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- Definition Non-compensatory amounts. + References No definition available. + Details
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- Definition Provision for tax and social security lawsuits. + References No definition available. + Details
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