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Financial Assets at Amortized Cost-Securities - Summary of Financial Assets at Amortized Cost - Securities (Parenthetical) (Detail) - BRL (R$) R$ in Millions | Dec. 31, 2021 | Dec. 31, 2020
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Disclosure of Financial Assets [Line Items] |  |
Securities Pledged as Collateral of Funding Transactions of Financial Institutions and Clients | R$ 23,928 | R$ 28,150
Government securities - abroad [member] |  |
Disclosure of Financial Assets [Line Items] |  |
Securities Pledged as Collateral of Funding Transactions of Financial Institutions and Clients | 12,570 | 13,786
Corporate debt securities [member] |  |
Disclosure of Financial Assets [Line Items] |  |
Securities Pledged as Collateral of Funding Transactions of Financial Institutions and Clients | R$ 11,358 | R$ 14,364

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- Definition The amount of financial assets that the entity has pledged as collateral for liabilities or contingent liabilities, including amounts that have been reclassified in accordance with paragraph 3.2.23(a) of IFRS 9. [Refer: Contingent liabilities [member]; Financial assets] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2021-01-01 -Paragraph 14 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2021-en-r&anchor=para_14_a&doctype=Standard -URIDate 2021-03-24 + Details
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