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Hedge Accounting - Additional Information (Detail) - BRL (R$) R$ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2021 | Dec. 31, 2020
Disclosure of Detailed Information about Hedges [Line Items] |  |
Description of type of hedge | There are three types of hedge relations: Fair value hedge, Cash flow hedge and Hedge of net investment in foreign operations. |
Risk factor designated coverage ratio | 100.00% |
Balance reserve in cash flow hedge for which hedge accounting is no longer applied | R$ 555 | R$ 218
Reversal of hedging | 11,752 |
Foreign currency conversion reserve | (6,238) |
Fair value of hedge securities, other comprehensive income | 104 |
Cash flow hedges [member] |  |
Disclosure of Detailed Information about Hedges [Line Items] |  |
Reversal of hedging | R$ 7,976 |

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- Definition The description of the type of a hedge used by the entity. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Note Expiry date 2023-01-01 -Name IFRS -Number 7 -IssueDate 2021-01-01 -Paragraph 22 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2017-en-b&anchor=para_22_a&doctype=Standard&book=b -URIDate 2021-03-24 + Details
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- Definition Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with members defined in one or many axes of the table. + References No definition available. + Details
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- Definition A component of equity representing the reserve of cash flow hedges in relation to hedging relationships for which hedge accounting is no longer applied. [Refer: Reserve of cash flow hedges] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2021-01-01 -Paragraph 24B -Subparagraph b -Clause iii -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2021-en-r&anchor=para_24B_b_iii&doctype=Standard -URIDate 2021-03-24 + Details
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- Definition Fair value of hedge securities, other comprehensive income . + References No definition available. + Details
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- Definition Foreign currency conversion reserve . + References No definition available. + Details
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- Definition Reversal of hedging . + References No definition available. + Details
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- Definition Risk exposure, coverage percentage. + References No definition available. + Details
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- Details
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