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Post-Employment Benefits - Summary of Defined Benefit Contribution (Detail) - BRL (R$) R$ in Millions | 12 Months Ended
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Dec. 31, 2021 | Dec. 31, 2020
Disclosure of defined benefit plans and defined contribution plans [Line Items] |  |
Estimated contribution | R$ 56 |
Contributions made | 75 | R$ 50
Retirement plan - FIU |  |
Disclosure of defined benefit plans and defined contribution plans [Line Items] |  |
Estimated contribution | 34 |
Contributions made | 43 | 45
Retiremente plan - FUNBEP |  |
Disclosure of defined benefit plans and defined contribution plans [Line Items] |  |
Estimated contribution | 22 |
Contributions made | R$ 32 | R$ 5

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- Definition The amount of employer contributions to retirement benefit plans. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 26 -IssueDate 2021-01-01 -Paragraph 35 -Subparagraph b -Clause i -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=26&code=ifrs-tx-2021-en-r&anchor=para_35_b_i&doctype=Standard -URIDate 2021-03-24 + Details
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- Definition The estimate of the expected contributions to be made to a defined benefit plan for the next annual reporting period. [Refer: Defined benefit plans [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 19 -IssueDate 2021-01-01 -Paragraph 147 -Subparagraph b -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=19&code=ifrs-tx-2021-en-r&anchor=para_147_b&doctype=Standard -URIDate 2021-03-24 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 19 -IssueDate 2021-01-01 -Paragraph 148 -Subparagraph d -Clause iii -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=19&code=ifrs-tx-2021-en-r&anchor=para_148_d_iii&doctype=Standard -URIDate 2021-03-24 + Details
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- Definition Disclosure of defined benefit plans and defined contribution plans [Line Items] + References No definition available. + Details
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