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Provisions, Contingent Assets and Contingent Liabilities - Summary of Changes in Provisions (Detail) - BRL (R$) R$ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020
Disclosure of other provisions [line items] |  |
Opening balance | R$ 19,819 |
Closing balance | 19,592 | R$ 19,819
Provision for taxes other than income tax [member] |  |
Disclosure of other provisions [line items] |  |
Opening balance | 6,810 | 8,266
(-) Provisions guaranteed by indemnity clause | (71) | (68)
Subtotal | 6,739 | 8,198
Interest | 202 | 220
Changes in the period reflected in income | 8 | 56
Increase | 180 | 142
Reversal | (172) | (86)
Payment | (523) | (1,735)
Subtotal | 6,426 | 6,739
(+) Provisions guaranteed by indemnity clause | 72 | 71
Closing balance | 6,498 | 6,810
Current | 10 | 65
Non-current | R$ 6,488 | R$ 6,745

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- Definition The amount of additional other provisions made. [Refer: Other provisions] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 37 -IssueDate 2021-01-01 -Paragraph 84 -Subparagraph b -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=37&code=ifrs-tx-2021-en-r&anchor=para_84_b&doctype=Standard -URIDate 2021-03-24 + Details
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- Definition The increase (decrease) in other provisions. [Refer: Other provisions] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 37 -IssueDate 2021-01-01 -Paragraph 84 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=37&code=ifrs-tx-2021-en-r&anchor=para_84&doctype=Standard -URIDate 2021-03-24 + Details
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- Definition The amount of current provisions, including provisions for employee benefits. [Refer: Provisions] + 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 increase in existing other provisions. [Refer: Other provisions] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 37 -IssueDate 2021-01-01 -Paragraph 84 -Subparagraph b -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=37&code=ifrs-tx-2021-en-r&anchor=para_84_b&doctype=Standard -URIDate 2021-03-24 + Details
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- Definition The amount of non-current provisions, including provisions for employee benefits. [Refer: Provisions] + 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 used (ie incurred and charged against the provision) for other provisions. [Refer: Other provisions] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 37 -IssueDate 2021-01-01 -Paragraph 84 -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=37&code=ifrs-tx-2021-en-r&anchor=para_84_c&doctype=Standard -URIDate 2021-03-24 + Details
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