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Contingent Assets and Liabilities, Provisions and Legal Obligations - Summary of Changes in Provisions (Detail) - BRL (R$) R$ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018
Disclosure of other provisions [line items] |  |
Opening balance | R$ 18,613 |
Closing balance | 21,454 | R$ 18,613
Provision for taxes other than income tax [member] |  |
Disclosure of other provisions [line items] |  |
Opening balance | 6,793 | 7,003
(-) Provisions guaranteed by indemnity clause | (68) | (66)
Subtotal | 6,725 | 6,937
Interest | 779 | 384
Changes in the period reflected in income | 843 | (259)
Increase | 1,135 | 392
Reversal | (292) | (651)
Payment | (151) | (337)
Subtotal | 8,196 | 6,725
(+) Provisions guaranteed by indemnity clause | 70 | 68
Closing balance | 8,266 | 6,793
Current | 83 | 107
Non-current | R$ 8,183 | R$ 6,686

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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 2019-01-01 -Paragraph 84 -Subparagraph b -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=37&code=ifrs-tx-2019-en-r&anchor=para_84_b&doctype=Standard -URIDate 2019-03-27 + 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 2019-01-01 -Paragraph 84 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=37&code=ifrs-tx-2019-en-r&anchor=para_84&doctype=Standard -URIDate 2019-03-27 + Details
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- Definition The amount of current provisions. [Refer: Provisions] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2019-01-01 -Paragraph 54 -Subparagraph l -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2019-en-r&anchor=para_54_l&doctype=Standard -URIDate 2019-03-27 + 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 2019-01-01 -Paragraph 84 -Subparagraph b -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=37&code=ifrs-tx-2019-en-r&anchor=para_84_b&doctype=Standard -URIDate 2019-03-27 + Details
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- Definition The amount of non-current provisions. [Refer: Provisions] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2019-01-01 -Paragraph 54 -Subparagraph l -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2019-en-r&anchor=para_54_l&doctype=Standard -URIDate 2019-03-27 + Details
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