Taxes to Recover - Summary of estimated recovery of ICMS assets (Detail) - BRL (R$) R$ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Disclosure Of Estimated Recovery Of ICMS Assets [Line Items]
Estimated recovery of ICMS assets	R$ 2,108,025	R$ 2,519,658
ICMS [member]
Disclosure Of Estimated Recovery Of ICMS Assets [Line Items]
Estimated recovery of ICMS assets	R$ 893,206	R$ 1,129,325

The amount of receivables from taxes other than income tax. Income taxes include all domestic and foreign taxes that are based on taxable profits. Income taxes also include taxes, such as withholding taxes, that are payable by a subsidiary, associate or joint arrangement on distributions to the reporting entity.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 1
-IssueDate 2021-01-01
-Paragraph 78
-Subparagraph b
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2021-en-r&anchor=para_78_b&doctype=Standard
-URIDate 2021-03-24

Name:	ifrs-full_ReceivablesFromTaxesOtherThanIncomeTax
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant