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Provision for legal proceedings and judicial deposits - Summary Changes in Provision for Legal Proceedings (Detail) - BRL (R$) R$ in Thousands		12 Months Ended
		Dec. 31, 2021	Dec. 31, 2020
Disclosure of other provisions [line items]
Legal proceedings provision beginning balance		R$ 1,360,898	R$ 1,354,171
Provisions		242,960	140,481
Settlement / Write-offs		(189,500)	(222,790)
Exchange rate			109
Interest	[1]	229,703	88,927
Legal proceedings provision ending balance		1,644,061	1,360,898
Legal proceedings provision, tax [member]
Disclosure of other provisions [line items]
Legal proceedings provision beginning balance		635,406	589,180
Provisions		24,559	25,443
Settlement / Write-offs		(15,331)	(11,947)
Exchange rate
Interest	[1]	2,976	32,730
Legal proceedings provision ending balance		647,610	635,406
Civil, environmental and regulatory [member]
Disclosure of other provisions [line items]
Legal proceedings provision beginning balance		350,769	332,527
Provisions		103,805	46,989
Settlement / Write-offs		(56,931)	(76,772)
Exchange rate
Interest	[1]	187,391	48,025
Legal proceedings provision ending balance		585,034	350,769
Legal proceedings provision, labor [member]
Disclosure of other provisions [line items]
Legal proceedings provision beginning balance		374,723	432,464
Provisions		114,596	68,049
Settlement / Write-offs		(117,238)	(134,071)
Exchange rate			109
Interest	[1]	39,336	8,172
Legal proceedings provision ending balance		R$ 411,417	R$ 374,723
[1] Includes write-off of interest due to reversals.

X

- Definition

The increase (decrease) in other provisions resulting from interest on provisions.

+ References

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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
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-URIDate 2021-03-24

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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.

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- Definition

The increase (decrease) in other provisions resulting from foreign currency exchange rate changes on provisions measured in a currency different from the entity's presentation currency. [Refer: Other provisions]

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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-Number 37
-IssueDate 2021-01-01
-Paragraph 84
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- Definition

The amount of non-current provision for legal proceedings. [Refer: Legal proceedings provision]

+ References

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-Name IAS
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-IssueDate 2021-01-01
-Section Example 10 A court case
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- Definition

The amount reversed for unused other provisions. [Refer: Other provisions]

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-IssueDate 2021-01-01
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