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Schedule of allocation of plan assets (Details) - BRL (R$) R$ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
IfrsStatementLineItems [Line Items]
Allocation of plan assets	R$ 3,584,244	R$ 3,766,193	R$ 3,894,488
Plan assets percentage	100.00%	100.00%	100.00%
Variable Income [Member]
IfrsStatementLineItems [Line Items]
Allocation of plan assets	R$ 195,032	R$ 54,285	R$ 25,236
Plan assets percentage	5.44%	1.44%	0.65%
Fixed Income [Member]
IfrsStatementLineItems [Line Items]
Allocation of plan assets	R$ 3,127,736	R$ 3,438,735	R$ 3,607,398
Plan assets percentage	87.26%	91.31%	92.63%
Real Estates [Member]
IfrsStatementLineItems [Line Items]
Allocation of plan assets	R$ 190,474	R$ 182,145	R$ 183,098
Plan assets percentage	5.31%	4.84%	4.70%
Others Plan Assets [Member]
IfrsStatementLineItems [Line Items]
Allocation of plan assets	R$ 71,002	R$ 91,028	R$ 78,756
Plan assets percentage	1.98%	2.42%	2.02%

X

- Definition

The fair value of defined benefit plan assets. Plan assets comprise assets held by a long-term employee benefit fund and qualifying insurance policies. [Refer: At fair value [member]]

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 19
-IssueDate 2021-01-01
-Paragraph 57
-Subparagraph a
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=19&code=ifrs-tx-2021-en-r&anchor=para_57_a&doctype=Standard
-URIDate 2021-03-24

+ Details

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- References

No definition available.

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- References

No definition available.

+ Details

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