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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%

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- 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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