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v3.23.1

Post-employment benefits (Details 1) - BRL (R$) R$ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2022 | Dec. 31, 2021
IfrsStatementLineItems [Line Items] |  |
Fair Value | R$ 21,933 | R$ 21,912
Percentage of allocation | 100.00% | 100.00%
Fixed Income Securities 1 [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Fair Value | R$ 20,684 | R$ 19,904
Percentage of allocation | 94.40% | 90.80%
Fixed Income Securities 1 [Member] | Quoted in an active market [member] |  |
IfrsStatementLineItems [Line Items] |  |
Fair Value | R$ 20,102 | R$ 19,508
Percentage of allocation | 91.70% | 89.00%
Fixed Income Securities 1 [Member] | NonQuoted in an active market [member] |  |
IfrsStatementLineItems [Line Items] |  |
Fair Value | R$ 582 | R$ 396
Percentage of allocation | 2.70% | 1.80%
Variable income securities [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Fair Value | R$ 515 | R$ 1,323
Percentage of allocation | 2.30% | 6.10%
Variable income securities [Member] | Quoted in an active market [member] |  |
IfrsStatementLineItems [Line Items] |  |
Fair Value | R$ 508 | R$ 1,312
Percentage of allocation | 2.30% | 6.00%
Variable income securities [Member] | NonQuoted in an active market [member] |  |
IfrsStatementLineItems [Line Items] |  |
Fair Value | R$ 7 | R$ 11
Percentage of allocation |  | 10.00%
Structured investments [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Fair Value | R$ 138 | R$ 150
Percentage of allocation | 0.60% | 0.70%
Structured investments [Member] | NonQuoted in an active market [member] |  |
IfrsStatementLineItems [Line Items] |  |
Fair Value | R$ 138 | R$ 150
Percentage of allocation | 0.60% | 0.70%
Real estate 1 [member] |  |
IfrsStatementLineItems [Line Items] |  |
Fair Value | R$ 527 | R$ 462
Percentage of allocation | 2.40% | 2.10%
Loans to participants [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Fair Value | R$ 69 | R$ 73
Percentage of allocation | 0.30% | 0.30%

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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 2022-03-24 -Paragraph 57 -Subparagraph a -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=19&code=ifrs-tx-2022-en-r&anchor=para_57_a&doctype=Standard -URIDate 2022-03-24 + Details
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