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v3.25.1

Post-employment benefits (Details 1) - BRL (R$) R$ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023
IfrsStatementLineItems [Line Items] |  |
Fair Value | R$ 21,490 | R$ 23,754
Percentage of allocation | 100.00% | 100.00%
Fixed Income Securities 1 [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Fair Value | R$ 20,732 | R$ 22,363
Percentage of allocation | 96.50% | 94.20%
Fixed Income Securities 1 [Member] | Quoted In An Active Market [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Fair Value | R$ 20,117 | R$ 21,705
Percentage of allocation | 93.60% | 91.40%
Fixed Income Securities 1 [Member] | Nonquoted In An Active Market [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Fair Value | R$ 615 | R$ 658
Percentage of allocation | 2.90% | 2.80%
Variable Income Securities [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Fair Value | R$ 9 | R$ 640
Percentage of allocation |  | 2.70%
Variable Income Securities [Member] | Quoted In An Active Market [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Fair Value | 4 | R$ 630
Percentage of allocation |  | 2.70%
Variable Income Securities [Member] | Nonquoted In An Active Market [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Fair Value | 5 | R$ 10
Structured Investments [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Fair Value | R$ 120 | R$ 128
Percentage of allocation | 0.60% | 0.50%
Structured Investments [Member] | Nonquoted In An Active Market [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Fair Value | R$ 120 | R$ 128
Percentage of allocation | 0.60% | 0.50%
Real Estate 1 [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Fair Value | R$ 546 | R$ 544
Percentage of allocation | 2.50% | 2.30%
Loans To Participants [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Fair Value | R$ 83 | R$ 79
Percentage of allocation | 0.40% | 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 2024-01-01 -Paragraph 57 -Subparagraph a -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=19&code=ifrs-tx-2024-en-r&anchor=para_57_a&doctype=Standard -URIDate 2024-03-27 + Details
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