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Post-Employment Obligations - Schedule of main categories of plan assets (Details) - BRL (R$) R$ in Millions | Dec. 31, 2024 | Dec. 31, 2023
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IfrsStatementLineItems [Line Items] |  |
Fair value of plan assets | R$ 8,947 | R$ 9,882
Shares [member] |  |
IfrsStatementLineItems [Line Items] |  |
Fair value of plan assets | 1,076 | 1,339
Fixed income securities [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Fair value of plan assets | 6,560 | 7,475
Real estate property [member] |  |
IfrsStatementLineItems [Line Items] |  |
Fair value of plan assets | 479 | 440
Others [member] |  |
IfrsStatementLineItems [Line Items] |  |
Fair value of plan assets | R$ 832 | R$ 628

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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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