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Operating Costs and Expenses (Details 4) - Restated One [Member] - BRL (R$) R$ in Thousands | 12 Months Ended
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Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
IfrsStatementLineItems [Line Items] |  |  |
Credit losses, provisions and reversals | R$ 92,235 | R$ 717,531 | R$ 294,844
Provision Reversal For Litigations [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Credit losses, provisions and reversals | 157,668 | 623,742 | 174,225
Power Generation Concession Contract [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Credit losses, provisions and reversals | (3,193) | 9,061 | (2,604)
Property Plant And Equipment Expense [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Credit losses, provisions and reversals | (174,500) | (34,435) | (9,161)
Allowance For Doubtful Accounts Client And Other Credits [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Credit losses, provisions and reversals | 109,435 | 124,068 | 127,837
Tax Credits Estimated Losses [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Credit losses, provisions and reversals | 2,825 | (4,905) | 4,547
Provision For Losses On Equity Interests [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Credit losses, provisions and reversals |  |  |

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