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Financial Results (Details) - BRL (R$) R$ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
IfrsStatementLineItems [Line Items] |  |  |
Financial income | R$ 1,069,116 | R$ 956,413 | R$ 901,605
Financial expenses | 2,274,106 | 1,950,927 | 1,247,970
(-) Update of provision for destination of | (1,204,990) | (994,514) | (346,365)
PIS and Cofins credits |  | 1,011,370 |
Financial result, net | (1,204,990) | (2,005,884) | (346,365)
Return On Financial Investments [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Financial income | 540,672 | 406,270 | 146,408
Arrears Charges On Energy Bills [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Financial income | 200,341 | 265,818 | 320,469
Interest On Taxes To Be Offset [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Financial income | 89,938 | 63,810 | 36,649
Monetary Variation And Adjust To Present Value Of Accounts Payable Related To The Concession [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Financial income | 69,059 | 2,720 | 5,373
Financial expenses | 140,214 | 142,673 | 200,629
Remuneration Of Net Sectorial Assets And Liabilities Expense [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Financial income | 62,795 | 146,753 | 35,902
Income And Monetary Restatement Of Judicial Deposits [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Financial income | 55,092 | 42,846 | 21,167
Exchange Rate Variation Over The Itaipu Power Purchase [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Financial income | 17,073 | 43,946 | 30,043
Financial expenses | 10,605 | 27,584 | 58,814
Other Financial Income [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Financial income | 75,660 | 25,748 | 81,790
Pispasep And Cofins Taxes On Financial Income [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
(-) Pis/Pasep and Cofins taxes on financial income | (41,514) | (41,498) | (41,216)
Monetary And Exchange Variation And Debt Charges [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Financial expenses | 1,763,555 | 1,479,057 | 855,814
Monetary Restatement On The Provision For Legal [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Financial expenses | 77,715 |  | 8,621
Restatement Of Provision For Allocation Of Pis And Cofins Credits [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Financial expenses | 58,518 | 29,324 |
P I S Pasep Cofins Taxes On Interest On Capital [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Financial expenses | 101,251 | 107,720 | 34,382
Interest On Tax Installments [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Financial expenses | 39,569 | 38,111 | 13,618
Interest On R And D And EEP [member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Financial expenses | 26,009 | 33,810 | 15,115
Interest On Lease Liabilities [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Financial expenses | 24,292 | 19,441 | 13,176
Remuneration Of Net Sectorial Assets And Liabilities [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Financial expenses | 4,542 | 11,208 | 3,744
Other Financial Expenses [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Financial expenses | R$ 27,836 | R$ 61,999 | R$ 21,869

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