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Financial Instruments (Details 4) - Interest Rate Risk And Monetary Variation [Member]
R$ in Thousands
Dec. 31, 2023
BRL (R$)
IfrsStatementLineItems [Line Items]  
Financial liabilities, Baseline R$ (16,944,839)
Financial liabilities, projected probable (1,176,834)
Financial liabilities, projected scenario 1 (1,471,042)
Financial liabilities, projected scenario 2 (1,765,253)
Loans And Financing Banco Do Brasil [Member]  
IfrsStatementLineItems [Line Items]  
Financial liabilities, Baseline (751,096)
Financial liabilities, projected probable (67,599)
Financial liabilities, projected scenario 1 (84,498)
Financial liabilities, projected scenario 2 (101,398)
Banco Itau [Member]  
IfrsStatementLineItems [Line Items]  
Financial liabilities, Baseline (1,039,097)
Financial liabilities, projected probable (93,519)
Financial liabilities, projected scenario 1 (116,898)
Financial liabilities, projected scenario 2 (140,278)
Loans And Financing BNDES1 [member]  
IfrsStatementLineItems [Line Items]  
Financial liabilities, Baseline (1,560,824)
Financial liabilities, projected probable (100,363)
Financial liabilities, projected scenario 1 (125,454)
Financial liabilities, projected scenario 2 (150,545)
Loans And Financing BNDES [member]  
IfrsStatementLineItems [Line Items]  
Financial liabilities, Baseline (392,709)
Financial liabilities, projected probable (15,159)
Financial liabilities, projected scenario 1 (18,948)
Financial liabilities, projected scenario 2 (22,738)
Promissory Notes Banco Do Nordeste [Member]  
IfrsStatementLineItems [Line Items]  
Financial liabilities, Baseline (1,584,566)
Financial liabilities, projected probable (61,164)
Financial liabilities, projected scenario 1 (76,455)
Financial liabilities, projected scenario 2 (91,746)
Promissory Notes Banco Do Brasil Distribution Of Funds From BNDES [member]  
IfrsStatementLineItems [Line Items]  
Financial liabilities, Baseline (49,263)
Financial liabilities, projected probable (3,168)
Financial liabilities, projected scenario 1 (3,960)
Financial liabilities, projected scenario 2 (4,752)
Promissory Notes Other [Member]  
IfrsStatementLineItems [Line Items]  
Financial liabilities, Baseline (10,422)
Financial liabilities, projected probable
Financial liabilities, projected scenario 1
Financial liabilities, projected scenario 2
Debentures [Member]  
IfrsStatementLineItems [Line Items]  
Financial liabilities, Baseline (6,587,635)
Financial liabilities, projected probable (592,887)
Financial liabilities, projected scenario 1 (741,109)
Financial liabilities, projected scenario 2 (889,331)
Debentures One [Member]  
IfrsStatementLineItems [Line Items]  
Financial liabilities, Baseline (3,067,627)
Financial liabilities, projected probable (118,410)
Financial liabilities, projected scenario 1 (148,013)
Financial liabilities, projected scenario 2 (177,616)
Debentures Two [Member]  
IfrsStatementLineItems [Line Items]  
Financial liabilities, Baseline (82,744)
Financial liabilities, projected probable (5,321)
Financial liabilities, projected scenario 1 (6,651)
Financial liabilities, projected scenario 2 (7,981)
Sectorial Financial Liabilities [Member]  
IfrsStatementLineItems [Line Items]  
Financial liabilities, Baseline (503,991)
Financial liabilities, projected probable (45,359)
Financial liabilities, projected scenario 1 (56,699)
Financial liabilities, projected scenario 2 (68,039)
ICMS Installment Payment [member]  
IfrsStatementLineItems [Line Items]  
Financial liabilities, Baseline (41,286)
Financial liabilities, projected probable (3,716)
Financial liabilities, projected scenario 1 (4,645)
Financial liabilities, projected scenario 2 (5,574)
Special Tax Regularization Program Pert [Member]  
IfrsStatementLineItems [Line Items]  
Financial liabilities, Baseline (379,724)
Financial liabilities, projected probable (34,175)
Financial liabilities, projected scenario 1 (42,719)
Financial liabilities, projected scenario 2 (51,263)
Payable Related To Concession [Member]  
IfrsStatementLineItems [Line Items]  
Financial liabilities, Baseline (828,695)
Financial liabilities, projected probable (33,479)
Financial liabilities, projected scenario 1 (41,849)
Financial liabilities, projected scenario 2 (50,219)
Payable Related To Concession One [Member]  
IfrsStatementLineItems [Line Items]  
Financial liabilities, Baseline (65,160)
Financial liabilities, projected probable (2,515)
Financial liabilities, projected scenario 1 (3,144)
Financial liabilities, projected scenario 2 (3,773)
Bonds And Securities One [Member]  
IfrsStatementLineItems [Line Items]  
Financial assets, Baseline 495,495
Financial assets, projected probable 44,593
Financial assets, projected scenario 1 33,445
Financial assets, projected scenario 2 22,296
Collaterals And Escrow Accounts [Member]  
IfrsStatementLineItems [Line Items]  
Financial assets, Baseline 9
Financial assets, projected probable 1
Financial assets, projected scenario 1 1
Financial assets, projected scenario 2
Sectorial Financial Assets [Member]  
IfrsStatementLineItems [Line Items]  
Financial assets, Baseline 30,946
Financial assets, projected probable 2,785
Financial assets, projected scenario 1 2,089
Financial assets, projected scenario 2 1,393
Accounts Receivable Related To The Concession [Member]  
IfrsStatementLineItems [Line Items]  
Financial assets, Baseline 2,747,420
Financial assets, projected probable 106,050
Financial assets, projected scenario 1 79,538
Financial assets, projected scenario 2 53,025
Accounts Receivable Related To Generation Concession [Member]  
IfrsStatementLineItems [Line Items]  
Financial assets, Baseline 71,835
Financial assets, projected probable
Financial assets, projected scenario 1
Financial assets, projected scenario 2
Financial Assets 1 [Member]  
IfrsStatementLineItems [Line Items]  
Financial assets, Baseline 3,345,705
Financial assets, projected probable 153,429
Financial assets, projected scenario 1 115,073
Financial assets, projected scenario 2 R$ 76,714