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Net Operating Revenue (Details 3) - BRL (R$)
R$ in Thousands
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
IfrsStatementLineItems [Line Items]      
Regulatory charges R$ 2,952,146 R$ 3,669,468 R$ 3,486,342
Energy Development Account CDE Energia [member]      
IfrsStatementLineItems [Line Items]      
Regulatory charges 2,659,092 2,670,262 1,737,716
Other Charges Rate Flags [Member]      
IfrsStatementLineItems [Line Items]      
Regulatory charges 1,216 724,414 1,480,361
Research And Development And Energy Efficiency [Member]      
IfrsStatementLineItems [Line Items]      
Regulatory charges 161,039 153,152 168,591
Global Reversion Reserve RGR Quota [member]      
IfrsStatementLineItems [Line Items]      
Regulatory charges 46,750 42,103 44,372
Energy Development Account CDE Uso [member]      
IfrsStatementLineItems [Line Items]      
Regulatory charges 68,901 65,460 42,973
Inspection Fee [Member]      
IfrsStatementLineItems [Line Items]      
Regulatory charges R$ 15,148 R$ 14,077 R$ 12,329