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Contract assets (Details 4) - BRL (R$)
R$ in Thousands
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Concession Assets [Member]    
IfrsStatementLineItems [Line Items]    
Construction income 1.65% 1.65%
Operating And Maintenance Margin [Member]    
IfrsStatementLineItems [Line Items]    
Operating and maintenance margin 1.65% 1.65%
Remuneration Rate [Member]    
IfrsStatementLineItems [Line Items]    
Remuneration rate [1] 9.58% 9.56%
Contract correction index [2]  IPCA (b)   IPCA (b) 
R B S E Assets [Member]    
IfrsStatementLineItems [Line Items]    
Remuneration rate [1] 9.45% 9.54%
R B S E Assets One [Member]    
IfrsStatementLineItems [Line Items]    
Contract correction index  IPCA   IPCA 
Annual Rap [Member]    
IfrsStatementLineItems [Line Items]    
Annual RAP, according to Homologatory Resolution R$ 523,713 R$ 456,499
R B S E Assets Two [Member]    
IfrsStatementLineItems [Line Items]    
Annual RAP, according to Homologatory Resolution R$ 242,836 R$ 192,288
[1] Average rate of contracts
[2] Contract 075/2001 - LT 230 kV Bateias - Jaguariaíva, from Copel GET, and contract 002/2005 - LT 525 kV Ivaiporã - Londrina, from Uirapuru, are adjusted by the IGPM.