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The table below shows the equity interests acquired (Details)
 12 Months Ended
Dec. 31, 2021
Brownfield Investment Holding L Itda [Member]  
IfrsStatementLineItems [Line Items]  
Proportion of ownership interest in associate 100.00%
[custom:InvestorInAssociate]  Copel GeT 
Ventos D E Serra Do Mel B S A [Member]  
IfrsStatementLineItems [Line Items]  
Proportion of ownership interest in associate 68.84%
[custom:InvestorInAssociate]  Copel GeT 
Ventos D E Serra Do Mel B S A 1 [Member]  
IfrsStatementLineItems [Line Items]  
Proportion of ownership interest in associate 31.16%
[custom:InvestorInAssociate] Brownfield
Eol potiguar B61SPESA [member]  
IfrsStatementLineItems [Line Items]  
Proportion of ownership interest in associate 99.99992%
[custom:InvestorInAssociate] Copel GeT
Eol Potiguar B 61 S P E S A 1 [Member]  
IfrsStatementLineItems [Line Items]  
Proportion of ownership interest in associate 0.00008%
[custom:InvestorInAssociate] Brownfield
Eol Potiguar B 141 S P E S A One [Member]  
IfrsStatementLineItems [Line Items]  
Proportion of ownership interest in associate 100.00%
[custom:InvestorInAssociate]  Ventos de Serra do Mel 
Eol Potiguar B 142 S P E S A One [Member]  
IfrsStatementLineItems [Line Items]  
Proportion of ownership interest in associate 100.00%
[custom:InvestorInAssociate]  Ventos de Serra do Mel 
Eol Potiguar B 143 S P E S A One [Member]  
IfrsStatementLineItems [Line Items]  
Proportion of ownership interest in associate 100.00%
[custom:InvestorInAssociate]  Ventos de Serra do Mel 
Eol Ventosde Vila Paraiba I V S P E S A 1 [Member]  
IfrsStatementLineItems [Line Items]  
Proportion of ownership interest in associate 100.00%
[custom:InvestorInAssociate]  Ventos de Serra do Mel 
Brownfield Investment Holding L Itda [Member]  
IfrsStatementLineItems [Line Items]  
Name of subsidiary Brownfield Investment Holding Lltda. (Brownfield)
Ventos D E Serra Do Mel B S A [Member]  
IfrsStatementLineItems [Line Items]  
Name of subsidiary Ventos de Serra do Mel B S.A. 
Eol potiguar B61SPESA [member]  
IfrsStatementLineItems [Line Items]  
Name of subsidiary Eol Potiguar B61 SPE S.A.
Eol Potiguar B 141 S P E S A One [Member]  
IfrsStatementLineItems [Line Items]  
Name of subsidiary Eol Potiguar B141 SPE S.A.
Eol Potiguar B 142 S P E S A One [Member]  
IfrsStatementLineItems [Line Items]  
Name of subsidiary Eol Potiguar B142 SPE S.A.
Eol Potiguar B 143 S P E S A One [Member]  
IfrsStatementLineItems [Line Items]  
Name of subsidiary Eol Potiguar B143 SPE S.A.
Eol Ventosde Vila Paraiba I V S P E S A 1 [Member]  
IfrsStatementLineItems [Line Items]  
Name of subsidiary Eol Ventos de Vila Paraíba IV SPE S.A.