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36 Related Party Transactions (Details 2)
R$ in Thousands
 12 Months Ended
Dec. 31, 2020
BRL (R$)
Disclosure of transactions between related parties [line items]  
Amount insured R$ 83,328
Matrincha Transmissora [Member]  
Disclosure of transactions between related parties [line items]  
Final maturity Feb. 15, 2029
Amount insured R$ 90,000
Endorsement percent, Copel GeT 49.00%
Amount endorsement R$ 44,100
Mata de Santa Genebra [Member]  
Disclosure of transactions between related parties [line items]  
Final maturity Feb. 28, 2022
Amount insured R$ 78,300
Endorsement percent, Copel GeT 50.10%
Amount endorsement R$ 39,228