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Schedule of financial covenants (Details)
 12 Months Ended
Dec. 31, 2021
Debentures Four [Member] | Copel geracaoe transmissao SA [member]  
IfrsStatementLineItems [Line Items]  
Contract 7th issue of Debentures
Changes in Actuarial Assets | Copel geracaoe transmissao SA [member]  
IfrsStatementLineItems [Line Items]  
Company name Copel GeT
Contract 4th issue of Debentures
Debentures 5 [Member] | Copel geracaoe transmissao SA [member]  
IfrsStatementLineItems [Line Items]  
Contract 3rd issue of Debentures
Sensitivity Analysis | Copel geracaoe transmissao SA [member]  
IfrsStatementLineItems [Line Items]  
Contract 5th issue of Debentures
Sensitivity Analysis | CCEE liabilities  
IfrsStatementLineItems [Line Items]  
Company name Copel DIS
Contract 3rd issue of Debentures
Sensitivity Analysis | Ventos de Santo Uriel  
IfrsStatementLineItems [Line Items]  
Company name Cutia
Contract 1st issue of Debentures
Annual financial index Debt service coverage ratio (a) [1]
Limit ≥ 1.2
Debentures Three [Member] | Copel geracaoe transmissao SA [member]  
IfrsStatementLineItems [Line Items]  
Contract 6th issue of Debentures
Debentures Three [Member] | CCEE liabilities  
IfrsStatementLineItems [Line Items]  
Contract 4th issue of Debentures
Debentures Foure One [Member] | CCEE liabilities  
IfrsStatementLineItems [Line Items]  
Contract 5th issue of Debentures
Debentures Five One [Member] | CCEE liabilities  
IfrsStatementLineItems [Line Items]  
Contract 6th issue of Debentures
Estimated Net Periodic Plan Costs (Gains) | Nova Asa Branca I  
IfrsStatementLineItems [Line Items]  
Company name Nova Asa Branca I
Estimated Net Periodic Plan Costs (Gains) | Nova Asa Branca III  
IfrsStatementLineItems [Line Items]  
Company name Nova Asa Branca III
Contract 2nd issue of Debentures
Annual financial index Debt service coverage ratio
Limit ≥ 1.3
Estimated Net Periodic Plan Costs (Gains) | Nova Asa Branca II  
IfrsStatementLineItems [Line Items]  
Company name Nova Asa Branca II
Estimated Net Periodic Plan Costs (Gains) | Nova Eurus IV  
IfrsStatementLineItems [Line Items]  
Company name Nova Eurus IV
Estimated Net Periodic Plan Costs (Gains) | Ventos de Santo Uriel  
IfrsStatementLineItems [Line Items]  
Company name Ventos de Santo Uriel
Changes in Equity Attributable to Non-Controlling Shareholders | Debentures Six [Member]  
IfrsStatementLineItems [Line Items]  
Company name Copel
Contract 7th issue of Debentures
Changes in Equity Attributable to Non-Controlling Shareholders | Debentures Four [Member]  
IfrsStatementLineItems [Line Items]  
Annual financial index Consolidated net debt / Consolidated EBITDA Debt service coverage ratio
Limit ≤  3.5 ≥ 1.5
Changes in Equity Attributable to Non-Controlling Shareholders | Debentures Seven [Member]  
IfrsStatementLineItems [Line Items]  
Contract 8th issue of Debentures
[1] The variation in provisions for legal claims occurred due to the review of the assessment of the Company’s legal advisors, mainly in civil claims. The details of the actions are shown in Note 30.