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Financial Instruments (Details) - BRL (R$) R$ in Thousands | Dec. 31, 2022 | Dec. 31, 2021
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IfrsStatementLineItems [Line Items] |  |  |  |  |
Total financial liabilities, book value |  | R$ 10,338,902 |  | R$ 12,405,227 |
Total financial assets, fair value |  | 10,438,723 |  | 12,475,928 |
Total financial liabilities, fair value |  | 18,727,925 |  | 19,801,787 |
Total financial liabilities, book value |  | 19,404,557 |  | 20,181,117 |
Financial liabilities at amortised cost, class [member] |  |  |  |  |
IfrsStatementLineItems [Line Items] |  |  |  |  |
Total financial liabilities, fair value |  | 17,989,222 |  | 19,256,319 |
Total financial liabilities, book value |  | 18,665,854 |  | 19,635,649 |
Financial liabilities at fair value through profit or loss, category [member] |  |  |  |  |
IfrsStatementLineItems [Line Items] |  |  |  |  |
Total financial liabilities, fair value |  | 738,703 |  | 545,468 |
Total financial liabilities, book value |  | 738,703 |  | 545,468 |
Sectorial Financial Liabilities [Member] | Financial liabilities at amortised cost, class [member] |  |  |  |  |
IfrsStatementLineItems [Line Items] |  |  |  |  |
Total financial liabilities, fair value | [1] | 483,255 |  | 293,179 |
Total financial liabilities, book value | [1] | 483,255 |  | 293,179 |
I C M S Installment Payment [Member] | Financial liabilities at amortised cost, class [member] |  |  |  |  |
IfrsStatementLineItems [Line Items] |  |  |  |  |
Total financial liabilities, fair value | [2] | 43,419 |  | (0) |
Total financial liabilities, book value | [2] | 48,320 |  | (0) |
Special Tax Regularization Program Pert [Member] | Financial liabilities at amortised cost, class [member] |  |  |  |  |
IfrsStatementLineItems [Line Items] |  |  |  |  |
Total financial liabilities, fair value | [2] | 340,025 |  | 361,080 |
Total financial liabilities, book value | [2] | 404,075 |  | 421,694 |
P I S And Cofins To Be Refunded To Consumers [Member] | Financial liabilities at amortised cost, class [member] |  |  |  |  |
IfrsStatementLineItems [Line Items] |  |  |  |  |
Total financial liabilities, fair value | [1] | 1,995,158 |  | 3,326,795 |
Total financial liabilities, book value | [1] | 1,995,158 |  | 3,326,795 |
Accounts Payable To Suppliers [Member] | Financial liabilities at amortised cost, class [member] |  |  |  |  |
IfrsStatementLineItems [Line Items] |  |  |  |  |
Total financial liabilities, fair value | [1] | 2,215,470 |  | 2,710,984 |
Total financial liabilities, book value | [1] | 2,215,470 |  | 2,710,984 |
Loans And Financing [Member] | Financial liabilities at amortised cost, class [member] |  |  |  |  |
IfrsStatementLineItems [Line Items] |  |  |  |  |
Total financial liabilities, fair value | [2] | 4,171,789 |  | 3,313,645 |
Total financial liabilities, book value | [2] | 4,694,957 |  | 3,738,269 |
Debentures [Member] | Financial liabilities at amortised cost, class [member] |  |  |  |  |
IfrsStatementLineItems [Line Items] |  |  |  |  |
Total financial liabilities, fair value | [3] | 7,688,396 |  | 8,240,769 |
Total financial liabilities, book value | [3] | 7,887,077 |  | 8,240,769 |
Accounts Payable Related To Concession [Member] | Financial liabilities at amortised cost, class [member] |  |  |  |  |
IfrsStatementLineItems [Line Items] |  |  |  |  |
Total financial liabilities, fair value | [4] | 1,051,710 |  | 1,009,867 |
Total financial liabilities, book value | [4] | 937,542 |  | 903,959 |
Fair Value In The Purchase And Sale Of Power [Member] | Level 3 of fair value hierarchy [member] | Financial liabilities at fair value through profit or loss, category [member] |  |  |  |  |
IfrsStatementLineItems [Line Items] |  |  |  |  |
Total financial liabilities, fair value | [5] | 738,703 |  | 545,468 |
Total financial liabilities, book value | [5] | 738,703 |  | 545,468 |
Financial assets at fair value through profit or loss, category [member] |  |  |  |  |
IfrsStatementLineItems [Line Items] |  |  |  |  |
Total financial liabilities, book value |  | 5,728,351 |  | 6,248,524 |
Total financial assets, fair value |  | 5,728,351 |  | 6,248,524 |
Financial assets at fair value through profit or loss, category [member] | Copel Energia | Level 1 of fair value hierarchy [member] |  |  |  |  |
IfrsStatementLineItems [Line Items] |  |  |  |  |
Total financial liabilities, book value | [1] | 2,678,457 |  | 3,472,845 |
Total financial assets, fair value | [1] | 2,678,457 |  | 3,472,845 |
Financial assets at fair value through profit or loss, category [member] | Bonds And Securities One [Member] | Level 1 of fair value hierarchy [member] |  |  |  |  |
IfrsStatementLineItems [Line Items] |  |  |  |  |
Total financial liabilities, book value | [6] | (0) |  | 14,571 |
Total financial assets, fair value | [6] | (0) |  | 14,571 |
Financial assets at fair value through profit or loss, category [member] | Renegotiation of hydrological risk - GSF | Level 2 of fair value hierarchy [member] |  |  |  |  |
IfrsStatementLineItems [Line Items] |  |  |  |  |
Total financial liabilities, book value | [6] | 431,056 |  | 346,487 |
Total financial assets, fair value | [6] | 431,056 |  | 346,487 |
Financial assets at fair value through profit or loss, category [member] | Accounts Receivable Related To The Distribution Concession [Member] | Level 3 of fair value hierarchy [member] |  |  |  |  |
IfrsStatementLineItems [Line Items] |  |  |  |  |
Total financial liabilities, book value | [7] | 1,442,819 |  | 1,433,734 |
Total financial assets, fair value | [7] | 1,442,819 |  | 1,433,734 |
Financial assets at fair value through profit or loss, category [member] | Accounts Receivable Related To The Generation Concession [Member] | Level 3 of fair value hierarchy [member] |  |  |  |  |
IfrsStatementLineItems [Line Items] |  |  |  |  |
Total financial liabilities, book value | [7] | 68,642 |  | 102,220 |
Total financial assets, fair value | [7] | 68,642 |  | 102,220 |
Financial assets at fair value through profit or loss, category [member] | Regulatory charges | Level 3 of fair value hierarchy [member] |  |  |  |  |
IfrsStatementLineItems [Line Items] |  |  |  |  |
Total financial liabilities, book value | [5] | (0) |  | 2,907 |
Total financial assets, fair value | [5] |  |  | 2,907 |
Financial assets at fair value through profit or loss, category [member] | Fair Value In The Purchase And Sale Of Power In The Active Market [Member] | Level 3 of fair value hierarchy [member] |  |  |  |  |
IfrsStatementLineItems [Line Items] |  |  |  |  |
Total financial liabilities, book value | [5] | 1,081,758 |  | 855,775 |
Total financial assets, fair value | [5] | 1,081,758 |  | 855,775 |
Financial assets at fair value through profit or loss, category [member] | Contract11Member | Level 1 of fair value hierarchy [member] |  |  |  |  |
IfrsStatementLineItems [Line Items] |  |  |  |  |
Total financial liabilities, book value | [8] | 15,372 |  | 14,072 |
Total financial assets, fair value | [8] | 15,372 |  | 14,072 |
Financial assets at fair value through profit or loss, category [member] | Eletrobras | Level 2 of fair value hierarchy [member] |  |  |  |  |
IfrsStatementLineItems [Line Items] |  |  |  |  |
Total financial liabilities, book value | [8] | 10,247 |  | 5,913 |
Total financial assets, fair value | [8] | 10,247 |  | 5,913 |
Financial assets at amortised cost, category [member] |  |  |  |  |
IfrsStatementLineItems [Line Items] |  |  |  |  |
Total financial liabilities, book value |  | 4,600,256 |  | 6,156,703 |
Total financial assets, fair value |  | 4,700,077 |  | 6,227,404 |
Financial assets at amortised cost, category [member] | Collaterals And Escrow Accounts [Member] |  |  |  |  |
IfrsStatementLineItems [Line Items] |  |  |  |  |
Total financial liabilities, book value | [1] | 157 |  | 182 |
Total financial assets, fair value | [1] | 157 |  | 182 |
Financial assets at amortised cost, category [member] | Collaterals And Escrow Accounts 1 [Member] |  |  |  |  |
IfrsStatementLineItems [Line Items] |  |  |  |  |
Total financial liabilities, book value |  |  |  | 142,764 |
Total financial assets, fair value |  |  |  | 115,643 |
Financial assets at amortised cost, category [member] | Trade Accounts Receivable Financial Assets [Member] |  |  |  |  |
IfrsStatementLineItems [Line Items] |  |  |  |  |
Total financial liabilities, book value | [1] | 3,451,869 |  | 4,515,426 |
Total financial assets, fair value | [1] | 3,451,869 |  | 4,515,426 |
Financial assets at amortised cost, category [member] | Sectorial financial assets [Member] |  |  |  |  |
IfrsStatementLineItems [Line Items] |  |  |  |  |
Total financial liabilities, book value | [1] | 381,398 |  | 767,480 |
Total financial assets, fair value | [1] | 381,398 |  | 767,480 |
Financial assets at amortised cost, category [member] | Statement Table |  |  |  |  |
IfrsStatementLineItems [Line Items] |  |  |  |  |
Total financial liabilities, book value | [9] | 766,832 |  | 730,851 |
Total financial assets, fair value | [9] | 866,653 |  | 828,673 |
Fair Value Through Other Comprehensive Income [Member] |  |  |  |  |
IfrsStatementLineItems [Line Items] |  |  |  |  |
Total financial liabilities, book value |  | 10,295 |  | (0) |
Total financial liabilities, fair value |  | 10,295 |  | (0) |
Fair Value Through Other Comprehensive Income [Member] | Certified Emission Reductions [Member] |  |  |  |  |
IfrsStatementLineItems [Line Items] |  |  |  |  |
Total financial liabilities, book value |  | 10,295 | [10] | (0) | [4]
Total financial liabilities, fair value |  | R$ 10,295 | [10] | R$ (0) | [4]
[1] | Equivalent to their respective book values due to their nature and terms of realization.
[2] | The cost of the highest value of the last funding carried out by the Company, CDI + spread of 1.22%, is used as a basic assumption for the discount of the expected payment flows.
[3] | Calculated according to the quotation of the last trade in the secondary market through the average price of the Unit Price - PU on December 31, 2022, obtained from the Brazilian Association of Financial and Capital Market Entities - Anbima.
[4] | The actual pre-tax discount rate of 8.65% p.a. was used, compatible with the rate estimated by the Company for long-term projects.
[5] | The fair values of assets and liabilities are equivalent to their book values (Note 4.15).
[6] | Fair value is calculated based on information made available by the financial agents and the market values of the bonds issued by the Brazilian government
[7] | Financial assets with fair values ​​similar to book values ​​(Note 4.4).
[8] | Investments in other companies, stated at fair value, which is calculated according to the price quotations published in an active market, for assets classified as level 1 and determined in view of the comparative assessment model for assets classified as level 2.
[9] | Receivables related to the concession agreement for providing electricity generation services under quota arrangements, having their fair value calculated by expected cash inflows, discounted at the rate established by Aneel auction notice 12/2015 (9.04%).
[10] | Financial assets with fair values ​​similar to book values ​​(Note 4.2).

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- Definition The amount of assets that are: (a) cash; (b) an equity instrument of another entity; (c) a contractual right: (i) to receive cash or another financial asset from another entity; or (ii) to exchange financial assets or financial liabilities with another entity under conditions that are potentially favourable to the entity; or (d) a contract that will, or may be, settled in the entity’s own equity instruments and is: (i) a non-derivative for which the entity is, or may be, obliged to receive a variable number of the entity’s own equity instruments; or (ii) a derivative that will, or may be, settled other than by the exchange of a fixed amount of cash or another financial asset for a fixed number of the entity’s own equity instruments. For this purpose the entity’s own equity instruments do not include puttable financial instruments classified as equity instruments in accordance with paragraphs 16A-16B of IAS 32, instruments that impose on the entity an obligation to deliver to another party a pro rata share of the net assets of the entity only on liquidation and are classified as equity instruments in accordance with paragraphs 16C-16D of IAS 32, or instruments that are contracts for the future receipt or delivery of the entity’s own equity instruments. [Refer: Financial instruments, class [member]; Financial liabilities] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2022-03-24 -Paragraph 35H -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2022-en-r&anchor=para_35H&doctype=Standard -URIDate 2022-03-24 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2022-03-24 -Paragraph 35M -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2022-en-r&anchor=para_35M&doctype=Standard -URIDate 2022-03-24 Reference 3: http://www.xbrl.org/2003/role/exampleRef -Name IFRS -Number 7 -IssueDate 2022-03-24 -Paragraph 35N -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2022-en-r&anchor=para_35N&doctype=Standard -URIDate 2022-03-24 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2022-03-24 -Paragraph 35I -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2022-en-r&anchor=para_35I&doctype=Standard -URIDate 2022-03-24 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2022-03-24 -Paragraph 25 -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2022-en-r&anchor=para_25&doctype=Standard -URIDate 2022-03-24 + Details
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- Definition The amount of liabilities that are: (a) a contractual obligation: (i) to deliver cash or another financial asset to another entity; or (ii) to exchange financial assets or financial liabilities with another entity under conditions that are potentially unfavourable to the entity; or (b) a contract that will, or may be, settled in the entity’s own equity instruments and is: (i) a non-derivative for which the entity is, or may be, obliged to deliver a variable number of the entity’s own equity instruments; or (ii) a derivative that will, or may be, settled other than by the exchange of a fixed amount of cash or another financial asset for a fixed number of the entity’s own equity instruments. For this purpose, rights, options or warrants to acquire a fixed number of the entity’s own equity instruments for a fixed amount of any currency are equity instruments if the entity offers the rights, options or warrants pro rata to all of its existing owners of the same class of its own non-derivative equity instruments. Also, for those purposes the entity’s own equity instruments do not include puttable financial instruments that are classified as equity instruments in accordance with paragraphs 16A-16B of IAS 32, instruments that impose on the entity an obligation to deliver to another party a pro rata share of the net assets of the entity only on liquidation and are classified as equity instruments in accordance with paragraphs 16C-16D of IAS 32, or instruments that are contracts for the future receipt or delivery of the entity’s own equity instruments. As an exception, an instrument that meets the definition of a financial liability is classified as an equity instrument if it has all the features and meets the conditions in paragraphs 16A-16B or paragraphs 16C-16D of IAS 32. [Refer: Financial instruments, class [member]; Financial assets; Derivatives [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2022-03-24 -Paragraph 25 -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2022-en-r&anchor=para_25&doctype=Standard -URIDate 2022-03-24 + Details
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