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10 Accounts Receivables - Concessions (Details 4) - Generation concession agreements [member] - BRL (R$) R$ in Thousands | 12 Months Ended
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Dec. 31, 2020 | Dec. 31, 2019
Accounts Receivable Concessions [Line Items] |  |
Power generation concession contract at beginning | R$ 69,182 | R$ 65,811
Gain on remeasurement of the cash flow | 1,518 | 426
Reversal of impairment | 10,502 | 2,945
Power generation concession contract at ending | R$ 81,202 | R$ 69,182

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- Definition Line items represent accounr=ts receivale concession. + References No definition available. + Details
Name: | elp_DisclosureOfAccountsReceivableConcessionsLineItems
Namespace Prefix: | elp_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition It represents power generation consession. + References No definition available. + Details
Name: | elp_PowerGenerationConcessionContract
Namespace Prefix: | elp_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition It represents power generation consession. + References No definition available. + Details
Name: | elp_PowerGenerationConcessionContractGainOnRemeasurementOfCashFlow
Namespace Prefix: | elp_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition It represents power generation consession. + References No definition available. + Details
Name: | elp_PowerGenerationConcessionContractImpairment
Namespace Prefix: | elp_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Details
Name: | ifrs-full_ClassesOfAssetsAxis=elp_GenerationConcessionAgreementsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |