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10 Accounts Receivables - Concessions (Details 3) - Bonus From The Grant Of Concession Agreements Under The Quota System [Member] - BRL (R$) R$ in Thousands | 12 Months Ended
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Dec. 31, 2019 | Dec. 31, 2018
Accounts Receivable Concessions [Line Items] |  |
Bonus from the grant, beginning | R$ 625,772 | R$ 606,479
Transfers to electricity grid use charges - customers | (69,192) | (66,693)
Interest | 91,404 | 85,986
Bonus from the grant, ending | R$ 647,984 | R$ 625,772

X
- Definition The amount represents bonus from grants. + References No definition available. + Details
Name: | elp_BonusFromTheGrant
Namespace Prefix: | elp_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The amount represents bonus from grants. + References No definition available. + Details
Name: | elp_BonusFromTheGrantInterest
Namespace Prefix: | elp_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The amount represents bonus from grants. + References No definition available. + Details
Name: | elp_BonusFromTheGrantTransfersToElectricityGridUseCharges
Namespace Prefix: | elp_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- 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

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