10 Accounts Receivables - Concessions (Details 1) - Power distribution service concession [member] - BRL (R$) R$ in Thousands	12 Months Ended
Dec. 31, 2020	Dec. 31, 2019
Accounts Receivable Concessions [Line Items]
Balance at beginning	R$ 836,818	R$ 783,023
Transfers from contract assets	86,154	28,987
Transfers from investments	(99)	348
Transfers to other receivables (assets held for disposal)	(7,428)	(1,578)
Fair value recognition	45,187	26,231
Incorporations		(75)
Loss on disposal	(114)	(118)
Balance at ending	R$ 960,518	R$ 836,818

Line items represent accounr=ts receivale concession.

No definition available.

Name:	elp_DisclosureOfAccountsReceivableConcessionsLineItems
Namespace Prefix:	elp_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

It represents distribution concession agreement.

No definition available.

Name:	elp_DistributionConcessionAgreement
Namespace Prefix:	elp_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

It represents distribution concession agreeemnt tranfers fair value recognition.

No definition available.

Name:	elp_DistributionConcessionAgreementFairValueRecognition
Namespace Prefix:	elp_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

The amount of distribution concesion agreement incorporation recognition.

No definition available.

Name:	elp_DistributionConcessionAgreementIncorporationRecognition
Namespace Prefix:	elp_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

It represents distribution concession agreeemnt of loss on disposal.

No definition available.

Name:	elp_DistributionConcessionAgreementLossOnDisposal
Namespace Prefix:	elp_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

It represents distribution concession agreeemnt tranfers from investments.

No definition available.

Name:	elp_DistributionConcessionAgreementTransferFromInvestments
Namespace Prefix:	elp_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

It represents distribution concession agreeemnt tranfers from intangible assets.

No definition available.

Name:	elp_DistributionConcessionAgreementTransfersFromIntangibleAssets
Namespace Prefix:	elp_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

Amount represents the transfers from contract assets.

No definition available.

Name:	elp_TransfersFromContractAssets
Namespace Prefix:	elp_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

Name:	ifrs-full_ClassesOfAssetsAxis=elp_PowerDistributionServiceConcessionMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: