10 Accounts Receivables - Concessions (Details 2) - Piped Gas Distribution Service Concession [Member] - BRL (R$) R$ in Thousands	12 Months Ended
Dec. 31, 2019	Dec. 31, 2018
Accounts Receivable Concessions [Line Items]
Concession agreement - gas distribution, beginning	R$ 322,259	R$ 303,668
Transfers from contract assets	16,574	6,399
Reclassified from intangible assets	(24,835)
Fair value recognition	10,415	12,193
Loss on disposal	(28)	(1)
Concession agreement - gas distribution, ending	R$ 324,385	R$ 322,259

It represents distribution concession agreeement gas distribution.

No definition available.

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

It represents distribution concession agreeement gas distribution.

No definition available.

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

It represents distribution concession agreeement gas distribution.

No definition available.

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

It represents distribution concession agreeement gas distribution.

No definition available.

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

It represents distribution concession agreeement gas distribution.

No definition available.

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

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

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