10 Accounts Receivables - Concessions (Details 2) - Piped gas distribution service concession [member] - BRL (R$) R$ in Thousands	12 Months Ended
Dec. 31, 2020	Dec. 31, 2019
Accounts Receivable Concessions [Line Items]
Concession agreement - gas distribution, beginning	R$ 324,385	R$ 322,259
Transfers from contract assets	7,390	16,574
Transfers to intangible assets		(24,835)
Transfers to intangible assets	(154,483)
Fair value recognition	12,154	10,415
Loss on disposal	(30)	(28)
Concession agreement - gas distribution, ending	R$ 189,416	R$ 324,385

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

It represents distribution concession agreeement gas distribution.

No definition available.

Name:	elp_ConcessionAgreementGasDistributionTransferFromIntangibleAssets
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: