13 Taxes (Details 2) - BRL (R$) R$ in Thousands	Dec. 31, 2020	Dec. 31, 2019
DisclosureOfTaxesLineItems [Line Items]
Other current taxes recoverable	R$ 1,565,323	R$ 205,060
Other noncurrent taxes recoverable	4,539,498	322,011
Other current tax obligations	490,608	501,068
Other noncurrent tax obligations	622,483	662,114
Recoverable ICMS (VAT) [member]
DisclosureOfTaxesLineItems [Line Items]
Other current taxes recoverable	89,942	103,977
Other noncurrent taxes recoverable	84,376	74,568
Recoverable PIS/Pasep and Cofins Taxes [member]
DisclosureOfTaxesLineItems [Line Items]
Other current taxes recoverable	1,474,119	98,942
Other noncurrent taxes recoverable	4,421,403	213,667
Other Recoverable Taxes [member]
DisclosureOfTaxesLineItems [Line Items]
Other current taxes recoverable	1,262	2,141
Other noncurrent taxes recoverable	33,719	33,776
ICMS (VAT) payable [member]
DisclosureOfTaxesLineItems [Line Items]
Other current tax obligations	201,138	179,662
PIS/Pasep and Cofins Payable [member]
DisclosureOfTaxesLineItems [Line Items]
Other current tax obligations	179,133	125,197
IRRF on JSCP [member]
DisclosureOfTaxesLineItems [Line Items]
Other current tax obligations	43,950	117,807
Special Tax Regularization Program - Pert [member]
DisclosureOfTaxesLineItems [Line Items]
Other current tax obligations	50,565	49,310
Ordinary Financing of Taxes With The Federal Tax Authorities [member]
DisclosureOfTaxesLineItems [Line Items]
Other current tax obligations		18,063
Other Taxes [member]
DisclosureOfTaxesLineItems [Line Items]
Other current tax obligations	15,822	11,029
Social Security Contributions - Injunction on Judicial Deposit [member]
DisclosureOfTaxesLineItems [Line Items]
Other noncurrent tax obligations	209,145	209,747
Special Tax Regularization Program - Pert [member]
DisclosureOfTaxesLineItems [Line Items]
Other noncurrent tax obligations	408,738	447,897
Other Taxes [member]
DisclosureOfTaxesLineItems [Line Items]
Other noncurrent tax obligations	R$ 4,600	R$ 4,470

No definition available.

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

- Definition

The amount of current payables on social security and taxes other than incomes tax. [Refer: Payables on social security and taxes other than income tax]

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 1
-IssueDate 2020-01-01
-Paragraph 78
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2020-en-r&anchor=para_78&doctype=Standard
-URIDate 2020-01-01

+ Details

Name:	ifrs-full_CurrentPayablesOnSocialSecurityAndTaxesOtherThanIncomeTax
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The amount of current receivables from taxes other than income tax. [Refer: Receivables from taxes other than income tax]

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 1
-IssueDate 2020-01-01
-Paragraph 78
-Subparagraph b
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2020-en-r&anchor=para_78_b&doctype=Standard
-URIDate 2020-01-01

+ Details

Name:	ifrs-full_CurrentReceivablesFromTaxesOtherThanIncomeTax
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

The amount of non-current payables on social security and taxes other than incomes tax. [Refer: Payables on social security and taxes other than income tax]

+ References

+ Details

Name:	ifrs-full_NoncurrentPayablesOnSocialSecurityAndTaxesOtherThanIncomeTax
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The amount of non-current receivables from taxes other than income tax. [Refer: Receivables from taxes other than income tax]

+ References

+ Details

Name:	ifrs-full_NoncurrentReceivablesFromTaxesOtherThanIncomeTax
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Details

Name:	ifrs-full_AssetsAndLiabilitiesAxis=elp_RecoverableICMSMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_AssetsAndLiabilitiesAxis=elp_RecoverablePISPasepAndCofinsTaxesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_AssetsAndLiabilitiesAxis=elp_OtherRecoverableTaxesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_AssetsAndLiabilitiesAxis=elp_ICMSVATPayableMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_AssetsAndLiabilitiesAxis=elp_PISPasepAndCofinsPayableMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_AssetsAndLiabilitiesAxis=elp_IRRFOnJSCPMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_AssetsAndLiabilitiesAxis=elp_SpecialTaxRegularizationProgramPertMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_AssetsAndLiabilitiesAxis=elp_OrdinaryFinancingOfTaxesWithTheFederalTaxAuthoritiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_AssetsAndLiabilitiesAxis=elp_OtherTaxesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_AssetsAndLiabilitiesAxis=elp_SocialSecurityContributionsInjunctionOnJudicialDepositMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_AssetsAndLiabilitiesAxis=elp_SpecialTaxRegularizationProgramPertOneMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_AssetsAndLiabilitiesAxis=elp_OtherTaxesOneMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: