2 Concessions and Authorizations (Details 1) - BRL (R$) R$ in Thousands	12 Months Ended
Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Jan. 02, 2019
Disclosure of detailed information about service concession arrangements [line items]
Accounts receivable related to the concession	R$ 1,902,340	R$ 1,878,369		R$ 1,796,865
Intangible assets	6,929,456	6,332,611
Amortization	(372)	372
Compagas balances [member]
Disclosure of detailed information about service concession arrangements [line items]
Accounts receivable related to the concession	189,416	144,813	R$ 148,720
Intangible assets	102,627	127,598	152,538
Fair value of assets from the indemnity for the concession	34,591	9,181	9,184
Amortization	(29,442)	(28,854)	(29,012)
Adjustments [member]
Disclosure of detailed information about service concession arrangements [line items]
Accounts receivable related to the concession		179,572	199,257
Intangible assets	29,739	(127,598)	(148,919)
Fair value of assets from the indemnity for the concession	(22,437)	1,234	3,009
Amortization	199	400	6,253
Copel balances [member]
Disclosure of detailed information about service concession arrangements [line items]
Accounts receivable related to the concession	189,416	324,385	347,977
Intangible assets	132,366		3,619
Fair value of assets from the indemnity for the concession	12,154	10,415	12,193
Amortization	R$ (29,243)	R$ (28,454)	R$ (22,759)

The amount refers to fair value of assets from indemnity for concession.

No definition available.

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

- Definition

The amount of amortisation expense. Amortisation is the systematic allocation of depreciable amounts of intangible assets over their useful lives.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 1
-IssueDate 2020-01-01
-Paragraph 112
-Subparagraph c
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2020-en-r&anchor=para_112_c&doctype=Standard
-URIDate 2020-01-01

+ Details

Name:	ifrs-full_AmortisationExpense
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes of the table.

+ References

No definition available.

+ Details

Name:	ifrs-full_DisclosureOfServiceConcessionArrangementsLineItems
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

The amount of identifiable non-monetary assets without physical substance. This amount does not include goodwill. [Refer: Goodwill]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 38
-IssueDate 2020-01-01
-Paragraph 118
-Subparagraph e
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=38&code=ifrs-tx-2020-en-r&anchor=para_118_e&doctype=Standard
-URIDate 2020-01-01

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 1
-IssueDate 2020-01-01
-Paragraph 54
-Subparagraph c
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2020-en-r&anchor=para_54_c&doctype=Standard
-URIDate 2020-01-01

+ Details

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

- Definition

The amount receivable by the entity that it does not separately disclose in the same statement or note.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-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_OtherReceivables
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Details

Name:	ifrs-full_ServiceConcessionArrangementsAxis=elp_CompagasBalancesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_ServiceConcessionArrangementsAxis=elp_AdjustmentsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_ServiceConcessionArrangementsAxis=elp_CopelBalancesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: