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27 Right-of-use asset and lease liability (Details 1) R$ in Thousands	12 Months Ended
	Dec. 31, 2019 BRL (R$)
Right of Use Asset And Lease Liability [Abstract]
Initial adoption on beginning	R$ 118,022
Additions	9,353
Remeasurement Adjustment	3,884
Charges	9,675
Amortization - principal	(30,946)
Payment - charges	(9,130)
Disposals	(4,254)
Initial adoption on end	R$ 96,604

X

- Definition

The amount of changes in lease liability from amortization.

+ References

No definition available.

+ Details

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

X

- Definition

The amount of changes in lease liability charges.

+ References

No definition available.

+ Details

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

X

- Definition

The amount of changes in lease liability from disposals.

+ References

No definition available.

+ Details

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

X

- Definition

The amount of changes in lease liability from payment from amortization.

+ References

No definition available.

+ Details

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

X

- References

No definition available.

+ Details

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

X

- Definition

The amount of additions to right-of-use assets. [Refer: Right-of-use assets]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 16
-IssueDate 2019-01-01
-Paragraph 53
-Subparagraph h
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=16&code=ifrs-tx-2019-en-r&anchor=para_53_h&doctype=Standard
-URIDate 2019-03-27

+ Details

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

X

- Definition

The amount of liabilities related to the entity's leases. Lease is a contract, or part of a contract, that conveys the right to use an underlying asset for a period of time in exchange for consideration.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 16
-IssueDate 2019-01-01
-Paragraph 47
-Subparagraph b
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=16&code=ifrs-tx-2019-en-r&anchor=para_47_b&doctype=Standard
-URIDate 2019-03-27

+ Details

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

X

- Definition

The increase (decrease) in the revaluation surplus that relates to right-of-use assets. [Refer: Revaluation surplus; Right-of-use assets]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 16
-IssueDate 2019-01-01
-Paragraph 57
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=16&code=ifrs-tx-2019-en-r&anchor=para_57&doctype=Standard
-URIDate 2019-03-27

+ Details

Name:	ifrs-full_RightofuseAssetsIncreaseDecreaseInRevaluationSurplus
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration