18. Property, Plant and Equipment (Details 3) - BRL (R$) R$ in Thousands	12 Months Ended
Dec. 31, 2018	Dec. 31, 2017
Disclosure of detailed information about property, plant and equipment [line items]
Property, Plant and Equipment, Depreciation	R$ (7,985,323)	R$ (7,791,147)
Property, Plant and Equipment, Impairment	14,162	(1,921)
Projects
Disclosure of detailed information about property, plant and equipment [line items]
Property, Plant and Equipment, Cost	5,350,698
Property, Plant and Equipment, Depreciation	(49,104)
Property, Plant and Equipment, Impairment	(1,201,182)
Property, Plant and Equipment, Value in use	4,100,412	5,350,698
Projects \| HPP Colíder
Disclosure of detailed information about property, plant and equipment [line items]
Property, Plant and Equipment, Cost	2,334,223
Property, Plant and Equipment, Depreciation	(2,497)
Property, Plant and Equipment, Impairment	(731,265)
Property, Plant and Equipment, Value in use	1,600,461	2,334,223
Projects \| Wind power complex Cutia
Disclosure of detailed information about property, plant and equipment [line items]
Property, Plant and Equipment, Cost	1,217,079
Property, Plant and Equipment, Depreciation	0
Property, Plant and Equipment, Impairment	(167,875)
Property, Plant and Equipment, Value in use	1,049,204	1,217,079
Projects \| Wind power complex Bento Miguel
Disclosure of detailed information about property, plant and equipment [line items]
Property, Plant and Equipment, Cost	823,045
Property, Plant and Equipment, Depreciation	0
Property, Plant and Equipment, Impairment	(84,621)
Property, Plant and Equipment, Value in use	738,424	823,045
Projects \| Consórcio Tapajós
Disclosure of detailed information about property, plant and equipment [line items]
Property, Plant and Equipment, Cost	14,464
Property, Plant and Equipment, Depreciation	0
Property, Plant and Equipment, Impairment	(14,464)
Property, Plant and Equipment, Value in use	0	14,464
Projects \| Power plants in Paraná
Disclosure of detailed information about property, plant and equipment [line items]
Property, Plant and Equipment, Cost	961,887
Property, Plant and Equipment, Depreciation	(46,607)
Property, Plant and Equipment, Impairment	(202,957)
Property, Plant and Equipment, Value in use	R$ 712,323	R$ 961,887

The amount of depreciation of property, plant and equipment. [Refer: Depreciation and amortisation expense; Property, plant and equipment]

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 16
-IssueDate 2018-01-01
-Paragraph 73
-Subparagraph e
-Clause vii
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=16&date=2018-03-01&anchor=para_73_e_vii&doctype=Standard
-URIDate 2018-03-16

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 16
-IssueDate 2018-01-01
-Paragraph 75
-Subparagraph a
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=16&date=2018-03-01&anchor=para_75_a&doctype=Standard
-URIDate 2018-03-16

+ Details

Name:	ifrs-full_DepreciationPropertyPlantAndEquipment
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	na
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_DisclosureOfPropertyPlantAndEquipmentLineItems
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

The amount of impairment loss recognised in profit or loss for property, plant and equipment. [Refer: Impairment loss recognised in profit or loss; Property, plant and equipment]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 16
-IssueDate 2018-01-01
-Paragraph 73
-Subparagraph e
-Clause v
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=16&date=2018-03-01&anchor=para_73_e_v&doctype=Standard
-URIDate 2018-03-16

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 1
-IssueDate 2018-01-01
-Paragraph 98
-Subparagraph a
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2018-03-01&anchor=para_98_a&doctype=Standard
-URIDate 2018-03-16

+ Details

Name:	ifrs-full_ImpairmentLossRecognisedInProfitOrLossPropertyPlantAndEquipment
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	na
Period Type:	duration

- Definition

The amount of property, plant and equipment, for which fair value was used as their deemed cost in the opening IFRS statement of financial position. [Refer: Property, plant and equipment]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 1
-IssueDate 2018-01-01
-Paragraph 30
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=1&date=2018-03-01&anchor=para_30&doctype=Standard
-URIDate 2018-03-16

+ Details

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

- Details

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

- Details

Name:	ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis=ELP_HPPColiderMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis=ELP_WindPowerComplexCutiaMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis=ELP_WindPowerComplexBentoMiguelMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis=ELP_ConsorcioTapajosMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis=ELP_PowerPlantsInParanaMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: