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9 Net Sectorial Financial Assets and Liabilities (Details Narrative) | 12 Months Ended
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Dec. 31, 2019
Overcontracting [Member] |
Disclosure of financial assets [line items] |
Percentage of internal tranfer limit | 105.80%

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- Definition The percentage of integral transfer limit. + References No definition available. + Details
Name: | elp_PercentageOfInternalTranferLimit
Namespace Prefix: | elp_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

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- 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_DisclosureOfFinancialAssetsLineItems
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | ifrs-full_ClassesOfFinancialAssetsAxis=elp_OvercontractingMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |