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v3.20.1

23 Post-employment benefits (Details 14) - shares | Dec. 31, 2019 | Dec. 31, 2018
--- | --- | ---
Unified Plan [Member] |  |
Disclosure of defined benefit plans [line items] |  |
Debentures |  |
Shares |  | 5
Defined benefit pension plan securities |  | 5
Plan III [Member] |  |
Disclosure of defined benefit plans [line items] |  |
Debentures |  | 4,166
Shares |  | 13
Defined benefit pension plan securities |  | 4,179

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- Definition The amount refers to defined benefit pension plan debentures. + References No definition available. + Details
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Namespace Prefix: | elp_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

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- Definition The amount refers to defined benefit pension plan securities. + References No definition available. + Details
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Namespace Prefix: | elp_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

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- Definition The amount refers to defined benefit pension plan shares. + References No definition available. + Details
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Namespace Prefix: | elp_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

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

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | ifrs-full_CharacteristicsOfDefinedBenefitPlansAxis=elp_PlanIIIMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |