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32 Operating Costs and Expenses (Details 5) - BRL (R$) R$ in Thousands | 12 Months Ended
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Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Disclosure of operating costs and expenses [line items] |  |  |
Construction cost | R$ 1,091,396 | R$ 1,052,208 | R$ 1,003,881
Materials And Supplies [Member] |  |  |
Disclosure of operating costs and expenses [line items] |  |  |
Construction cost | 548,336 | 507,899 | 387,278
Third-Party Services [Member] |  |  |
Disclosure of operating costs and expenses [line items] |  |  |
Construction cost | 395,607 | 400,680 | 437,788
Personnel [Member] |  |  |
Disclosure of operating costs and expenses [line items] |  |  |
Construction cost | 125,777 | 124,469 | 143,266
Others [Member] |  |  |
Disclosure of operating costs and expenses [line items] |  |  |
Construction cost | R$ 21,676 | R$ 19,160 | R$ 35,549

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- Definition The amount refers to construction costs. + References No definition available. + Details
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Namespace Prefix: | elp_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Operating Costs And Expenses [Line Items] + References No definition available. + Details
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Namespace Prefix: | elp_
Data Type: | xbrli:stringItemType
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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: | elp_TypeOfExpenseAxis=elp_ThirdPartyServicesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | elp_TypeOfExpenseAxis=elp_PersonnelMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | elp_TypeOfExpenseAxis=elp_OthersMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |