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23 Post-employment Benefits (Details 13)	12 Months Ended
	Dec. 31, 2020
Unified Plan [member] | Fixed Income [member]
Disclosure of defined benefit plans [line items]
Target limit	86.50%
Minimum limit	55.00%
Unified Plan [member] | Variable Income [member]
Disclosure of defined benefit plans [line items]
Target limit	5.00%
Minimum limit	1.00%
Unified Plan [member] | Loans [member]
Disclosure of defined benefit plans [line items]
Target limit	0.50%
Minimum limit	0.00%
Unified Plan [member] | Real Estate [member]
Disclosure of defined benefit plans [line items]
Target limit	5.00%
Minimum limit	1.00%
Unified Plan [member] | Investment Structuring [member]
Disclosure of defined benefit plans [line items]
Target limit	3.00%
Minimum limit	0.00%
Unified Plan [member] | Investments Abroad [member]
Disclosure of defined benefit plans [line items]
Target limit	0.00%
Minimum limit	0.00%
Plan III [member] | Fixed Income [member]
Disclosure of defined benefit plans [line items]
Target limit	51.00%
Minimum limit	23.00%
Plan III [member] | Variable Income [member]
Disclosure of defined benefit plans [line items]
Target limit	14.00%
Minimum limit	8.00%
Plan III [member] | Loans [member]
Disclosure of defined benefit plans [line items]
Target limit	3.00%
Minimum limit	1.00%
Plan III [member] | Real Estate [member]
Disclosure of defined benefit plans [line items]
Target limit	10.00%
Minimum limit	0.00%
Plan III [member] | Investment Structuring [member]
Disclosure of defined benefit plans [line items]
Target limit	16.00%
Minimum limit	0.00%
Plan III [member] | Investments Abroad [member]
Disclosure of defined benefit plans [line items]
Target limit	6.00%
Minimum limit	0.00%

X

- Definition

Percentage of target investment allocation to total plan assets. Includes, but is not limited to, percentage on weighted-average basis if more than one maximum limit plan.

+ References

No definition available.

+ Details

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Namespace Prefix:	elp_
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Balance Type:	na
Period Type:	duration

X

- Definition

Percentage of target investment allocation to total plan assets. Includes, but is not limited to, percentage on weighted-average basis if more than one plan.

+ References

No definition available.

+ Details

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Namespace Prefix:	elp_
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Balance Type:	na
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X

- 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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- Details

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Namespace Prefix:
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X

- Details

Name:	elp_PlanAssetCategoriesAxis=elp_FixedIncomeMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	elp_PlanAssetCategoriesAxis=elp_VariableIncomeMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	elp_PlanAssetCategoriesAxis=elp_LoansAllocationMember
Namespace Prefix:
Data Type:	na
Balance Type:
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X

- Details

Name:	elp_PlanAssetCategoriesAxis=elp_RealEstateAllocationMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	elp_PlanAssetCategoriesAxis=elp_InvestmentStructuringMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	elp_PlanAssetCategoriesAxis=elp_ForeignInvestmentsAbroadMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_CharacteristicsOfDefinedBenefitPlansAxis=elp_PlanIIIMember
Namespace Prefix:
Data Type:	na
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X

- Details

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Namespace Prefix:
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