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v3.20.1

23 Post-employment benefits (Details 9) R$ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2020 BRL (R$)
Plan III [Member] |
Disclosure of defined benefit plans [line items] |
Cost of current service | R$ 4,037
Estimated cost of interest | 183,865
Expected return on plan assets | (183,026)
Expected employee contributions | (2,018)
Costs (income or loss) | 2,858
Assistance Plan [Member] |
Disclosure of defined benefit plans [line items] |
Cost of current service | 20,854
Estimated cost of interest | 85,561
Expected return on plan assets | (12,066)
Expected employee contributions |
Costs (income or loss) | 94,349
Unified Plan [Member] |
Disclosure of defined benefit plans [line items] |
Cost of current service | 765
Estimated cost of interest | 405,370
Expected return on plan assets | (449,905)
Expected employee contributions | (187)
Costs (income or loss) | R$ (43,957)

X
- Definition Amount of employees contributions in net periodic defined benefit plan. + References No definition available. + Details
Name: | elp_NetPeriodicDefinedBenefitPlanExpectedReturnOnPlanAssets
Namespace Prefix: | elp_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of expected return (loss) recognized in net periodic defined benefit plan. + References No definition available. + Details
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Namespace Prefix: | elp_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of cost recognized for passage of time related to net periodic defined benefit plan. + References No definition available. + Details
Name: | elp_NetPeriodicDefinedBenefitPlanInterestCost
Namespace Prefix: | elp_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of net periodic benefit cost (credit) for periodic defined benefit plan. + References No definition available. + Details
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Namespace Prefix: | elp_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of cost for actuarial present value of benefits attributed to service rendered by employee for net periodic defined benefit plan. + References No definition available. + Details
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Namespace Prefix: | elp_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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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Period Type: | duration

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

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

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