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23 Post-employment Benefits (Details 9) R$ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2020 BRL (R$)
Plan III [member] |
Disclosure of defined benefit plans [line items] |
Cost of current service | R$ 4,010
Estimated cost of interest | 246,255
Expected return on plan assets | (245,291)
Expected employee contributions | 2,003
Costs (income or loss) | 2,971
Assistance Plan [member] |
Disclosure of defined benefit plans [line items] |
Cost of current service | 7,368
Estimated cost of interest | 125,133
Expected return on plan assets | (15,994)
Expected employee contributions |
Costs (income or loss) | 116,507
Unified Plan [member] |
Disclosure of defined benefit plans [line items] |
Cost of current service | 388
Estimated cost of interest | 481,656
Expected return on plan assets | (530,144)
Expected employee contributions | (136)
Costs (income or loss) | R$ (48,236)

X
- Definition Amount of employees contributions in net periodic defined benefit plan. + References No definition available. + Details
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Namespace Prefix: | elp_
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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
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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
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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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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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- Details
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Namespace Prefix: |
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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: |
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Period Type: |