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27 Right-of-use asset and lease liability (Details 2) R$ in Thousands	Dec. 31, 2019 BRL (R$)
Right of Use Asset And Lease Liability [Abstract]
2021	R$ 22,734
2022	23,251
2023	8,285
2024	9,814
2025	1,252
After 2025	130
Maturity of noncurrent installments	65,466
Embedded interest	(2,435)
Lease Liabilities balance	R$ 63,031

X

- Definition

The amount of liabilities related to embedded interest.

+ References

No definition available.

+ Details

Name:	elp_EmbeddedInterest
Namespace Prefix:	elp_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

The amount of liabilities related to the entity's leases. Lease is a contract, or part of a contract, that conveys the right to use an underlying asset for a period of time in exchange for consideration.

+ References

No definition available.

+ Details

Name:	elp_LeaseLiabilities1
Namespace Prefix:	elp_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Amount of lessee's undiscounted obligation for lease payment for paid in third fiscal year following current fiscal year.

+ References

No definition available.

+ Details

Name:	elp_LesseePaymentsDueAfterYearFive
Namespace Prefix:	elp_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Amount of lessee's undiscounted obligation for lease payment for paid in next fiscal year following current fiscal year.

+ References

No definition available.

+ Details

Name:	elp_LesseePaymentsDueNextTwelveMonths
Namespace Prefix:	elp_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Amount of lessee's undiscounted obligation for lease payment for paid in third fiscal year following current fiscal year.

+ References

No definition available.

+ Details

Name:	elp_LesseePaymentsDueYearFive
Namespace Prefix:	elp_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Amount of lessee's undiscounted obligation for lease payment for paid in third fiscal year following current fiscal year.

+ References

No definition available.

+ Details

Name:	elp_LesseePaymentsDueYearFour
Namespace Prefix:	elp_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Amount of lessee's undiscounted obligation for lease payment for paid in third fiscal year following current fiscal year.

+ References

No definition available.

+ Details

Name:	elp_LesseePaymentsDueYearThree
Namespace Prefix:	elp_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Amount of lessee's undiscounted obligation for lease payment for paid in second fiscal year following current fiscal year.

+ References

No definition available.

+ Details

Name:	elp_LesseePaymentsDueYearTwo
Namespace Prefix:	elp_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

The amount of liabilities related to maturity of noncurrent installments.

+ References

No definition available.

+ Details

Name:	elp_MaturityOfNoncurrentInstallments
Namespace Prefix:	elp_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- References

No definition available.

+ Details

Name:	elp_RightofuseAssetAndLeaseLiabilityAbstract
Namespace Prefix:	elp_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration