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8 CRC Transferred to the Parana State Government (Details) - BRL (R$) R$ in Thousands | 12 Months Ended
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Dec. 31, 2020 | Dec. 31, 2019
CRC Transferred To Parana State Government [Abstract] |  |
Changes in CRC, beginning | R$ 1,350,685 | R$ 1,445,042
Interest | 80,788 | 87,710
Monetary variations | 261,176 | 96,519
Amortizations | (300,025) | (278,586)
Changes in CRC, ending | 1,392,624 | 1,350,685
Changes in CRC, current | 287,789 | 219,236
Changes in CRC, noncurrent | R$ 1,104,835 | R$ 1,131,449

X
- References No definition available. + Details
Name: | elp_CrcTransferredToParanaStateGovernmentAbstract
Namespace Prefix: | elp_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The amount of crc transferred to state government. + References No definition available. + Details
Name: | elp_CrcTransferredToStateGovernment
Namespace Prefix: | elp_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The amount of crc transferred to state government amortizations. + References No definition available. + Details
Name: | elp_CrcTransferredToStateGovernmentAmortizations
Namespace Prefix: | elp_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The amount of crc transferred to state government current. + References No definition available. + Details
Name: | elp_CrcTransferredToStateGovernmentCurrent
Namespace Prefix: | elp_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The amount of crc transferred to state government interest. + References No definition available. + Details
Name: | elp_CrcTransferredToStateGovernmentInterest
Namespace Prefix: | elp_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The amount of crc transferred to state government monetary variations. + References No definition available. + Details
Name: | elp_CrcTransferredToStateGovernmentMonetaryVariations
Namespace Prefix: | elp_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The amount of crc transferred to state government noncurrent. + References No definition available. + Details
Name: | elp_CrcTransferredToStateGovernmentNoncurrent
Namespace Prefix: | elp_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant