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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, 2019 | Dec. 31, 2018
CRC Transferred To Parana State Government [Abstract] |  |
Changes in CRC, beginning | R$ 1,445,042 | R$ 1,516,362
Interest | 87,710 | 93,009
Monetary variations | 96,519 | 95,788
Amortizations | (278,586) | (260,117)
Changes in CRC, ending | 1,350,685 | 1,445,042
Changes in CRC, current | 219,236 | 190,876
Changes in CRC, noncurrent | R$ 1,131,449 | R$ 1,254,166

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