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17 Property, Plant and Equipment (Details Narrative) R$ / shares in Units, R$ in Thousands | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2019 BRL (R$) MW | Dec. 31, 2018 BRL (R$) MW | Nov. 28, 2014 R$ / shares | Oct. 31, 2014 R$ / shares
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |
Borrowings and debentures | R$ | R$ 4,295 | R$ 4,229 |  |
Average interest rate | 0.11% | 0.11% |  |
Total investment | R$ | R$ 2,523,179 | R$ 2,368,234 |  |
Cutia and Bento Miguel Wind Farms [Member] |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |
Pre-tax discount rate | 7.24% | 7.13% |  |
Power Plants Of Parana [Member] |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |
Pre-tax discount rate | 5.45% | 5.36% |  |
HPP Colider [Member] |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |
Pre-tax discount rate | 5.45% | 5.36% |  |
Cutia Complex [Member] |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |
Auction final price per megawatt hour | R$ / shares |  |  |  | R$ 144.00
Restated price due to variation of IPCA | 180.6 |  |  |
Revision of assured power of project | MW | 71.4 |  |  |
Installed capacity of hydroelectric plant | MW | 86 |  |  |
Bento Miguel Complex [Member] |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |
Auction final price per megawatt hour | R$ / shares |  |  | R$ 142.03 |
Restated price due to variation of IPCA |  | 179.84 |  |
Revision of assured power of project | MW |  | 54.8 |  |
Installed capacity of hydroelectric plant | MW |  | 132.3 |  |
Copel [Member] |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |
Pre-tax discount rate | 6.57% |  |  |
Impairment losses | R$ | R$ 87,399 |  |  |
Write-offs | R$ | R$ 124,067 |  |  |

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