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40 Subsequent events (Details Narrative) - MW |  |  | 12 Months Ended | 13 Months Ended
--- | --- | --- | --- | ---
Mar. 17, 2020 | Mar. 03, 2020 | Dec. 31, 2019 | Mar. 24, 2020
AdditionalInformationToStatementOfCashFlowsLineItems [Line Items] |  |  |  |
Description of securites term |  |  | The term of these securities ranges from 1 to 52 months from the end of the reporting period. |
Events After Reporting Period [Member] |  |  |  |
AdditionalInformationToStatementOfCashFlowsLineItems [Line Items] |  |  |  |
Percentage of acquisition | 49.00% |  |  |
Events After Reporting Period [Member] | HPP Gov. Bento Munhoz Da Rocha Neto [Member] | Copel Geracao e Transmissao S.A. [Member] |  |  |  |
AdditionalInformationToStatementOfCashFlowsLineItems [Line Items] |  |  |  |
Description of securites term |  | 18 months |  |
Events After Reporting Period [Member] | ANELL [Member] | Bottom Of Range [member] |  |  |  |
AdditionalInformationToStatementOfCashFlowsLineItems [Line Items] |  |  |  |
Energy generating unit |  |  |  | 120
Events After Reporting Period [Member] | ANELL [Member] | Top Of Range [member] |  |  |  |
AdditionalInformationToStatementOfCashFlowsLineItems [Line Items] |  |  |  |
Energy generating unit |  |  |  | 150

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