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39 Additional information to the Statement of Cash Flows (Details Narrative) - BRL (R$) R$ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
AdditionalInformationToStatementOfCashFlowsLineItems [Line Items] |  |  |
Contract Assets | R$ 1,039,234 | R$ 813,450 | R$ 778,386
Investment for future capital increase | 267,471 | 87,781 |
Property, plant and equipment acquisitions | 551,162 | 1,455,318 | 1,318,336
Right-of-use assets | 92,831 |  |
Purchases Made in Installments and Not Settled [Member] |  |  |
AdditionalInformationToStatementOfCashFlowsLineItems [Line Items] |  |  |
Contract Assets | 48,068 | 50,927 | 30,312
Property, plant and equipment acquisitions | 52,446 | R$ 71,454 | R$ 123,268
Foz Do Chopim Energetica Ltda [Member] |  |  |
AdditionalInformationToStatementOfCashFlowsLineItems [Line Items] |  |  |
Investment for future capital increase | R$ 19,461 |  |

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- Definition The amount of assets that represent a lessee's right to use an underlying asset for the lease term. Underlying asset is an asset that is the subject of a lease, for which the right to use that asset has been provided by a lessor to a lessee. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 16 -IssueDate 2019-01-01 -Paragraph 53 -Subparagraph j -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=16&code=ifrs-tx-2019-en-r&anchor=para_53_j&doctype=Standard -URIDate 2019-03-27 + Details
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