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4 Significant Accounting Policies (Details Narrative) - BRL (R$) R$ in Thousands | 12 Months Ended
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Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Significant Accounting Policies [Abstract] |  |  |
Percentage of construction margin adopted for the transmission activity | 1.65% | 1.65% | 1.65%
Applicable tax rate | 15.00% |  |
Applicable tax rate with surtax | 10.00% |  |
Minimum amount for income tax | R$ 240 |  |
Percentage for social contribution | 9.00% |  |
lease term | 12 months |  |
Percentage of limit of taxable profit | 30.00% |  |

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- Definition Represents the information about applicable tax rate with surtax. + References No definition available. + Details
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- Definition It represents the lease term. + References No definition available. + Details
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- Definition The amount refers to minimum value for income tax. + References No definition available. + Details
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- Definition Represents the information for percentage for social contribution. + References No definition available. + Details
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- Definition Percentage of construction margin adopted for the transmission activity. + References No definition available. + Details
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- References No definition available. + Details
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- Definition The applicable income tax rate. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 12 -IssueDate 2020-01-01 -Paragraph 81 -Subparagraph c -Clause ii -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=12&code=ifrs-tx-2020-en-r&anchor=para_81_c_ii&doctype=Standard -URIDate 2020-01-01 + Details
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