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11 Contract assets (Details) - BRL (R$) R$ in Thousands | Dec. 31, 2020 | Dec. 31, 2019 | Jan. 02, 2019 | Dec. 31, 2018
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SummaryOfContractAssetsLineItems [Line Items] |  |  |  |
Contract Assets | R$ 5,492,797 | R$ 4,790,653 | R$ 4,187,056 |
Current | 285,682 |  |  |
Noncurrent | 5,207,115 |  |  |
Restated [Member] |  |  |  |
SummaryOfContractAssetsLineItems [Line Items] |  |  |  |
Current |  | 161,740 |  | R$ 134,016
Noncurrent |  | 4,628,913 |  | 4,053,040
Power distribution service concession [member] |  |  |  |
SummaryOfContractAssetsLineItems [Line Items] |  |  |  |
Contract Assets | 1,114,961 | 844,284 | 640,500 | 640,500
Piped gas distribution service concession [member] |  |  |  |
SummaryOfContractAssetsLineItems [Line Items] |  |  |  |
Contract Assets | 27,254 | 26,734 | 25,718 | 25,718
Power Transmission Concession [member] |  |  |  |
SummaryOfContractAssetsLineItems [Line Items] |  |  |  |
Contract Assets | R$ 4,350,582 | R$ 3,919,635 | R$ 3,520,838 | R$ 3,520,838

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- Definition Schedule reflecting summary of contractual. + References No definition available. + Details
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- Definition The amount of an entity’s right to consideration in exchange for goods or services that the entity has transferred to a customer, when that right is conditioned on something other than the passage of time (for example, the entity’s future performance). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 15 -IssueDate 2020-01-01 -Paragraph 105 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=15&code=ifrs-tx-2020-en-r&anchor=para_105&doctype=Standard -URIDate 2020-01-01 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 15 -IssueDate 2020-01-01 -Paragraph 116 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=15&code=ifrs-tx-2020-en-r&anchor=para_116_a&doctype=Standard -URIDate 2020-01-01 + Details
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- Definition The amount of current contract assets. [Refer: Contract assets] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 15 -IssueDate 2020-01-01 -Paragraph 105 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=15&code=ifrs-tx-2020-en-r&anchor=para_105&doctype=Standard -URIDate 2020-01-01 + Details
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- Definition The amount of non-current contract assets. [Refer: Contract assets] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 15 -IssueDate 2020-01-01 -Paragraph 105 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=15&code=ifrs-tx-2020-en-r&anchor=para_105&doctype=Standard -URIDate 2020-01-01 + Details
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- Details
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- Details
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- Details
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- Details
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