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Schedule of detailed information about concession contract assets (Details) - BRL (R$) R$ in Millions | Dec. 31, 2021 | Dec. 31, 2020
--- | --- | ---
IfrsStatementLineItems [Line Items] |  |
Contract assets | R$ 6,380 | R$ 4,980
Current contract assets | 600 | 737
Non-current contract assets | 5,780 | 4,243
Restated 1 [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Current contract assets | 600 | 737
Non-current contract assets | 5,780 | 4,243
Distribution Infrastructure Assets Under Construction [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Contract assets | 1,927 | 1,142
Gas Infrastructure Assets Under Construction [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Contract assets | 95 | 94
National Grid [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Contract assets | 2,011 | 1,896
Transmission Indemnity Assets Incorporated Into The Assets Remuneration Base [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Contract assets | R$ 2,347 | R$ 1,848

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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 2021-01-01 -Paragraph 105 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=15&code=ifrs-tx-2021-en-r&anchor=para_105&doctype=Standard -URIDate 2021-03-24 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 15 -IssueDate 2021-01-01 -Paragraph 116 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=15&code=ifrs-tx-2021-en-r&anchor=para_116_a&doctype=Standard -URIDate 2021-03-24 + 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 2021-01-01 -Paragraph 105 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=15&code=ifrs-tx-2021-en-r&anchor=para_105&doctype=Standard -URIDate 2021-03-24 + 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 2021-01-01 -Paragraph 105 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=15&code=ifrs-tx-2021-en-r&anchor=para_105&doctype=Standard -URIDate 2021-03-24 + Details
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