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Schedule of net operating revenue (Details) - BRL (R$) R$ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
IfrsStatementLineItems [Line Items] |  |  |
Gross revenues | R$ 35,325,211 | R$ 18,633,249 | R$ 15,869,245
PIS/Pasep and Cofins | (2,839,713) |  |
ICMS (VAT) | (4,984,945) |  |
[custom:RegulatoryCharges] | (3,508,757) |  |
[custom:NetRevenue] | 23,984,287 |  |
Service tax | (7,509) |  |
Electricity Sales To Final Customers [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Gross revenues | 12,296,456 | 6,652,824 | 6,426,016
PIS/Pasep and Cofins | (909,527) |  |
ICMS (VAT) | (2,465,992) |  |
[custom:RegulatoryCharges] | (1,683,260) |  |
[custom:NetRevenue] | 7,237,677 |  |
Electricity Sales To Distributors [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Gross revenues | 7,034,152 | 3,779,830 | 2,865,866
PIS/Pasep and Cofins | (885,904) |  |
ICMS (VAT) | (22,121) |  |
[custom:RegulatoryCharges] | (74,273) |  |
[custom:NetRevenue] | 6,051,854 |  |
Use Of The Main Distribution And Transmission Grid [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Gross revenues | 10,088,231 | 4,372,596 | 4,138,771
PIS/Pasep and Cofins | (707,904) |  |
ICMS (VAT) | (2,334,029) |  |
[custom:RegulatoryCharges] | (1,751,224) |  |
[custom:NetRevenue] | 5,295,074 |  |
Construction Income [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Gross revenues | 1,951,559 | 1,414,067 | 1,132,884
[custom:NetRevenue] | 1,951,559 |  |
Fair Value Of Assets From The Indemnity For The Concession [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Gross revenues | 142,642 | 57,341 | 36,646
[custom:NetRevenue] | 142,642 |  |
Distribution Of Piped Gas 1 [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Gross revenues | 950,850 | 502,655 | 843,183
PIS/Pasep and Cofins | (75,357) |  |
ICMS (VAT) | (162,710) |  |
[custom:NetRevenue] | 712,267 |  |
Service tax | (516) |  |
Sectorial Financial Assets And Liabilities Result [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Gross revenues | 2,502,324 |  |
PIS/Pasep and Cofins | (231,465) |  |
Sectorial Financial Assets And Liabilities Result 2 [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Gross revenues |  | 676,939 | 18,631
[custom:NetRevenue] | 2,270,859 |  |
Other Operating Revenue [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Gross revenues | 358,997 | 366,434 | R$ 407,248
PIS/Pasep and Cofins | (29,556) |  |
ICMS (VAT) | (93) |  |
[custom:NetRevenue] | 322,355 |  |
Service tax | R$ (6,993) |  |
Recovery Of Pis Pasep And Cofins On I C M S [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Gross revenues |  | R$ 810,563 |

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