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31 Net Operating Revenue (Details 1) - BRL (R$) R$ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Disclosure of net operating revenue [line items] |  |  |  |
Gross operating revenues |  | R$ 25,939,794 |  |
PIS/Pasep and Cofins |  | (1,227,978) |  |
Recovery of Pis/Pasep and Cofins on ICMS |  | (1,755,112) |  |
ICMS (VAT) |  | (4,216,720) |  |
Service tax (ISSQN) |  | (4,504) |  |
Regulatory charges |  | (1,857,343) | R$ (2,161,811) | R$ (2,457,562)
Net operating revenues |  | 18,633,249 |  |
Restated [Member] |  |  |  |
Disclosure of net operating revenue [line items] |  |  |  |
Gross operating revenues |  |  | 24,691,379 | 23,190,729
PIS/Pasep and Cofins |  |  | (2,243,383) | (2,094,148)
Recovery of Pis/Pasep and Cofins on ICMS |  |  | (105,184) |
ICMS (VAT) |  |  | (4,518,791) | (4,085,153)
Service tax (ISSQN) |  |  | (3,333) | (3,402)
Regulatory charges |  |  | (2,161,811) | (2,457,562)
Net operating revenues |  |  | 15,869,245 | 14,550,464
Electricity sales to final customers [member] |  |  |  |
Disclosure of net operating revenue [line items] |  |  |  |
Gross operating revenues |  | 9,524,897 |  |
PIS/Pasep and Cofins |  | (737,647) |  |
ICMS (VAT) |  | (1,960,998) |  |
Service tax (ISSQN) |  |  |  |
Regulatory charges |  | (173,428) |  |
Net operating revenues |  | 6,652,824 |  |
Electricity sales to final customers [member] | Residential [member] |  |  |  |
Disclosure of net operating revenue [line items] |  |  |  |
Gross operating revenues |  | 3,098,969 |  |
Electricity sales to final customers [member] | Industrial [member] |  |  |  |
Disclosure of net operating revenue [line items] |  |  |  |
Gross operating revenues |  | 970,638 |  |
Electricity sales to final customers [member] | Trade, services and other activities [member] |  |  |  |
Disclosure of net operating revenue [line items] |  |  |  |
Gross operating revenues |  | 1,701,260 |  |
Electricity sales to final customers [member] | Rural [member] |  |  |  |
Disclosure of net operating revenue [line items] |  |  |  |
Gross operating revenues |  | 613,419 |  |
Electricity sales to final customers [member] | Public entities [member] |  |  |  |
Disclosure of net operating revenue [line items] |  |  |  |
Gross operating revenues |  | 195,259 |  |
Electricity sales to final customers [member] | Public lighting [member] |  |  |  |
Disclosure of net operating revenue [line items] |  |  |  |
Gross operating revenues |  | 233,558 |  |
Electricity sales to final customers [member] | Public service [member] |  |  |  |
Disclosure of net operating revenue [line items] |  |  |  |
Gross operating revenues |  | 290,482 |  |
Electricity sales to final customers [member] | Free consumers [member] |  |  |  |
Disclosure of net operating revenue [line items] |  |  |  |
Gross operating revenues |  | 1,729,603 |  |
Electricity sales to final customers [member] | Donations and grants [member] |  |  |  |
Disclosure of net operating revenue [line items] |  |  |  |
Gross operating revenues |  | 691,709 |  |
Electricity sales to final customers [member] | Restated [Member] |  |  |  |
Disclosure of net operating revenue [line items] |  |  |  |
Gross operating revenues |  |  | 10,481,794 | 10,104,045
Net operating revenues |  |  | 6,426,016 | 5,548,584
Electricity sales to final customers [member] | Restated [Member] | Residential [member] |  |  |  |
Disclosure of net operating revenue [line items] |  |  |  |
Gross operating revenues |  |  | 3,336,432 | 3,175,290
Electricity sales to final customers [member] | Restated [Member] | Industrial [member] |  |  |  |
Disclosure of net operating revenue [line items] |  |  |  |
Gross operating revenues |  |  | 1,276,105 | 1,419,240
Electricity sales to final customers [member] | Restated [Member] | Trade, services and other activities [member] |  |  |  |
Disclosure of net operating revenue [line items] |  |  |  |
Gross operating revenues |  |  | 2,179,510 | 2,136,087
Electricity sales to final customers [member] | Restated [Member] | Rural [member] |  |  |  |
Disclosure of net operating revenue [line items] |  |  |  |
Gross operating revenues |  |  | 631,527 | 572,361
Electricity sales to final customers [member] | Restated [Member] | Public entities [member] |  |  |  |
Disclosure of net operating revenue [line items] |  |  |  |
Gross operating revenues |  |  | 279,495 | 262,705
Electricity sales to final customers [member] | Restated [Member] | Public lighting [member] |  |  |  |
Disclosure of net operating revenue [line items] |  |  |  |
Gross operating revenues |  |  | 274,250 | 278,645
Electricity sales to final customers [member] | Restated [Member] | Public service [member] |  |  |  |
Disclosure of net operating revenue [line items] |  |  |  |
Gross operating revenues |  |  | 332,414 | 316,307
Electricity sales to final customers [member] | Restated [Member] | Free consumers [member] |  |  |  |
Disclosure of net operating revenue [line items] |  |  |  |
Gross operating revenues |  |  | 1,431,274 | 1,179,314
Electricity sales to final customers [member] | Restated [Member] | Donations and grants [member] |  |  |  |
Disclosure of net operating revenue [line items] |  |  |  |
Gross operating revenues |  |  | 740,787 | 764,096
Electricity sales to distributors [member] |  |  |  |
Disclosure of net operating revenue [line items] |  |  |  |
Gross operating revenues |  | 4,330,982 |  |
PIS/Pasep and Cofins |  | (467,817) |  |
ICMS (VAT) |  | (21,637) |  |
Service tax (ISSQN) |  |  |  |
Regulatory charges |  | (61,698) |  |
Net operating revenues |  | 3,779,830 |  |
Electricity sales to distributors [member] | Bilateral contracts [member] |  |  |  |
Disclosure of net operating revenue [line items] |  |  |  |
Gross operating revenues |  | 2,386,929 |  |
Electricity sales to distributors [member] | Regulated contracts [member] |  |  |  |
Disclosure of net operating revenue [line items] |  |  |  |
Gross operating revenues |  | 916,377 |  |
Electricity sales to distributors [member] | Electric energy trade chamber CCEE [member] |  |  |  |
Disclosure of net operating revenue [line items] |  |  |  |
Gross operating revenues |  | 933,369 |  |
Electricity sales to distributors [member] | Interest [member] |  |  |  |
Disclosure of net operating revenue [line items] |  |  |  |
Gross operating revenues |  | 94,307 |  |
Electricity sales to distributors [member] | Restated [Member] |  |  |  |
Disclosure of net operating revenue [line items] |  |  |  |
Gross operating revenues |  |  | 3,301,336 | 3,136,244
Net operating revenues |  |  | 2,865,866 | 2,765,916
Electricity sales to distributors [member] | Restated [Member] | Bilateral contracts [member] |  |  |  |
Disclosure of net operating revenue [line items] |  |  |  |
Gross operating revenues |  |  | 1,998,617 | 2,002,077
Electricity sales to distributors [member] | Restated [Member] | Regulated contracts [member] |  |  |  |
Disclosure of net operating revenue [line items] |  |  |  |
Gross operating revenues |  |  | 854,239 | 385,157
Electricity sales to distributors [member] | Restated [Member] | Electric energy trade chamber CCEE [member] |  |  |  |
Disclosure of net operating revenue [line items] |  |  |  |
Gross operating revenues |  |  | 357,076 | 663,024
Electricity sales to distributors [member] | Restated [Member] | Interest [member] |  |  |  |
Disclosure of net operating revenue [line items] |  |  |  |
Gross operating revenues |  |  | 91,404 | 85,986
Use of the main distribution and transmission grid [member] |  |  |  |
Disclosure of net operating revenue [line items] |  |  |  |
Gross operating revenues |  | 8,780,612 |  |
PIS/Pasep and Cofins |  | (667,419) |  |
ICMS (VAT) |  | (2,118,380) |  |
Service tax (ISSQN) |  |  |  |
Regulatory charges |  | (1,622,217) |  |
Net operating revenues |  | 4,372,596 |  |
Use of the main distribution and transmission grid [member] | Residential [member] |  |  |  |
Disclosure of net operating revenue [line items] |  |  |  |
Gross operating revenues |  | 2,788,725 |  |
Use of the main distribution and transmission grid [member] | Industrial [member] |  |  |  |
Disclosure of net operating revenue [line items] |  |  |  |
Gross operating revenues |  | 1,273,320 |  |
Use of the main distribution and transmission grid [member] | Trade, services and other activities [member] |  |  |  |
Disclosure of net operating revenue [line items] |  |  |  |
Gross operating revenues |  | 1,628,098 |  |
Use of the main distribution and transmission grid [member] | Rural [member] |  |  |  |
Disclosure of net operating revenue [line items] |  |  |  |
Gross operating revenues |  | 548,682 |  |
Use of the main distribution and transmission grid [member] | Public entities [member] |  |  |  |
Disclosure of net operating revenue [line items] |  |  |  |
Gross operating revenues |  | 180,814 |  |
Use of the main distribution and transmission grid [member] | Public lighting [member] |  |  |  |
Disclosure of net operating revenue [line items] |  |  |  |
Gross operating revenues |  | 205,904 |  |
Use of the main distribution and transmission grid [member] | Public service [member] |  |  |  |
Disclosure of net operating revenue [line items] |  |  |  |
Gross operating revenues |  | 195,597 |  |
Use of the main distribution and transmission grid [member] | Free consumers [member] |  |  |  |
Disclosure of net operating revenue [line items] |  |  |  |
Gross operating revenues |  | 1,164,020 |  |
Use of the main distribution and transmission grid [member] | Concessionaires and generators [member] |  |  |  |
Disclosure of net operating revenue [line items] |  |  |  |
Gross operating revenues |  | 61,720 |  |
Use of the main distribution and transmission grid [member] | Operating and maintenance income - O&M and interest income [member] |  |  |  |
Disclosure of net operating revenue [line items] |  |  |  |
Gross operating revenues |  | 733,732 |  |
Use of the main distribution and transmission grid [member] | Restated [Member] |  |  |  |
Disclosure of net operating revenue [line items] |  |  |  |
Gross operating revenues |  |  | 8,270,996 | 6,867,274
Net operating revenues |  |  | 4,138,771 | 3,469,060
Use of the main distribution and transmission grid [member] | Restated [Member] | Residential [member] |  |  |  |
Disclosure of net operating revenue [line items] |  |  |  |
Gross operating revenues |  |  | 2,585,892 | 2,222,621
Use of the main distribution and transmission grid [member] | Restated [Member] | Industrial [member] |  |  |  |
Disclosure of net operating revenue [line items] |  |  |  |
Gross operating revenues |  |  | 1,280,168 | 1,110,089
Use of the main distribution and transmission grid [member] | Restated [Member] | Trade, services and other activities [member] |  |  |  |
Disclosure of net operating revenue [line items] |  |  |  |
Gross operating revenues |  |  | 1,713,632 | 1,407,156
Use of the main distribution and transmission grid [member] | Restated [Member] | Rural [member] |  |  |  |
Disclosure of net operating revenue [line items] |  |  |  |
Gross operating revenues |  |  | 467,044 | 362,778
Use of the main distribution and transmission grid [member] | Restated [Member] | Public entities [member] |  |  |  |
Disclosure of net operating revenue [line items] |  |  |  |
Gross operating revenues |  |  | 217,027 | 185,383
Use of the main distribution and transmission grid [member] | Restated [Member] | Public lighting [member] |  |  |  |
Disclosure of net operating revenue [line items] |  |  |  |
Gross operating revenues |  |  | 206,492 | 184,530
Use of the main distribution and transmission grid [member] | Restated [Member] | Public service [member] |  |  |  |
Disclosure of net operating revenue [line items] |  |  |  |
Gross operating revenues |  |  | 174,414 | 141,556
Use of the main distribution and transmission grid [member] | Restated [Member] | Free consumers [member] |  |  |  |
Disclosure of net operating revenue [line items] |  |  |  |
Gross operating revenues |  |  | 1,052,535 | 795,105
Use of the main distribution and transmission grid [member] | Restated [Member] | Concessionaires and generators [member] |  |  |  |
Disclosure of net operating revenue [line items] |  |  |  |
Gross operating revenues |  |  | 62,414 | 80,329
Use of the main distribution and transmission grid [member] | Restated [Member] | Operating and maintenance income - O&M and interest income [member] |  |  |  |
Disclosure of net operating revenue [line items] |  |  |  |
Gross operating revenues |  |  | 511,378 | 377,727
Construction income [member] |  |  |  |
Disclosure of net operating revenue [line items] |  |  |  |
Gross operating revenues |  | 1,414,067 |  |
PIS/Pasep and Cofins |  |  |  |
ICMS (VAT) |  |  |  |
Service tax (ISSQN) |  |  |  |
Regulatory charges |  |  |  |
Net operating revenues |  | 1,414,067 |  |
Construction income [member] | Power distribution service concession [member] |  |  |  |
Disclosure of net operating revenue [line items] |  |  |  |
Gross operating revenues |  | 1,154,488 |  |
Construction income [member] | Power gas distribution service concession [member] |  |  |  |
Disclosure of net operating revenue [line items] |  |  |  |
Gross operating revenues |  | 7,438 |  |
Construction income [member] | Power Transmission Concession [member] |  |  |  |
Disclosure of net operating revenue [line items] |  |  |  |
Gross operating revenues | [1] | 252,141 |  |
Construction income [member] | Restated [Member] |  |  |  |
Disclosure of net operating revenue [line items] |  |  |  |
Gross operating revenues |  |  | 1,132,884 | 1,097,313
Net operating revenues |  |  | 1,132,884 | 1,097,313
Construction income [member] | Restated [Member] | Power distribution service concession [member] |  |  |  |
Disclosure of net operating revenue [line items] |  |  |  |
Gross operating revenues |  |  | 904,023 | 741,855
Construction income [member] | Restated [Member] | Power gas distribution service concession [member] |  |  |  |
Disclosure of net operating revenue [line items] |  |  |  |
Gross operating revenues |  |  | 12,153 | 13,478
Construction income [member] | Restated [Member] | Power Transmission Concession [member] |  |  |  |
Disclosure of net operating revenue [line items] |  |  |  |
Gross operating revenues | [1] |  | 216,708 | 341,980
Fair value of assets from the indemnity for the concession [member] |  |  |  |
Disclosure of net operating revenue [line items] |  |  |  |
Gross operating revenues |  | 57,341 |  |
PIS/Pasep and Cofins |  |  |  |
ICMS (VAT) |  |  |  |
Service tax (ISSQN) |  |  |  |
Regulatory charges |  |  |  |
Net operating revenues |  | 57,341 |  |
Fair value of assets from the indemnity for the concession [member] | Restated [Member] |  |  |  |
Disclosure of net operating revenue [line items] |  |  |  |
Gross operating revenues |  |  | 36,646 | 47,499
Net operating revenues |  |  | 36,646 | 47,499
Distribution of piped gas [member] |  |  |  |
Disclosure of net operating revenue [line items] |  |  |  |
Gross operating revenues |  | 679,304 |  |
PIS/Pasep and Cofins |  | (60,774) |  |
ICMS (VAT) |  | (115,640) |  |
Service tax (ISSQN) |  | (235) |  |
Regulatory charges |  |  |  |
Net operating revenues |  | 502,655 |  |
Distribution of piped gas [member] | Restated [Member] |  |  |  |
Disclosure of net operating revenue [line items] |  |  |  |
Gross operating revenues |  |  | 1,003,790 | 753,222
Net operating revenues |  |  | 843,183 | 557,186
Sectorial financial assets and liabilities result [member] |  |  |  |
Disclosure of net operating revenue [line items] |  |  |  |
Gross operating revenues |  | 746,052 |  |
PIS/Pasep and Cofins |  | (69,113) |  |
ICMS (VAT) |  |  |  |
Service tax (ISSQN) |  |  |  |
Regulatory charges |  |  |  |
Net operating revenues |  | 676,939 |  |
Sectorial financial assets and liabilities result [member] | Restated [Member] |  |  |  |
Disclosure of net operating revenue [line items] |  |  |  |
Gross operating revenues |  |  | 25,057 | 985,344
Net operating revenues |  |  | 18,631 | 893,688
Other operating revenue [member] |  |  |  |
Disclosure of net operating revenue [line items] |  |  |  |
Gross operating revenues |  | 406,539 |  |
PIS/Pasep and Cofins |  | (35,771) |  |
ICMS (VAT) |  | (65) |  |
Service tax (ISSQN) |  | (4,269) |  |
Regulatory charges |  |  |  |
Net operating revenues |  | 366,434 |  |
Other operating revenue [member] | Leasing and rent [member] |  |  |  |
Disclosure of net operating revenue [line items] |  |  |  |
Gross operating revenues |  | 176,452 |  |
Other operating revenue [member] | Fair value in the purchase and sale of power in the active market [member] |  |  |  |
Disclosure of net operating revenue [line items] |  |  |  |
Gross operating revenues |  | 137,463 |  |
Other operating revenue [member] | Income from rendering of services [member] |  |  |  |
Disclosure of net operating revenue [line items] |  |  |  |
Gross operating revenues |  | 44,182 |  |
Other operating revenue [member] | Other income [member] |  |  |  |
Disclosure of net operating revenue [line items] |  |  |  |
Gross operating revenues |  | R$ 48,442 |  |
Other operating revenue [member] | Restated [Member] |  |  |  |
Disclosure of net operating revenue [line items] |  |  |  |
Gross operating revenues |  |  | 438,876 | 199,788
Net operating revenues |  |  | 407,248 | 171,218
Other operating revenue [member] | Restated [Member] | Leasing and rent [member] |  |  |  |
Disclosure of net operating revenue [line items] |  |  |  |
Gross operating revenues |  |  | 141,315 | 130,007
Other operating revenue [member] | Restated [Member] | Fair value in the purchase and sale of power in the active market [member] |  |  |  |
Disclosure of net operating revenue [line items] |  |  |  |
Gross operating revenues |  |  | 204,876 |
Other operating revenue [member] | Restated [Member] | Income from rendering of services [member] |  |  |  |
Disclosure of net operating revenue [line items] |  |  |  |
Gross operating revenues |  |  | 51,780 | 39,705
Other operating revenue [member] | Restated [Member] | Other income [member] |  |  |  |
Disclosure of net operating revenue [line items] |  |  |  |
Gross operating revenues |  |  | R$ 40,905 | R$ 30,076
[1] | The balance contains the amount of construction revenue, the construction margin and the efficiency gain or loss as detailed in Note 11.3

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