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REVENUE (Details) - BRL (R$)
R$ in Millions
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Revenue [abstract]      
Revenue from supply of energy (a) R$ 30,158 R$ 29,619 R$ 26,432
Revenue from use of the electricity distribution systems (TUSD) 3,685 3,448 3,022
CVA and Other financial components (b) (1,147) 2,146 455
Reimbursement of PIS/Pasep and Cofins over ICMS credits to customers- realization [1] 2,360 1,317 266
Transmission revenue      
   Transmission operation and maintenance revenue (c) 413 355 280
   Transmission construction revenue (c) 407 252 201
   Interest revenue arising from the financing component in the transmission contract asset (c) (Note 15) 575 660 438
Generation indemnity revenue (Note 14.1) 47
Distribution construction revenue 3,246 1,852 1,436
Adjustment to expectation of cash flow from indemnifiable financial assets of distribution concession 39 54 16
Revenue on financial updating of the Concession Grant Fee (e) 467 523 347
Transactions in energy on the CCEE (f) 183 1,157 154
Mechanism for the sale of surplus (g) 453 453 234
Supply of gas 4,529 3,470 2,011
Fine for violation of service continuity indicator 94 70 51
Advances for services provided [2] 154
PIS/Pasep and Cofins credits to be refunded to consumers (830)
Other operating revenues (h) 2,658 1,935 1,709
Deductions on revenue (i) (12,686) (13,679) (11,722)
Net revenue R$ 34,463 R$ 33,646 R$ 25,228
[1] For more information, see Note 9a.
[2] Refers to the negotiation with free consumers that resulted in the anticipation of revenue related to the provision of commercialization services by the subsidiary ESCEE.