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CONSOLIDATED STATEMENT OF INCOME - BRL (R$)
R$ in Millions
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Profit or loss [abstract]      
NET REVENUE R$ 34,463 R$ 33,646 R$ 25,228
OPERATING COSTS      
Cost of energy and gas (20,020) (21,449) (14,942)
Infrastructure and construction cost (3,536) (2,036) (1,581)
Operating costs (4,095) (3,438) (3,322)
TOTAL COST (27,651) (26,923) (19,845)
GROSS INCOME 6,812 6,723 5,383
OPERATING EXPENSES      
Expected credit losses (109) (144) (147)
General and administrative expenses (789) (572) (583)
Other operating expenses (1,125) (598) (857)
Total Operating expenses  (2,023) (1,314) (1,587)
Periodic Tariff Revision, net 215 502
Renegotiation of hydrological risk (Law 14,052/20), net 1,032
Gains arising from the sale of non-current asset held for sale, net 52 109
Bargain purchase 5 4 51
Share of income, net, of affiliates, subsidiaries and joint ventures 845 182 357
Operating income before financial income (expenses) and taxes 5,686 6,951 4,706
Finance income 1,500 844 2,445
Finance expenses (3,066) (3,096) (3,350)
Total financial income and expenses (1,566) (2,252) (905)
Income before income tax and social contribution tax 4,120 4,699 3,801
Current income tax and social contribution tax (950) (1,156) (684)
Deferred income tax and social contribution tax 924 210 (252)
NET INCOME FOR THE YEAR 4,094 3,753 2,865
Total of net income for the year attributed to:      
Equity holders of the parent 4,092 3,751 2,864
Non-controlling interests 2 2 1
Total net income for the year  R$ 4,094 R$ 3,753 R$ 2,865
Basic and diluted earnings per preferred share - R$ R$ 1.86 R$ 1.70 R$ 1.30
Basic and diluted earnings per common share - R$ R$ 1.86 R$ 1.70 R$ 1.30