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Operating Segments - Schedule of Operating Revenues, Costs and Expenses (Details) - BRL (R$) R$ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
IfrsStatementLineItems [Line Items] |  |  |
REVENUE | R$ 36,850 | R$ 34,463 | R$ 33,646
COSTS AND EXPENSES |  |  |
Post-employment obligations | (535) | (482) | (422)
Materials, outsourced services and others expenses (revenues) | 140 | 148 | 94
Construction costs | (4,072) | (3,536) | (2,036)
COSTS AND EXPENSES | (6,167) | (6,069) | (4,752)
Finance net income (expenses) | 1,272 | 1,500 | 844
INCOME BEFORE INCOME TAX AND SOCIAL CONTRIBUTION TAX | 6,851 | 4,120 | 4,699
Income tax and social contribution tax | 1,084 | 26 | 946
NET INCOME FOR THE YEAR | 5,767 | 4,094 | 3,753
Non-controlling interests | 3 | 2 | 2
Operating Segments [Member] | Generation Segment [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
REVENUE | 2,875 | 2,661 | 2,921
COST OF ENERGY, GAS AND CHARGES FOR USE OF THE NATIONAL GRID | (347) | (331) | (795)
COSTS AND EXPENSES |  |  |
Personnel | (148) | (162) | (149)
Employees and managers' income sharing | (16) | (15) | (14)
Post-employment obligations | (59) | (66) | (5)
Materials, outsourced services and others expenses (revenues) | (223) | (395) | (209)
Depreciation and amortization | (327) | (328) | (254)
Operating provisions and impairment | (29) | (18) | (20)
Total cost of operation | (802) | (984) | (651)
COSTS AND EXPENSES | (1,149) | (1,315) | (1,446)
Renegotiation of hydrological risk (Law 14,052/20), net |  |  | 1,032
Equity in earnings of unconsolidated investees, net | (2) | (2) |
Equity in earnings of unconsolidated investees, net |  |  | 54
INCOME BEFORE FINANCE INCOME (EXPENSES) | 1,724 | 1,344 | 2,561
Finance net income (expenses) | (11) | (150) | (758)
INCOME BEFORE INCOME TAX AND SOCIAL CONTRIBUTION TAX | 1,713 | 1,194 | 1,803
Income tax and social contribution tax | (326) | (307) | (409)
NET INCOME FOR THE YEAR | 1,387 | 887 | 1,394
Equity holders of the parent | 1,387 | 887 | 1,394
Operating Segments [Member] | Transmission Segment [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
REVENUE | 1,091 | 1,195 | 1,094
COST OF ENERGY, GAS AND CHARGES FOR USE OF THE NATIONAL GRID |  |  |
COSTS AND EXPENSES |  |  |
Personnel | (137) | (135) | (115)
Employees and managers' income sharing | (16) | (11) | (14)
Post-employment obligations | (36) | (42) | 3
Materials, outsourced services and others expenses (revenues) | (88) | (96) | (94)
Depreciation and amortization | (1) |  | (3)
Operating provisions and impairment | (14) | (3) | (12)
Construction costs | (172) | (291) | (184)
Total cost of operation | (464) | (578) | (419)
COSTS AND EXPENSES | (464) | (578) | (419)
Periodic Tariff Revision, net |  |  | 215
Equity in earnings of unconsolidated investees, net |  | 3 |
Result of business combination |  |  | 4
INCOME BEFORE FINANCE INCOME (EXPENSES) | 627 | 620 | 894
Finance net income (expenses) | (48) | (96) | (395)
INCOME BEFORE INCOME TAX AND SOCIAL CONTRIBUTION TAX | 579 | 524 | 499
Income tax and social contribution tax | (114) | (174) | (78)
NET INCOME FOR THE YEAR | 465 | 350 | 421
Equity holders of the parent | 465 | 350 | 421
Operating Segments [Member] | Tranding Segment [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
REVENUE | 7,686 | 7,918 | 6,430
COST OF ENERGY, GAS AND CHARGES FOR USE OF THE NATIONAL GRID | (6,318) | (6,880) | (5,735)
COSTS AND EXPENSES |  |  |
Personnel | (27) | (12) | (20)
Employees and managers' income sharing | (3) | (6) | (3)
Post-employment obligations | (8) | (10) | (1)
Materials, outsourced services and others expenses (revenues) | (18) | (14) | (14)
Depreciation and amortization |  |  | (1)
Operating provisions and impairment | (7) | (34) | (14)
Construction costs |  |  |
Total cost of operation | (63) | (76) | (53)
COSTS AND EXPENSES | (6,381) | (6,956) | (5,788)
INCOME BEFORE FINANCE INCOME (EXPENSES) | 1,305 | 962 | 642
Finance net income (expenses) | 82 | 34 | 15
INCOME BEFORE INCOME TAX AND SOCIAL CONTRIBUTION TAX | 1,387 | 996 | 657
Income tax and social contribution tax | (428) | (314) | (224)
NET INCOME FOR THE YEAR | 959 | 682 | 433
Equity holders of the parent | 959 | 682 | 433
Operating Segments [Member] | Distribution Segment [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
REVENUE | 23,348 | 20,919 | 22,345
COST OF ENERGY, GAS AND CHARGES FOR USE OF THE NATIONAL GRID | (12,656) | (11,938) | (14,853)
COSTS AND EXPENSES |  |  |
Personnel | (875) | (913) | (847)
Employees and managers' income sharing | (102) | (40) | (94)
Post-employment obligations | (400) | (421) | 19
Materials, outsourced services and others expenses (revenues) | (2,157) | (1,786) | (1,524)
Depreciation and amortization | (834) | (738) | (683)
Operating provisions and impairment | (455) | (398) | (198)
Construction costs | (3,600) | (3,193) | (1,802)
Total cost of operation | (8,423) | (7,489) | (5,129)
COSTS AND EXPENSES | (21,079) | (19,427) | (19,982)
INCOME BEFORE FINANCE INCOME (EXPENSES) | 2,269 | 1,492 | 2,363
Finance net income (expenses) | (253) | (1,115) | (7)
INCOME BEFORE INCOME TAX AND SOCIAL CONTRIBUTION TAX | 2,016 | 377 | 2,356
Income tax and social contribution tax | (405) | 67 | (655)
NET INCOME FOR THE YEAR | 1,611 | 444 | 1,701
Equity holders of the parent | 1,611 | 444 | 1,701
Operating Segments [Member] | Gas [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
REVENUE | 3,618 | 3,690 | 2,852
COST OF ENERGY, GAS AND CHARGES FOR USE OF THE NATIONAL GRID | (2,237) | (2,735) | (2,011)
COSTS AND EXPENSES |  |  |
Personnel | (73) | (66) | (56)
Employees and managers' income sharing |  |  |
Post-employment obligations |  |  |
Materials, outsourced services and others expenses (revenues) | (63) | (57) | (48)
Depreciation and amortization | (94) | (91) | (90)
Operating provisions and impairment | 2 |  | (6)
Construction costs | (300) | (52) | (50)
Total cost of operation | (528) | (266) | (250)
COSTS AND EXPENSES | (2,765) | (3,001) | (2,261)
INCOME BEFORE FINANCE INCOME (EXPENSES) | 853 | 689 | 591
Finance net income (expenses) | (9) | (9) | (89)
INCOME BEFORE INCOME TAX AND SOCIAL CONTRIBUTION TAX | 844 | 680 | 502
Income tax and social contribution tax | (248) | (199) | (142)
NET INCOME FOR THE YEAR | 596 | 481 | 360
Equity holders of the parent | 593 | 479 | 358
Non-controlling interests | 3 | 2 | 2
Operating Segments [Member] | Investees Segments [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
REVENUE | 18 | 7 | 6
COST OF ENERGY, GAS AND CHARGES FOR USE OF THE NATIONAL GRID | (4) | (1) |
COSTS AND EXPENSES |  |  |
Personnel | (48) | (64) | (53)
Employees and managers' income sharing | (20) | (11) | (9)
Post-employment obligations | (88) | (87) | (32)
Materials, outsourced services and others expenses (revenues) | 275 | (84) | (117)
Depreciation and amortization | (18) | (25) | (18)
Operating provisions and impairment | (106) | (3) | (114)
Construction costs |  |  |
Total cost of operation | (5) | (274) | (343)
COSTS AND EXPENSES | (9) | (275) | (343)
Equity in earnings of unconsolidated investees, net | 434 | 842 |
Equity in earnings of unconsolidated investees, net |  |  | 128
Gains arising from the sale of non-current asset held for sale | 9 |  | 109
Result of business combination |  | 5 |
INCOME BEFORE FINANCE INCOME (EXPENSES) | 452 | 579 | (100)
Finance net income (expenses) | (140) | (230) | (1,018)
INCOME BEFORE INCOME TAX AND SOCIAL CONTRIBUTION TAX | 312 | 349 | (1,118)
Income tax and social contribution tax | 437 | 901 | 562
NET INCOME FOR THE YEAR | 749 | 1,250 | (556)
Equity holders of the parent | 749 | 1,250 | (556)
Operating Segments [Member] | Total Segments [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
REVENUE | 38,636 | 36,390 | 35,648
COST OF ENERGY, GAS AND CHARGES FOR USE OF THE NATIONAL GRID | (21,562) | (21,885) | (23,394)
COSTS AND EXPENSES |  |  |
Personnel | (1,308) | (1,352) | (1,240)
Employees and managers' income sharing | (157) | (83) | (134)
Post-employment obligations | (591) | (626) | (16)
Materials, outsourced services and others expenses (revenues) | (2,274) | (2,432) | (2,006)
Depreciation and amortization | (1,274) | (1,182) | (1,049)
Operating provisions and impairment | (609) | (456) | (364)
Construction costs | (4,072) | (3,536) | (2,036)
Total cost of operation | (10,285) | (9,667) | (6,845)
COSTS AND EXPENSES | (31,847) | (31,552) | (30,239)
Periodic Tariff Revision, net |  |  | 215
Renegotiation of hydrological risk (Law 14,052/20), net |  |  | 1,032
Equity in earnings of unconsolidated investees, net | 432 | 843 |
Equity in earnings of unconsolidated investees, net |  |  | 182
Gains arising from the sale of non-current asset held for sale | 9 |  | 109
Result of business combination |  | 5 | 4
INCOME BEFORE FINANCE INCOME (EXPENSES) | 7,230 | 5,686 | 6,951
Finance net income (expenses) | (379) | (1,566) | (2,252)
INCOME BEFORE INCOME TAX AND SOCIAL CONTRIBUTION TAX | 6,851 | 4,120 | 4,699
Income tax and social contribution tax | (1,084) | (26) | (946)
NET INCOME FOR THE YEAR | 5,767 | 4,094 | 3,753
Equity holders of the parent | 5,764 | 4,092 | 3,751
Non-controlling interests | 3 | 2 | 2
Operating Segments [Member] | Intersegment Transactions Segments [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
REVENUE | (1,208) | (1,423) | (1,575)
COST OF ENERGY, GAS AND CHARGES FOR USE OF THE NATIONAL GRID | 1,208 | 1,423 | 1,575
COSTS AND EXPENSES |  |  |
Personnel |  |  |
Employees and managers' income sharing |  |  |
Post-employment obligations |  |  |
Materials, outsourced services and others expenses (revenues) |  |  |
Depreciation and amortization |  |  |
Operating provisions and impairment |  |  |
Construction costs |  |  |
Total cost of operation |  |  |
COSTS AND EXPENSES | 1,208 | 1,423 | 1,575
Operating Segments [Member] | Reconciliation Segments [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
REVENUE | (578) | (504) | (427)
COST OF ENERGY, GAS AND CHARGES FOR USE OF THE NATIONAL GRID | 532 | 442 | 370
COSTS AND EXPENSES |  |  |
Personnel |  |  |
Employees and managers' income sharing |  |  |
Post-employment obligations |  |  |
Materials, outsourced services and others expenses (revenues) | 46 | 62 | 57
Depreciation and amortization |  |  |
Operating provisions and impairment |  |  |
Construction costs |  |  |
Total cost of operation | 46 | 62 | 57
COSTS AND EXPENSES | 578 | 504 | 427
Operating Segments [Member] | All Other Segments [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
REVENUE | 36,850 | 34,463 | 33,646
COST OF ENERGY, GAS AND CHARGES FOR USE OF THE NATIONAL GRID | (19,822) | (20,020) | (21,449)
COSTS AND EXPENSES |  |  |
Personnel | (1,308) | (1,352) | (1,240)
Employees and managers' income sharing | (157) | (83) | (134)
Post-employment obligations | (591) | (626) | (16)
Materials, outsourced services and others expenses (revenues) | (2,228) | (2,370) | (1,949)
Depreciation and amortization | (1,274) | (1,182) | (1,049)
Operating provisions and impairment | (609) | (456) | (364)
Construction costs | (4,072) | (3,536) | (2,036)
Total cost of operation | (10,239) | (9,605) | (6,788)
COSTS AND EXPENSES | (30,061) | (29,625) | (28,237)
Periodic Tariff Revision, net |  |  | 215
Renegotiation of hydrological risk (Law 14,052/20), net |  |  | 1,032
Equity in earnings of unconsolidated investees, net | 432 | 843 |
Equity in earnings of unconsolidated investees, net |  |  | 182
Gains arising from the sale of non-current asset held for sale | 9 |  | 109
Result of business combination |  | 5 | 4
INCOME BEFORE FINANCE INCOME (EXPENSES) | 7,230 | 5,686 | 6,951
Finance net income (expenses) | (379) | (1,566) | (2,252)
INCOME BEFORE INCOME TAX AND SOCIAL CONTRIBUTION TAX | 6,851 | 4,120 | 4,699
Income tax and social contribution tax | (1,084) | (26) | (946)
NET INCOME FOR THE YEAR | 5,767 | 4,094 | 3,753
Equity holders of the parent | 5,764 | 4,092 | 3,751
Non-controlling interests | R$ 3 | R$ 2 | R$ 2

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