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CONSOLIDATED STATEMENT OF CASH FLOWS - BRL (R$)
R$ in Millions
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
CASH FLOW FROM OPERATIONS      
Net income for the year R$ 7,119 R$ 5,767 R$ 4,094
Adjustments to reconcile net income to net cash flows:      
Income tax expenses 2,239 1,084 26
Depreciation and amortization 1,376 1,274 1,182
Loss on write-off of net residual value of unrecoverable concession financial assets, concessional contract asset, PP&E and Intangible assets 83 97 74
Fair value adjustment of financial assets 172
Write off related to contractual securities 11 (8) 1
Bargain purchase (5)
Impairment loss of equity investments 46
Discount and premium on repurchase of debt securities 47
Share of profit of equity-accounted investees and joint ventures, net of tax (224) (432) (843)
Remeasuring of concession financial and concession contract assets (1,206) (1,246) (1,245)
Periodic Tariff Review adjustments (1,676)
Interest and monetary variation 428 676 493
Exchange variation on loans 464 (277) (338)
Reimbursement of PIS/Pasep and Cofins over ICMS credits to customers – Realization (513) (1,909) (2,360)
Reversal of amounts to be refunded to consumers (411)
Gains arising from the sale of PP&E (43)
Gain on sale of non-current assets held for sale (1,617) (319) (52)
Transaction costs 20 14 7
Expected credit losses 175 175 109
Provisions for contingencies (90) 360 342
Other provisions 59 (18)
Net gain on derivative instruments at fair value through profit or loss (147) 177 438
CVA (Parcel A items Compensation) Account and Other financial components in tariff adjustments (423) 213 1,147
Post-employment obligations 488 611 666
Other (95) (46) 130
Total 6,004 6,270 4,067
(Increase) decrease in assets      
Receivables from customers, traders and concession holders (553) (839) (440)
CVA and Other financial components in tariff adjustments 191
Recoverable taxes 275 175 2,490
Income tax and social contribution tax credits 110 6 149
Escrow deposits 116 45 31
Dividends received from investees 350 592 708
Contractual assets and concession financial assets 852 905 620
Other (194) 154 87
Total (increase) / decrease in assets  956 1,038 3,836
Increase (decrease) in liabilities      
Suppliers (65) 185 149
Taxes payable 180 778 408
Income tax and social contribution tax payable 50
Payroll and related charges (21) (21) 35
Regulatory charges (62) 2 (240)
Post-employment obligations (439) (535) (482)
Pis/Pasep and Cofins over ICMS credits to customers 509 249 219
Other (255) (40) (200)
Total increase (decrease) in liabilities  (153) 618 (61)
Cash generated by operating activities 6,807 7,926 7,842
Interest received 351 328 291
Interest paid on loans, financing and debentures (956) (1,026) (1,010)
Interest paid on lease contracts (6) (5) (4)
Income tax and social contribution tax paid (1,136) (601) (704)
Cash inflows from settlement of derivatives instruments 436 24 129
NET CASH FLOWS FROM OPERATING ACTIVITIES 5,496 6,646 6,544
INVESTING ACTIVITIES      
Investments in marketable securities (16,631) (11,238) (14,152)
Redemptions in marketable securities 16,924 12,360 14,420
Restricted cash (205)
Acquisition of equity investees (1) (37) (52)
Arising from the sale of equity interest, net of costs of sales 2,737 669 52
Sale of PP&E 101
Reduction of share capital in investee 57
Settlement of put option (780)
Acquisition of property, plant and equipment (671) (1,076) (173)
Acquisition of intangible assets (248) (188) (119)
Contract assets – distribution of gas and energy infrastructure (4,439) (3,679) (3,112)
NET CASH USED IN INVESTING ACTIVITIES (2,376) (3,969) (3,136)
FINANCING ACTIVITIES      
Proceeds from loans and debentures 4,582 1,988 1,981
Interest on capital and dividends paid (4,294) (1,823) (2,094)
Payment of loans and debentures (2,975) (2,679) (2,613)
Leasing liabilities paid (72) (67) (66)
NET CASH FLOWS USED IN FINANCING ACTIVITIES (2,759) (2,581) (2,792)
NET INCREASE IN CASH AND CASH EQUIVALENTS FOR THE YEAR 361 96 616
Cash and cash equivalents at the beginning of the year 1,537 1,441 825
Cash and cash equivalents at the end of the year R$ 1,898 R$ 1,537 R$ 1,441