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CASH FLOW STATEMENTS - BRL (R$)
R$ in Thousands
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
OPERATIONAL ACTIVITIES      
Income before income tax and social contribution R$ 1,396,363 R$ 4,333,995 R$ 10,974,275
Adjustments to reconcile profit with cash generated by operations:      
Depreciation and amortization 3,621,342 2,690,269 1,443,285
Net exchange and monetary changes 3,342,161 650,770 419,569
Financial charges 6,095,390 4,980,707 2,035,779
Result of equity method investees (2,062,090) (2,369,777) (1,507,418)
Other income and expenses (651,280) (186,924) (1,210,754)
Transmission revenues (17,432,037) (15,774,884) (17,450,333)
Construction cost - transmission 3,291,132 1,671,307 1,312,861
Regulatory remeasurements - Transmission contracts 12,144 (365,178) (4,858,744)
Operating provisions (reversals) 2,481,054 6,928,425 14,922,063
GSF Reimbursement     (4,265,889)
Fixed and intangible asset write off 632,441 440,775 208,618
Income from hedging and derivatives 1,521,637 356,494 (725,826)
Others 637,869 1,310,565 1,666,545
Adjustments to reconcile profit with cash generated by operations 1,489,763 332,549 (8,010,244)
(Accruals) / decreases in operating assets      
Accounts Receivable, net (927,096) (408,364) 1,671,234
Marketable securities, net   (1,499,907) (2,561,522)
Reimbursement right 473,496 1,036,409 582,672
Others 109,683 (436,278) 1,534,289
(Accruals) / decreases in operating assets (343,917) (1,308,140) 1,226,673
Increases / (decreases) in operating liabilities      
Suppliers (526,425) 233,911 39,894
Advances (162,275) 104,964  
Payroll (813,498) 222,345 213,739
Regulatory fees (280,680) 159,695 (82,459)
Others 217,985 (382,451) (41,755)
Increases / (decreases) in operating liabilities (1,564,893) 338,464 129,419
Payment of interests (5,512,449) (3,211,343) (2,176,135)
Receipt of allowed annual revenue - RAP 18,287,910 14,623,582 14,832,701
Receipt of dividends and interest on equity 1,329,703 1,494,560 2,175,585
Payment of judicial contingencies (2,672,962) (4,222,504) (6,228,610)
Securities and restricted deposits (733,354) (1,199,426) (2,511,386)
Payment of income tax and social contribution (2,930,778) (2,607,461) (2,463,047)
Supplementary social security (510,048) (469,943) (383,424)
Net cash from operating activities of continuing operations 8,235,338 8,104,333 7,565,808
Net cash (used in) operating activities of discontinued operations   (2,908,844) (600,801)
Net cash of operating activities 8,235,338 5,195,489 6,965,007
FINANCING ACTIVITIES      
Receipt for issuing shares   30,648,282  
Loans and financing obtained and debentures obtained 11,821,045 8,500,000 4,828,697
Payment of loans and financing and debentures - principal (13,763,329) (6,734,696) (8,175,960)
Payment of dividends and interest on equity (864,192) (1,490,058) (3,747,606)
Payment to dissident shareholders - incorporation of shares (226,057)    
Repurchase of shares (1,967,218)    
Payment of obligations with CDE and revitalization of basins - principal (1,433,816)    
Payment of leases - principal (765,525) (721,074) (571,829)
Others 443,961 44,746 (499,734)
Net cash from (used in) financing activities of continuing operations (6,755,131) 30,247,200 (8,166,432)
Net cash from (used in) financing activities of discontinued operations   (174,814) 2,105,924
Net cash from (used in) financing activities (6,755,131) 30,072,386 (6,060,508)
INVESTMENT ACTIVITIES      
Acquisition of debentures (450,000)    
Advance granting for future capital increase     (2,447,464)
Receipt of loans and financing 982,425 2,358,352 4,897,907
Marketable Securities, net 3,143,232    
Interest Received - Marketable Securities 4,066,478 3,763,966 589,071
Receipt of financial charges 172,457 316,278 672,085
Acquisition of property, plant and equipment (3,862,770) (1,585,639) (1,085,090)
Acquisition of intangible assets (258,371) (32,038,772) (103,494)
Transmission infrastructure - contractual assets (3,269,358) (1,652,992) (1,299,710)
Acquisition / capital injection in shareholdings (1,439,478) (74,307) (274,354)
Disposal of investments in shareholdings 907,004 1,169,784  
Others (116,617) (57,832) (443,738)
Net cash (used in) investment activities of continuing operations (124,998) (27,801,162) 505,213
Net cash from (used in) investment activities of discontinued operations 952,036 3,079,754 (1,503,660)
Net cash provided by (used in) investment activities 827,038 (24,721,408) (998,447)
Increase in cash and cash equivalents 2,307,245 10,546,467 (93,948)
Cash and cash equivalents at the beginning of the fiscal year 10,739,126 192,659 286,607
Cash and cash equivalents at the end of the year 13,046,371 10,739,126 192,659
Increase (decrease) in cash and cash equivalents from discontinued operations R$ 952,036 R$ (3,904) R$ 1,463