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CONSOLIDATED STATEMENT OF CASH FLOWS - BRL (R$)
R$ in Millions
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
CASH FLOW FROM OPERATIONS      
Net income for the year from continuing operations R$ 3,753 R$ 2,865 R$ 2,971
Net income for the year from discontinuing operations 224
Adjustments to reconcile net income to net cash flows:      
Deferred income tax and social contribution tax (210) 252 145
Depreciation and amortization 1,049 989 958
Loss on write-off of net residual value of unrecoverable concession financial assets, concessional contract asset, PP&E and Intangible assets 47 39 125
Impairment of contract asset and intangible assets (12) 24
Result of business combination (4) (51)
Dividends declared by investee classified as held for sale (73)
Renegotiation of hydrological risk (Law 14,052/20), net (1,032)  
Impairment for contract assets 11  
Premium on repurchase of debt securities 491  
Share of loss (gain), net, of subsidiaries and joint ventures (182) (357) (125)
Remeasuring of concession financial and concession contract assets (1,306) (801) (756)
Periodic Tariff Review adjustments (237) (552)
Interest and monetary variation 1,381 1,202 1,190
Recognition of PIS/Pasep and Cofins taxes credits over ICMS (2,952)
Exchange variation on loans, financing and debentures 353 1,742 226
Reimbursement of  PIS/Pasep and Cofins over ICMS credits to customers — realization (1,317) (266)
Gain on sale of non-current asset held for sale (109)
Transaction costs 20 15 38
Provisions for operating losses 375 423 2,401
Net gain on derivative instruments at fair value through profit or loss 538 (1,753) (998)
CVA (Parcel A items Compensation) Account and Other financial components in tariff adjustments (2,146) (455) (58)
Post-employment obligations 86 491 464
Others (24) 56 (8)
 Total 1,537 3,827 3,796
Receivables from customers and traders and Concession holders — Transport of electricity (90) (78) (666)
CVA and Other financial components in tariff adjustments 15 1,467 362
Recoverable taxes 1,668 (59) (12)
Income tax and social contribution tax credits (555) (162) (71)
Escrow deposits (70) 1,538 11
Dividends received from investees 499 387 283
Concession contract and financial assets 713 688 511
Other (267) 187 26
 Total (increase) / decrease in assets 1,913 3,968 444
Suppliers 325 278 279
Taxes payable 5 824 (162)
Income tax and social contribution tax payable 1,206 690 1,433
Payroll and related charges 12 13 (84)
Regulatory charges 78 132 (89)
Advances from customers (81)
Post-employment obligations (422) (367) (343)
Others 101 106 4
Increase (decrease) in liabilities 1,305 1,676 957
Cash generated by operating activities 4,755 9,471 5,197
Interest paid on loans, financing and debentures (1,589) (1,081) (1,265)
Interest paid on lease contracts (3) (4) (5)
Income tax and social contribution tax paid (500) (240) (1,767)
Cash inflows from settlement of derivatives instruments 1,022 461 100
Net cash flows from continuing operating activities 3,685 8,607 2,260
Net cash flows used in discontinued operating activities   (224)
NET CASH FLOWS FROM OPERATING ACTIVITIES   8,607 2,036
INVESTING ACTIVITIES      
Marketable securities 2,047 (3,368) 79
Restricted cash 43 (51) 79
Investments      
Acquisition of equity investees (56) (120) (38)
Arising from the sale of equity interest, net of costs of sales 1,367
Cash arising from business combination 27
Loans to related parties (27) (6)
Property, plant and equipment (182) (132) (70)
Intangible assets (51) (41) (932)
Contract assets — distribution of gas and energy infrastructure (1,798) (1,364) (825)
Net cash flows used in continuing investment activities 1,370 (5,076) (1,813)
Net cash flows from discontinued investment activities 625
NET CASH FLOWS USED IN INVESTING ACTIVITIES 1,370 (5,076) (1,188)
FINANCING ACTIVITIES      
     Proceeds from Loans, financings and debentures, net from transaction costs 13 826 4,477
     Interest on capital and dividends paid (1,416) (598) (701)
Payment of loans, financing and debentures (4,437) (2,531) (4,883)
Payment of principal portion of lease liabilities (70) (84) (96)
NET CASH FLOWS USED IN FINANCING ACTIVITIES (5,910) (2,387) (1,203)
Net (decrease) increase in cash and cash equivalents for the year (855) 1,144 (355)
Cash and cash equivalents at the beginning of the year 1,680 536 891
Cash and cash equivalents at the end of the year R$ 825 R$ 1,680 R$ 536