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Concession Financial and Sector Assets and Liabilities (Tables) | 12 Months Ended
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Dec. 31, 2023
Concession Financial and Sector Assets and Liabilities |
Schedule of Financial Assets and Liabilities of Concession |
|  | 2023 |  |  | 2022 |
Concession financial assets related to the infrastructure |  |  |  |  |  |
Energy distribution concession (13.a) |  |  | 1,881 |  |  |  | 1,370 |
Gas distribution concession (13.a) |  |  | 38 |  |  |  | 37 |
Indemnifiable receivable – Generation (13.b) |  |  | 785 |  |  |  | 692 |
Concession grant fee – Generation concessions (13.c) |  |  | 3,031 |  |  |  | 2,950 |
|  |  | 5,735 |  |  |  | 5,049 |
Sector financial assets |  |  |  |  |  |
Amounts receivable from Parcel A (CVA) and Other Financial Components (13.d) |  |  | 805 |  |  |  | 944 |
Total |  |  | 6,540 |  |  |  | 5,993 |
Current assets |  |  | 814 |  |  |  | 1,055 |
Non-current assets |  |  | 5,726 |  |  |  | 4,938 |
Schedule of Changes in Concession Financial Assets | The changes in concession financial assets are as follows:
|  | Energy Distribution |  |  | Generation |  |  | Gas Distribution |  |  | Total |
Balances at December 31, 2020 |  |  | 530 |  |  |  | 3,365 |  |  |  | 29 |  |  |  | 3,924 |
Transfers from contract assets |  |  | 110 |  |  | - |  |  | - |  |  |  | 110 |
Transfers from (to) intangible assets |  |  | (9 | ) |  | - |  |  | - |  |  |  | (9 | )
Monetary updating |  |  | 54 |  |  |  | 523 |  |  |  | 5 |  |  |  | 582 |
Disposals |  |  | (1 | ) |  | - |  |  | - |  |  |  | (1 | )
Amounts received |  | - |  |  |  | (280 | ) |  | - |  |  |  | (280 | )
Balances at December 31, 2021 |  |  | 684 |  |  |  | 3,608 |  |  |  | 34 |  |  |  | 4,326 |
Transfers from contract assets |  |  | 670 |  |  |  | - |  |  |  | - |  |  |  | 670 |
Transfers from (to) intangible assets |  |  | (22 | ) |  |  | - |  |  |  | - |  |  |  | (22 | )
Monetary updating |  |  | 39 |  |  |  | 514 |  |  |  | 3 |  |  |  | 556 |
Fair Value Adjustments |  |  | - |  |  |  | (172 | ) |  |  | - |  |  |  | (172 | )
Disposals |  |  | (1 | ) |  |  | - |  |  |  | - |  |  |  | (1 | )
Amounts received |  |  | - |  |  |  | (308 | ) |  |  | - |  |  |  | (308 | )
Balances at December 31, 2022 |  |  | 1,370 |  |  |  | 3,642 |  |  |  | 37 |  |  |  | 5,049 |
Transfers from contract assets |  |  | 363 |  |  |  | - |  |  |  | - |  |  |  | 363 |
Disposals |  |  | 148 |  |  |  | 505 |  |  |  | 1 |  |  |  | 654 |
Amounts received |  |  | - |  |  |  | (331 | ) |  |  | - |  |  |  | (331 | )
Balances at December 31, 2023 |  |  | 1,881 |  |  |  | 3,816 |  |  |  | 38 |  |  |  | 5,735 |
Schedule of Generation Indemnity Receivable | The movement in the balance is as follows:
|  |  |  | (information of MW not audited) |  |  |  |  |  |  |  |  |
Generation plant |  | Concession expiration date |  | Installed capacity (MW) (information of MW not audited) |  | Net balance of assets on December 31, 2022 |  |  | Financial Update |  |  | Net balance of assets on December 31, 2023 |
Lot D |  |  |  |  |  |  |  |  |  |  |  | 203 |
UHE Três Marias |  | July 2015 |  | 396.00 |  | 179 |  |  |  | 24 |  |  |  |
UHE Salto Grande |  | July 2015 |  | 102.00 |  | 92 |  |  |  | 12 |  |  | 104 |
UHE Itutinga |  | July 2015 |  | 52.00 |  | 11 |  |  |  | 1 |  |  | 12 |
UHE Camargos |  | July 2015 |  | 46.00 |  | 21 |  |  |  | 3 |  |  | 24 |
PCH Piau |  | July 2015 |  | 18.01 |  | 5 |  |  |  | 1 |  |  | 6 |
PCH Gafanhoto |  | July 2015 |  | 14.00 |  | 6 |  |  |  | 1 |  |  | 7 |
PCH Peti |  | July 2015 |  | 9.40 |  | 6 |  |  |  | 1 |  |  | 7 |
PCH Dona Rita |  | Sep. 2013 |  | 2.41 |  | 2 |  |  |  | - |  |  | 2 |
PCH Tronqueiras |  | July 2015 |  | 8.50 |  | 9 |  |  |  | 1 |  |  | 10 |
PCH Joasal |  | July 2015 |  | 8.40 |  | 7 |  |  |  | 1 |  |  | 8 |
PCH Martins |  | July 2015 |  | 7.70 |  | 5 |  |  |  | 1 |  |  | 6 |
PCH Cajuru |  | July 2015 |  | 7.20 |  | 20 |  |  |  | 3 |  |  | 23 |
PCH Paciência |  | July 2015 |  | 4.08 |  | 4 |  |  |  | 1 |  |  | 5 |
PCH Marmelos |  | July 2015 |  | 4.00 |  | 3 |  |  |  | - |  |  | 3 |
Others |  |  |  |  |  |  |  |  |  |  |  |  |
UHE Volta Grande |  | Feb. 2017 |  | 380.00 |  |  | - |  |  |  | - |  |  |  | - |
UHE Miranda |  | Dec. 2016 |  | 408.00 |  | 97 |  |  |  | 13 |  |  | 110 |
UHE Jaguara |  | Aug. 2013 |  | 424.00 |  | 148 |  |  |  | 20 |  |  | 168 |
UHE São Simão |  | Jan. 2015 |  | 1,710.00 |  | 77 |  |  |  | 10 |  |  | 87 |
|  |  |  | 3,601.70 |  | 692 |  |  |  | 93 |  |  | 785 |
Schedule of Changes in Concession Financial Assets Related to Concession Grant Fee | The changes in concession financial assets are as follows:
SPE |  | Plants |  | 2022 |  |  | Monetary updating |  |  | Amounts received |  |  | 2023 |
Cemig Geração Três Marias S.A. |  | Três Marias |  |  | 1,672 |  |  |  | 222 |  |  |  | (178 | ) |  |  | 1,716 |
Cemig Geração Salto Grande S.A. |  | Salto Grande |  |  | 525 |  |  |  | 70 |  |  |  | (56 | ) |  |  | 539 |
Cemig Geração Itutinga S.A. |  | Itutinga |  |  | 198 |  |  |  | 30 |  |  |  | (24 | ) |  |  | 204 |
Cemig Geração Camargos S.A. |  | Camargos |  |  | 148 |  |  |  | 22 |  |  |  | (18 | ) |  |  | 152 |
Cemig Geração Sul S.A. |  | Coronel Domiciano, Joasal, Marmelos, Paciência e Piau |  |  | 195 |  |  |  | 31 |  |  |  | (25 | ) |  |  | 201 |
Cemig Geração Leste S.A. |  | Dona Rita, Ervália, Neblina, Peti, Sinceridade e Tronqueiras |  |  | 133 |  |  |  | 23 |  |  |  | (19 | ) |  |  | 137 |
Cemig Geração Oeste S.A. |  | Cajurú, Gafanhoto e Martins |  |  | 79 |  |  |  | 14 |  |  |  | (11 | ) |  |  | 82 |
Total |  |  |  |  | 2,950 |  |  |  | 412 |  |  |  | (331 | ) |  |  | 3,031 |
SPC |  | Plants |  | 2021 |  |  | Interest |  |  | Amounts received |  |  | 2022 |
CEMIG Geração Três Marias S.A. |  | Três Marias |  |  | 1,584 |  |  |  | 254 |  |  |  | (166 | ) |  |  | 1,672 |
CEMIG Geração Salto Grande S.A. |  | Salto Grande |  |  | 497 |  |  |  | 80 |  |  |  | (52 | ) |  |  | 525 |
CEMIG Geração Itutinga S.A. |  | Itutinga |  |  | 187 |  |  |  | 33 |  |  |  | (22 | ) |  |  | 198 |
CEMIG Geração Camargos S.A. |  | Camargos |  |  | 140 |  |  |  | 25 |  |  |  | (17 | ) |  |  | 148 |
CEMIG Geração Sul S.A. |  | Coronel Domiciano, Joasal, Marmelos, Paciência and Piau |  |  | 184 |  |  |  | 34 |  |  |  | (23 | ) |  |  | 195 |
CEMIG Geração Leste S.A. |  | Dona Rita, Ervália, Neblina, Peti, Sinceridade and Tronqueiras |  |  | 125 |  |  |  | 26 |  |  |  | (18 | ) |  |  | 133 |
CEMIG Geração Oeste S.A. |  | Cajurú, Gafanhoto and Martins |  |  | 75 |  |  |  | 15 |  |  |  | (11 | ) |  |  | 79 |
Total |  |  |  |  | 2,792 |  |  |  | 467 |  |  |  | (309 | ) |  |  | 2,950 |
SPC |  | Plants |  | 2020 |  |  | Interest |  |  | Amounts received |  |  | 2021 |
CEMIG Geração Três Marias S.A. |  | Três Marias |  |  | 1,447 |  |  |  | 287 |  |  |  | (150 | ) |  |  | 1,584 |
CEMIG Geração Salto Grande S.A. |  | Salto Grande |  |  | 454 |  |  |  | 90 |  |  |  | (47 | ) |  |  | 497 |
CEMIG Geração Itutinga S.A. |  | Itutinga |  |  | 171 |  |  |  | 37 |  |  |  | (21 | ) |  |  | 187 |
CEMIG Geração Camargos S.A. |  | Camargos |  |  | 128 |  |  |  | 27 |  |  |  | (15 | ) |  |  | 140 |
CEMIG Geração Sul S.A. |  | Coronel Domiciano, Joasal, Marmelos, Paciência and Piau |  |  | 167 |  |  |  | 38 |  |  |  | (21 | ) |  |  | 184 |
CEMIG Geração Leste S.A. |  | Dona Rita, Ervália, Neblina, Peti, Sinceridade and Tronqueiras |  |  | 114 |  |  |  | 27 |  |  |  | (16 | ) |  |  | 125 |
CEMIG Geração Oeste S.A. |  | Cajurú, Gafanhoto and Martins |  |  | 69 |  |  |  | 17 |  |  |  | (11 | ) |  |  | 75 |
Total |  |  |  |  | 2,550 |  |  |  | 523 |  |  |  | (281 | ) |  |  | 2,792 |
Schedule of Financial Assets and Financial Liabilities With the Tariff Adjustments | The balance of these sector financial assets and liabilities, which are presented at net value at net basis. The values disclosed may exhibit positive or negative amounts, upon their classification as assets or liabilities, respectively. Presentation of items at net value is required, wherein assets and liabilities are disclosed according their nature. The tariff adjustments that have been authorized or are to be ratified, are as follows:
Sectorial financial assets |  | Dec. 31, 2022 |  |  | Additions |  |  | Amortization |  |  | Remuneration |  |  | Transfer (2) |  |  | Dec. 31, 2023 |  |  | Amortization |  |  | Constitution |  |  | Current |  |  | Non-current |
CVA assets |  |  | (345 | ) |  |  | 1,597 |  |  |  | (2,527 | ) |  |  | 260 |  |  |  | 330 |  |  |  | (685 | ) |  |  | (434 | ) |  |  | (251 | ) |  |  | (584 | ) |  |  | (101 | )
Energy acquisition (CVA energy) |  |  | (1,787 | ) |  |  | 1,213 |  |  |  | (1,223 | ) |  |  | 161 |  |  |  | 527 |  |  |  | (1,109 | ) |  |  | (443 | ) |  |  | (666 | ) |  |  | (837 | ) |  |  | (272 | )
Itaipu energy costs |  |  | 594 |  |  |  | (40 | ) |  |  | (455 | ) |  |  | 44 |  |  |  | (114 | ) |  |  | 29 |  |  |  | 143 |  |  |  | (114 | ) |  |  | 75 |  |  |  | (46 | )
Program of Incentives for Alternative Electricity Sources – PROINFA |  |  | 31 |  |  |  | - |  |  |  | (42 | ) |  |  | 1 |  |  |  | (10 | ) |  |  | (20 | ) |  |  | (19 | ) |  |  | (1 | ) |  |  | (20 | ) |  |  | - |
Transport basic charges |  |  | 215 |  |  |  | 388 |  |  |  | (265 | ) |  |  | 40 |  |  |  | 35 |  |  |  | 413 |  |  |  | 114 |  |  |  | 299 |  |  |  | 291 |  |  |  | 122 |
Transport of Itaipu supply |  |  | 18 |  |  |  | 60 |  |  |  | (20 | ) |  |  | 4 |  |  |  | 5 |  |  |  | 67 |  |  |  | 14 |  |  |  | 53 |  |  |  | 45 |  |  |  | 22 |
System service charges – ESS |  |  | 583 |  |  |  | (24 | ) |  |  | (380 | ) |  |  | 7 |  |  |  | (248 | ) |  |  | (62 | ) |  |  | (242 | ) |  |  | 180 |  |  |  | (136 | ) |  |  | 74 |
CDE |  |  | 1 |  |  |  | - |  |  |  | (142 | ) |  |  | 3 |  |  |  | 135 |  |  |  | (3 | ) |  |  | (1 | ) |  |  | (2 | ) |  |  | (2 | ) |  |  | (1 | )
Other sectoral financial assets |  |  | 1,289 |  |  |  | 1,254 |  |  |  | (1,388 | ) |  |  | 205 |  |  |  | 130 |  |  |  | 1,490 |  |  |  | 523 |  |  |  | 967 |  |  |  | 1,077 |  |  |  | 413 |
Quotas from nuclear energy |  |  | 105 |  |  |  | 103 |  |  |  | (86 | ) |  |  | 16 |  |  |  | - |  |  |  | 138 |  |  |  | 51 |  |  |  | 87 |  |  |  | 102 |  |  |  | 36 |
Neutrality of Parcel A |  |  | 203 |  |  |  | 168 |  |  |  | (51 | ) |  |  | 5 |  |  |  | 61 |  |  |  | 386 |  |  |  | (29 | ) |  |  | 415 |  |  |  | 363 |  |  |  | 23 |
Energy over contracting (1) |  |  | 750 |  |  |  | 643 |  |  |  | (529 | ) |  |  | 58 |  |  |  | - |  |  |  | 922 |  |  |  | 349 |  |  |  | 573 |  |  |  | 688 |  |  |  | 234 |
Tariff refunds |  |  | (71 | ) |  |  | - |  |  |  | - |  |  |  | - |  |  |  | (17 | ) |  |  | (88 | ) |  |  | (25 | ) |  |  | (63 | ) |  |  | (67 | ) |  |  | (21 | )
Other |  |  | 302 |  |  |  | 340 |  |  |  | (722 | ) |  |  | 126 |  |  |  | 86 |  |  |  | 132 |  |  |  | 177 |  |  |  | (45 | ) |  |  | (9 | ) |  |  | 141 |
Total sectorial financial assets |  |  | 944 |  |  |  | 2,851 |  |  |  | (3,915 | ) |  |  | 465 |  |  |  | 460 |  |  |  | 805 |  |  |  | 89 |  |  |  | 716 |  |  |  | 493 |  |  |  | 312 |
Sectorial financial liabilities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
CVA liabilities |  |  | - |  |  |  | (1,706 | ) |  |  | 2,380 |  |  |  | (343 | ) |  |  | (331 | ) |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |
Energy acquisition (CVA energy) |  |  | - |  |  |  | (1,179 | ) |  |  | 1,941 |  |  |  | (234 | ) |  |  | (528 | ) |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |
Itaipu energy costs |  |  | - |  |  |  | (109 | ) |  |  | - |  |  |  | (5 | ) |  |  | 114 |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |
Program of Incentives for Alternative Electricity Sources – PROINFA |  |  | - |  |  |  | (31 | ) |  |  | 25 |  |  |  | (4 | ) |  |  | 10 |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |
Transport basic charges |  |  | - |  |  |  | - |  |  |  | 35 |  |  |  | - |  |  |  | (35 | ) |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |
Transport of Itaipu supply |  |  | - |  |  |  | - |  |  |  | 5 |  |  |  | - |  |  |  | (5 | ) |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |
System service charges – ESS |  |  | - |  |  |  | (506 | ) |  |  | 371 |  |  |  | (113 | ) |  |  | 248 |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |
CDE |  |  | - |  |  |  | 119 |  |  |  | 3 |  |  |  | 13 |  |  |  | (135 | ) |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |
Other sector financial liabilities |  |  | - |  |  |  | (729 | ) |  |  | 908 |  |  |  | (47 | ) |  |  | (132 | ) |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |
Neutrality of Parcel A |  |  | - |  |  |  | (58 | ) |  |  | 124 |  |  |  | (5 | ) |  |  | (61 | ) |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |
Tariff refunds |  |  | - |  |  |  | (88 | ) |  |  | 73 |  |  |  | (2 | ) |  |  | 17 |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |
Other |  |  | - |  |  |  | (583 | ) |  |  | 711 |  |  |  | (40 | ) |  |  | (88 | ) |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |
Total sector financial liabilities |  |  | - |  |  |  | (2,435 | ) |  |  | 3,288 |  |  |  | (390 | ) |  |  | (463 | ) |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |
Total sectoral financial assets and liabilities (net) |  |  | 944 |  |  |  | 416 |  |  |  | (627 | ) |  |  | 75 |  |  |  | (3 | ) |  |  | 805 |  |  |  | 89 |  |  |  | 716 |  |  |  | 493 |  |  |  | 312 |
(1) Reversal of the over contracting amounts passed on to consumers in the 2018 and 2019 tariff adjustments because they were previously recognized by ANEEL as involuntary over contracting, made possible by the publication of the involuntariness orders, recognizing over contracting as voluntary. Regarding the amount constituted in the period, there is a high volume of surplus energy, mainly due to the growing increase in the energy injected by MMGD facilities, settled at a low PLD. (2) In addition to the transfers between sectoral financial assets and liabilities, there was a transfer of R$1,550 to the "Other assets" group.
Changes in Balances of These Sector Assets and Liabilities | Changes in balances of sector financial assets and liabilities are as follow:
Balance on December 31, 2020 |  |  | (98 | )
Additions |  |  | 1,908 |
Amortization |  |  | 238 |
Transfer of other liabilities (1) |  |  | (15 | )
Updating - Selic rate (Note 29) |  |  | 64 |
Balance on December 31, 2021 |  |  | 2,097 |
Additions |  |  | (386 | )
Amortization |  |  | (761 | )
(-) Proceeds from loan - Water scarcity account |  |  | (191 | )
Updating - Selic rate (Note 29) |  |  | 185 |
Balance on December 31, 2022 |  |  | 944 |
Additions |  |  | 416 |
Amortization |  |  | (629 | )
(-) Proceeds from loan - Water scarcity account |  |  | (343 | )
Updating - Selic rate (Note 29) |  |  | 76 |
Balance on December 31, 2023 |  |  | 464 |
(11) Amounts relating to the reversal of the credits that could not be returned to customers in final billing, due to moderation of tariffs, as specified in §6 of Article 88 of REN 414/2010, included by REN 714/2016.

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