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16. CONCESSION FINANCIAL AND SECTOR ASSETS AND LIABILITIES (Tables) | 12 Months Ended
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Dec. 31, 2019
Disclosure Of Financial Assets And Liabilities Of The Concession [abstract] |
Schedule of financial assets and liabilities of concession |
Concession financial assets |  | 2019 |  |  |  | 2018 |
Energy distribution concession (16.1) |  | 460 |  |  |  | 396 |
Gas distribution concession (16.1) |  | 24 |  |  |  | – |
Indemnifiable receivable – Transmission (16.2) |  | 1,281 |  |  |  | 1,296 |
Indemnifiable receivable – Generation (16.3) |  | 816 |  |  |  | 816 |
Concession grant fee – Generation concessions (16.4) |  | 2,468 |  |  |  | 2,409 |
|  | 5,049 |  |  |  | 4,917 |
Concession sector assets |  | 2019 |  |  |  | 2018 |
Amounts receivable from Parcel A (CVA) and Other Financial Components (16.5) |  | 882 |  |  |  | 1,081 |
Total |  | 5,931 |  |  |  | 5,998 |
Current assets |  | 1,080 |  |  |  | 1,071 |
Non-current assets |  | 4,851 |  |  |  | 4,927 |
Schedule of changes in concession financial assets related to infrastructure | The changes in concession financial assets related to infrastructure are as follows:
|  | Transmission |  |  |  | Generation |  |  |  | Distribution |  |  |  | Gas |  |  |  | Total |
Balances at December 31, 2016 |  | 2,287 |  |  |  | 2,800 |  |  |  | 216 |  |  |  | – |  |  |  | 5,303 |
Additions |  | 25 |  |  |  | – |  |  |  | – |  |  |  | – |  |  |  | 25 |
Transfers of indemnity – plants not renewed |  | – |  |  |  | 1,082 |  |  |  | – |  |  |  | – |  |  |  | 1,082 |
Amounts received |  | (264 | ) |  |  | (232 | ) |  |  | – |  |  |  | – |  |  |  | (496 | )
Transfers between PP&E, Financial assets and Intangible assets |  | 2 |  |  |  | – |  |  |  | 146 |  |  |  | – |  |  |  | 148 |
Monetary updating |  | 224 |  |  |  | 317 |  |  |  | – |  |  |  | – |  |  |  | 541 |
Adjustment of expectation of cash flow from the Concession financial assets |  | 54 |  |  |  | – |  |  |  | 9 |  |  |  | – |  |  |  | 63 |
Disposals |  | (2 | ) |  |  | – |  |  |  | – |  |  |  | – |  |  |  | (2 | )
Adjustment of BRR of Transmission Assets |  | 149 |  |  |  | – |  |  |  | – |  |  |  | – |  |  |  | 149 |
Adjustment on indemnities of plants not renewed (Ministerial Order 291) – including financial updating |  | – |  |  |  | 271 |  |  |  | – |  |  |  | – |  |  |  | 271 |
Balances at December 31, 2017 |  | 2,475 |  |  |  | 4,238 |  |  |  | 371 |  |  |  | – |  |  |  | 7,084 |
Effects of first-time adoption of IFRS 15 |  | (1,092 | ) |  |  | – |  |  |  | – |  |  |  | – |  |  |  | (1,092 | )
Amounts received |  | (249 | ) |  |  | (1,389 | ) |  |  | – |  |  |  | – |  |  |  | (1,638 | )
Transfers from PP&E |  | – |  |  |  | – |  |  |  | 27 |  |  |  | – |  |  |  | 27 |
Others transfers |  | – |  |  |  | (1 | ) |  |  | (1 | ) |  |  | – |  |  |  | (2 | )
Monetary updating |  | 162 |  |  |  | 377 |  |  |  | – |  |  |  | – |  |  |  | 539 |
Disposals |  | – |  |  |  | – |  |  |  | (1 | ) |  |  | – |  |  |  | (1 | )
Balances at December 31, 2018 |  | 1,296 |  |  |  | 3,225 |  |  |  | 396 |  |  |  | – |  |  |  | 4,917 |
Amounts received |  | (181 | ) |  |  | (259 | ) |  |  | – |  |  |  | – |  |  |  | (440 | )
Transfers from contract assets |  | 44 |  |  |  | – |  |  |  | 48 |  |  |  | – |  |  |  | 92 |
Transfers from (to) intangible assets |  | – |  |  |  | – |  |  |  | (1 | ) |  |  | 24 |  |  |  | 23 |
Monetary updating |  | 122 |  |  |  | 318 |  |  |  | 18 |  |  |  | – |  |  |  | 458 |
Disposals |  | – |  |  |  | – |  |  |  | (1 | ) |  |  | – |  |  |  | (1 | )
Balances at December 31, 2019 |  | 1,281 |  |  |  | 3,284 |  |  |  | 460 |  |  |  | 24 |  |  |  | 5,049 |
Schedule of generation indemnity receivable | These balances are recorded as financial assets at fair value through profit or loss, and totaled R$ 816 on December 31, 2019 and 2018.
Generation plant |  | Concession expiration date |  | Installed capacity (MW) |  | Net balance of assets based on historical cost |  | Net balance of assets based on fair value (replacement cost)
Lot D |  |  |  |  |  |  |  |  |  |  |  |  |  |
UHE Três Marias |  | July 2015 |  |  | 396 |  |  |  | 71 |  |  |  | 413 |
UHE Salto Grande |  | July 2015 |  |  | 102 |  |  |  | 11 |  |  |  | 39 |
UHE Itutinga |  | July 2015 |  |  | 52 |  |  |  | 3 |  |  |  | 7 |
UHE Camargos |  | July 2015 |  |  | 46 |  |  |  | 8 |  |  |  | 23 |
PCH Piau |  | July 2015 |  |  | 18.01 |  |  |  | 2 |  |  |  | 9 |
PCH Gafanhoto |  | July 2015 |  |  | 14 |  |  |  | 1 |  |  |  | 10 |
PCH Peti |  | July 2015 |  |  | 9.4 |  |  |  | 1 |  |  |  | 8 |
PCH Dona Rita |  | Sep. 2013 |  |  | 2.41 |  |  |  | 1 |  |  |  | 1 |
PCH Tronqueiras |  | July 2015 |  |  | 8.5 |  |  |  | 2 |  |  |  | 12 |
PCH Joasal |  | July 2015 |  |  | 8.4 |  |  |  | 1 |  |  |  | 8 |
PCH Martins |  | July 2015 |  |  | 7.7 |  |  |  | 2 |  |  |  | 4 |
PCH Cajuru |  | July 2015 |  |  | 7.2 |  |  |  | 4 |  |  |  | 4 |
PCH Paciência |  | July 2015 |  |  | 4.08 |  |  |  | 1 |  |  |  | 4 |
PCH Marmelos |  | July 2015 |  |  | 4 |  |  |  | 1 |  |  |  | 4 |
Others |  |  |  |  |  |  |  |  |  |  |  |  |  |
UHE Volta Grande |  | Feb. 2017 |  |  | 380 |  |  |  | 26 |  |  |  | 70 |
UHE Miranda (1) |  | Dec. 2016 |  |  | 408 |  |  |  | 27 |  |  |  | 23 |
UHE Jaguara (1) |  | Aug. 2013 |  |  | 424 |  |  |  | 40 |  |  |  | 174 |
UHE São Simão (1) |  | Jan. 2015 |  |  | 1,710 |  |  |  | 2 |  |  |  | 3 |
|  |  |  |  | 3,601.70 |  |  |  | 204 |  |  |  | 816 |
(1) | Investments made after the Jaguara, São Simão and Miranda plants came into operation, in the amounts of R$174, R$3 and R$23, respectively, are recorded as concession financial assets, and the determination of the final amounts to be paid to the Company is in a process of discussion with Aneel (the regulator). Company does not expect losses in realization of these amounts.
Schedule of auction won transferred to related specific purpose companies | The changes in these concession financial assets are as follows:
SPE | Plants |  | 2018 |  |  |  | Monetary updating |  |  |  | Amounts received |  |  |  | 2019 |
Cemig Geração Três Marias S.A. | Três Marias |  | 1,370 |  |  |  | 171 |  |  |  | (139 | ) |  |  | 1,402 |
Cemig Geração Salto Grande S.A. | Salto Grande |  | 430 |  |  |  | 54 |  |  |  | (44 | ) |  |  | 440 |
Cemig Geração Itutinga S.A. | Itutinga |  | 161 |  |  |  | 23 |  |  |  | (19 | ) |  |  | 165 |
Cemig Geração Camargos S.A. | Camargos |  | 120 |  |  |  | 17 |  |  |  | (13 | ) |  |  | 124 |
Cemig Geração Sul S.A. | Coronel Domiciano, Joasal, Marmelos, Paciência and Piau |  | 157 |  |  |  | 24 |  |  |  | (20 | ) |  |  | 161 |
Cemig Geração Leste S.A. | Dona Rita, Ervália, Neblina, Peti, Sinceridade and Tronqueiras |  | 107 |  |  |  | 18 |  |  |  | (15 | ) |  |  | 110 |
Cemig Geração Oeste S.A. | Cajurú, Gafanhoto and Martins |  | 64 |  |  |  | 11 |  |  |  | (9 | ) |  |  | 66 |
Total |  |  | 2,409 |  |  |  | 318 |  |  |  | (259 | ) |  |  | 2,468 |
SPE | Plants |  | 2017 |  |  |  | Monetary updating |  |  |  | Amounts received |  |  |  | 2018 |
Cemig Geração Três Marias S.A. | Três Marias |  | 1,330 |  |  |  | 174 |  |  |  | (134 | ) |  |  | 1,370 |
Cemig Geração Salto Grande S.A. | Salto Grande |  | 417 |  |  |  | 55 |  |  |  | (42 | ) |  |  | 430 |
Cemig Geração Itutinga S.A. | Itutinga |  | 156 |  |  |  | 23 |  |  |  | (18 | ) |  |  | 161 |
Cemig Geração Camargos S.A. | Camargos |  | 116 |  |  |  | 17 |  |  |  | (13 | ) |  |  | 120 |
Cemig Geração Sul S.A. | Coronel Domiciano, Joasal, Marmelos, Paciência and Piau |  | 152 |  |  |  | 24 |  |  |  | (19 | ) |  |  | 157 |
Cemig Geração Leste S.A. | Dona Rita, Ervália, Neblina, Peti, Sinceridade and Tronqueiras |  | 103 |  |  |  | 18 |  |  |  | (14 | ) |  |  | 107 |
Cemig Geração Oeste S.A. | Cajurú, Gafanhoto and Martins |  | 63 |  |  |  | 11 |  |  |  | (10 | ) |  |  | 64 |
Total |  |  | 2,337 |  |  |  | 322 |  |  |  | (250 | ) |  |  | 2,409 |
SPE | Plants |  | 2016 |  |  |  | Monetary updating |  |  |  | Amounts received |  |  |  | 2017 |
Cemig Geração Três Marias S.A. | Três Marias |  | 1,283 |  |  |  | 172 |  |  |  | (125 | ) |  |  | 1,330 |
Cemig Geração Salto Grande S.A. | Salto Grande |  | 403 |  |  |  | 54 |  |  |  | (40 | ) |  |  | 417 |
Cemig Geração Itutinga S.A. | Itutinga |  | 150 |  |  |  | 23 |  |  |  | (17 | ) |  |  | 156 |
Cemig Geração Camargos S.A. | Camargos |  | 112 |  |  |  | 17 |  |  |  | (13 | ) |  |  | 116 |
Cemig Geração Sul S.A. | Coronel Domiciano, Joasal, Marmelos, Paciência, Piau |  | 147 |  |  |  | 23 |  |  |  | (18 | ) |  |  | 152 |
Cemig Geração Leste S.A. | Dona Rita, Ervália, Neblina, Peti, Sinceridade, Tronqueiras |  | 99 |  |  |  | 17 |  |  |  | (13 | ) |  |  | 103 |
Cemig Geração Oeste S.A. | Cajurú, Gafanhoto, Martins |  | 60 |  |  |  | 11 |  |  |  | (8 | ) |  |  | 63 |
Total |  |  | 2,254 |  |  |  | 317 |  |  |  | (234 | ) |  |  | 2,337 |
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, in assets or liabilities, in accordance with the tariff adjustments that have been authorized or are to be ratified, are as follows:
|  | 2019 |  |  |  | 2018 |
Financial position |  | Amounts ratified by Aneel in the last tariff adjustment |  |  |  | Amounts to be ratified by Aneel in the next tariff adjustments |  |  |  | Total |  |  |  | Amounts ratified by Aneel in the last tariff adjustment |  |  |  | Amounts to be ratified by Aneel in the next tariff adjustments |  |  |  | Total |
Assets |  | 1,286 |  |  |  | 2,144 |  |  |  | 3,430 |  |  |  | 1,184 |  |  |  | 2,545 |  |  |  | 3,729 |
Current assets |  | 1,286 |  |  |  | 1,269 |  |  |  | 2,555 |  |  |  | 1,184 |  |  |  | 1,505 |  |  |  | 2,689 |
Non-current assets |  | – |  |  |  | 875 |  |  |  | 875 |  |  |  | – |  |  |  | 1,040 |  |  |  | 1,040 |
Liabilities |  | (882 | ) |  |  | (1,666 | ) |  |  | (2,548 | ) |  |  | (1,140 | ) |  |  | (1,509 | ) |  |  | (2,649 | )
Current liabilities |  | (882 | ) |  |  | (1,033 | ) |  |  | (1,915 | ) |  |  | (1,140 | ) |  |  | (902 | ) |  |  | (2,042 | )
Non-current liabilities |  | – |  |  |  | (633 | ) |  |  | (633 | ) |  |  | – |  |  |  | (607 | ) |  |  | (607 | )
Total current, net |  | 404 |  |  |  | 236 |  |  |  | 640 |  |  |  | 44 |  |  |  | 603 |  |  |  | 647 |
Total non-current, net |  | – |  |  |  | 242 |  |  |  | 242 |  |  |  | – |  |  |  | 433 |  |  |  | 433 |
Total, net |  | 404 |  |  |  | 478 |  |  |  | 882 |  |  |  | 44 |  |  |  | 1,036 |  |  |  | 1,080 |
|  | 2019 |  |  |  | 2018 |
Financial components |  | Amounts ratified by Aneel in the last tariff adjustment |  |  |  | Amounts to be ratified by Aneel in the next tariff adjustments |  |  |  | Total |  |  |  | Amounts ratified by Aneel in the last tariff adjustment |  |  |  | Amounts to be ratified by Aneel in the next tariff adjustments |  |  |  | Total |
Items of ‘Parcel A’ |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Energy Development Account (CDE) quota |  | 119 |  |  |  | 29 |  |  |  | 148 |  |  |  | 1 |  |  |  | 220 |  |  |  | 221 |
Tariff for use of transmission facilities of grid participants |  | (18 | ) |  |  | 114 |  |  |  | 96 |  |  |  | 24 |  |  |  | (6 | ) |  |  | 18 |
Tariff for transport of Itaipu supply |  | 9 |  |  |  | 16 |  |  |  | 25 |  |  |  | 2 |  |  |  | 16 |  |  |  | 18 |
Alternative power source program (Proinfa) |  | 11 |  |  |  | (6 | ) |  |  | 5 |  |  |  | 3 |  |  |  | 5 |  |  |  | 8 |
ESS/EER System Service/Energy Charges |  | (161 | ) |  |  | (136 | ) |  |  | (297 | ) |  |  | (246 | ) |  |  | (287 | ) |  |  | (533 | )
Energy bought for resale |  | 661 |  |  |  | 632 |  |  |  | 1,293 |  |  |  | 667 |  |  |  | 1,402 |  |  |  | 2,069 |
Other financial components |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Over contracting of supply (1) |  | (84 | ) |  |  | 216 |  |  |  | 132 |  |  |  | (204 | ) |  |  | (13 | ) |  |  | (217 | )
Neutrality of Parcel A |  | (30 | ) |  |  | (12 | ) |  |  | (42 | ) |  |  | 53 |  |  |  | (15 | ) |  |  | 38 |
Other financial items |  | (71 | ) |  |  | (206 | ) |  |  | (277 | ) |  |  | (236 | ) |  |  | (212 | ) |  |  | (448 | )
Tariff Flag balances (2) |  | - |  |  |  | (103 | ) |  |  | (103 | ) |  |  | - |  |  |  | (11 | ) |  |  | (11 | )
Excess demand and reactive power |  | (32 | ) |  |  | (66 | ) |  |  | (98 | ) |  |  | (21 | ) |  |  | (62 | ) |  |  | (83 | )
TOTAL |  | 404 |  |  |  | 478 |  |  |  | 882 |  |  |  | 43 |  |  |  | 1,037 |  |  |  | 1,080 |
(1) | The wholly-owned subsidiary Cemig D was over contracted in 2017 and 2018 and the gain arising from the sale of the excess of energy in the spot market was provisionally passed through to customers by Aneel in the tariff adjustments of 2018 and 2019, including the portion in excess of the limit of 105% of the regulatory load – thus reducing the tariff that was determined. To establish whether this is a voluntary over contracting, the Company considers that the portion above the regulatory limit will be recovered in the subsequent tariff adjustment, when Aneel approves them. The Company has no expectation of loss in relation to realization of these amounts. The Company recognizes this right, in the amount of R$ 216,852, as ‘Other financial components’, to be approved by Aneel in the next forthcoming tariff adjustments.
(2) | Billing arising from the ‘Flag’ Tariff System (see below) not yet approved by the regulator (Aneel).
Schedule of changes in balances of financial assets and liabilities | Changes in balances of these sector assets and liabilities:
Balance at December 31, 2016 |  | (407 | )
Additions |  | 811 |
Amortization |  | 177 |
Payments from the Flag Tariff Centralizing Account |  | (586 | )
Updating – Selic rate (Note 31) |  | (41 | )
Balance at December 31, 2017 |  | (46 | )
Additions |  | 1,638 |
Amortization |  | 335 |
Others – R&D Reimbursement |  | (115 | )
Payments from the Flag Tariff Centralizing Account |  | (794 | )
Updating – Selic rate (Note 31) |  | 62 |
Balance at December 31, 2018 |  | 1,080 |
Additions |  | 724 |
Amortization |  | (666 | )
Payments from the Flag Tariff Centralizing Account |  | (361 | )
Updating – Selic rate (Note 31) |  | 105 |
Balance at December 31, 2019 |  | 882 |

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