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18. INVESTMENTS (Details 2) - BRL (R$) R$ in Millions | 12 Months Ended
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Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Disclosure of detailed information about investment property [line items] |  |  |  |  |  |  |
Beginning balance |  | R$ 5,235 |  | R$ 7,792 |  | R$ 8,694 |
Gain (loss) by equity method (Income statement) |  | 125 |  | (104) |  | (252) |
Remeasurement of previously held equity interest in subsidiaries acquired (step- acquisition) |  | 268 |  | (119) |  |  |
Dividends |  | (284) |  | (354) |  | (420) |
Additions / acquisitions |  | 33 |  | 511 |  | 292 |
Other |  | 1 |  | (626) |  | 88 |
Disposals |  |  |  | (37) |  | (569) |
Reclassification to held for sale |  |  |  | (1,828) |  |  |
Gain (loss) by equity method (Other comprehensive income) |  |  |  |  |  | (41) |
Ending balance |  | 5,378 |  | 5,235 |  | 7,792 |
Companhia Transleste De Transmissao [Member] |  |  |  |  |  |  |
Disclosure of detailed information about investment property [line items] |  |  |  |  |  |  |
Beginning balance |  |  |  |  |  | 22 |
Gain (loss) by equity method (Income statement) |  |  |  |  |  | 5 |
Dividends |  |  |  |  |  | (7) |
Additions / acquisitions |  |  |  |  |  |  |
Other |  |  |  |  |  |  |
Disposals |  |  |  |  |  | (20) |
Gain (loss) by equity method (Other comprehensive income) |  |  |  |  |  |  |
Ending balance |  |  |  |  |  |  |
Companhia Transudeste De Transmissao [Member] |  |  |  |  |  |  |
Disclosure of detailed information about investment property [line items] |  |  |  |  |  |  |
Beginning balance |  |  |  |  |  | 21 |
Gain (loss) by equity method (Income statement) |  |  |  |  |  | 3 |
Dividends |  |  |  |  |  | (12) |
Additions / acquisitions |  |  |  |  |  |  |
Other |  |  |  |  |  |  |
Disposals |  |  |  |  |  | (12) |
Gain (loss) by equity method (Other comprehensive income) |  |  |  |  |  |  |
Ending balance |  |  |  |  |  |  |
Companhia Transirape De Transmissao [Member] |  |  |  |  |  |  |
Disclosure of detailed information about investment property [line items] |  |  |  |  |  |  |
Beginning balance |  |  |  |  |  | 24 |
Gain (loss) by equity method (Income statement) |  |  |  |  |  | 4 |
Dividends |  |  |  |  |  | (6) |
Additions / acquisitions |  |  |  |  |  |  |
Other |  |  |  |  |  |  |
Disposals |  |  |  |  |  | (22) |
Gain (loss) by equity method (Other comprehensive income) |  |  |  |  |  |  |
Ending balance |  |  |  |  |  |  |
Companhia De Transmissao Centroeste De Minas [Member] |  |  |  |  |  |  |
Disclosure of detailed information about investment property [line items] |  |  |  |  |  |  |
Beginning balance |  | 20 |  | 21 |  | 21 |
Gain (loss) by equity method (Income statement) |  | 4 |  | 5 |  | 5 |
Remeasurement of previously held equity interest in subsidiaries acquired (step- acquisition) |  |  |  |  |  |  |
Dividends |  |  |  | (6) |  | (5) |
Additions / acquisitions |  |  |  |  |  |  |
Other |  |  |  |  |  |  |
Disposals |  |  |  |  |  |  |
Reclassification to held for sale |  |  |  |  |  |  |
Gain (loss) by equity method (Other comprehensive income) |  |  |  |  |  |  |
Ending balance |  | 24 |  | 20 |  | 21 |
Light [Member] |  |  |  |  |  |  |
Disclosure of detailed information about investment property [line items] |  |  |  |  |  |  |
Beginning balance |  |  | [1] | 1,534 | [1] | 1,070 | [2]
Gain (loss) by equity method (Income statement) |  |  |  | 19 | [1] | 35 | [2]
Remeasurement of previously held equity interest in subsidiaries acquired (step- acquisition) | [1] |  |  | (231) |  |  |
Dividends |  |  |  | (8) | [1] |  | [2]
Additions / acquisitions |  |  |  |  | [1] |  | [2]
Other |  |  |  | (59) | [1] | 432 | [2]
Disposals |  |  |  |  | [1] |  | [2]
Reclassification to held for sale | [1] |  |  | (1,255) |  |  |
Gain (loss) by equity method (Other comprehensive income) | [2] |  |  |  |  | (3) |
Ending balance | [1] |  |  |  |  | 1,534 |
Axxiom Solucoes Tecnologicas [Member] |  |  |  |  |  |  |
Disclosure of detailed information about investment property [line items] |  |  |  |  |  |  |
Beginning balance |  |  | [1] | 12 | [1] | 19 |
Gain (loss) by equity method (Income statement) |  |  |  | (7) | [1] | (7) |
Remeasurement of previously held equity interest in subsidiaries acquired (step- acquisition) |  | 4 |  |  | [1] |  |
Dividends |  |  |  |  | [1] |  |
Additions / acquisitions |  | 9 |  |  | [1] |  |
Other |  |  |  | (1) | [1] |  |
Disposals |  |  |  |  | [1] |  |
Reclassification to held for sale | [1] |  |  | (4) |  |  |
Gain (loss) by equity method (Other comprehensive income) |  |  |  |  |  |  |
Ending balance |  | 13 |  |  | [1] | 12 | [1]
Lepsa [Member] |  |  |  |  |  |  |
Disclosure of detailed information about investment property [line items] |  |  |  |  |  |  |
Beginning balance | [2] |  |  |  |  | 344 |
Gain (loss) by equity method (Income statement) | [2] |  |  |  |  |  |
Dividends | [2] |  |  |  |  |  |
Additions / acquisitions | [2] |  |  |  |  |  |
Other | [2] |  |  |  |  | (342) |
Disposals | [2] |  |  |  |  |  |
Gain (loss) by equity method (Other comprehensive income) | [2] |  |  |  |  | (2) |
Ending balance | [2] |  |  |  |  |  |
RME [Member] |  |  |  |  |  |  |
Disclosure of detailed information about investment property [line items] |  |  |  |  |  |  |
Beginning balance |  |  | [1] | 383 | [1] | 339 |
Gain (loss) by equity method (Income statement) |  |  |  | 3 | [1] | 7 |
Remeasurement of previously held equity interest in subsidiaries acquired (step- acquisition) | [1] |  |  | (52) |  |  |
Dividends |  |  |  | (1) | [1] |  |
Additions / acquisitions |  |  |  | 104 | [1] | 38 |
Other |  |  |  | (111) | [1] | 1 |
Disposals |  |  |  |  | [1] |  |
Reclassification to held for sale | [1] |  |  | (326) |  |  |
Gain (loss) by equity method (Other comprehensive income) |  |  |  |  |  | (2) |
Ending balance | [1] |  |  |  |  | 383 |
Hidreletrica Cachoeirao [Member] |  |  |  |  |  |  |
Disclosure of detailed information about investment property [line items] |  |  |  |  |  |  |
Beginning balance |  | 49 |  | 58 |  | 50 |
Gain (loss) by equity method (Income statement) |  | 11 |  | 10 |  | 10 |
Remeasurement of previously held equity interest in subsidiaries acquired (step- acquisition) |  |  |  |  |  |  |
Dividends |  | (6) |  | (19) |  | (3) |
Additions / acquisitions |  |  |  |  |  |  |
Other |  |  |  |  |  | 1 |
Disposals |  |  |  |  |  |  |
Reclassification to held for sale |  |  |  |  |  |  |
Gain (loss) by equity method (Other comprehensive income) |  |  |  |  |  |  |
Ending balance |  | 54 |  | 49 |  | 58 |
Guanhaes Energia [Member] |  |  |  |  |  |  |
Disclosure of detailed information about investment property [line items] |  |  |  |  |  |  |
Beginning balance |  |  | [1] | 25 | [1],[3] |  | [3]
Gain (loss) by equity method (Income statement) |  |  |  | 30 | [1] | (13) | [3]
Remeasurement of previously held equity interest in subsidiaries acquired (step- acquisition) |  | 131 |  |  | [1] |  |
Dividends |  |  |  |  | [1] |  | [3]
Additions / acquisitions |  |  |  | 57 | [1] | 97 | [3]
Other |  |  |  |  | [1] | (59) | [3]
Disposals |  |  |  |  | [1] |  | [3]
Reclassification to held for sale | [1] |  |  | (112) |  |  |
Gain (loss) by equity method (Other comprehensive income) | [3] |  |  |  |  |  |
Ending balance |  | 131 |  |  | [1] | 25 | [1],[3]
Hidreletrica Pipoca [Member] |  |  |  |  |  |  |
Disclosure of detailed information about investment property [line items] |  |  |  |  |  |  |
Beginning balance |  | 31 |  | 26 |  | 32 |
Gain (loss) by equity method (Income statement) |  | 4 |  | 7 |  | 2 |
Remeasurement of previously held equity interest in subsidiaries acquired (step- acquisition) |  |  |  |  |  |  |
Dividends |  | (4) |  | (2) |  | (8) |
Additions / acquisitions |  |  |  |  |  |  |
Other |  |  |  |  |  |  |
Disposals |  |  |  |  |  |  |
Reclassification to held for sale |  |  |  |  |  |  |
Gain (loss) by equity method (Other comprehensive income) |  |  |  |  |  |  |
Ending balance |  | 31 |  | 31 |  | 26 |
Madeira Energia (Santo Antonio plant) [Member] |  |  |  |  |  |  |
Disclosure of detailed information about investment property [line items] |  |  |  |  |  |  |
Beginning balance |  | 270 | [4],[5] | 535 | [4],[5] | 644 |
Gain (loss) by equity method (Income statement) |  | (103) |  | (163) | [4],[5] | (109) |
Remeasurement of previously held equity interest in subsidiaries acquired (step- acquisition) |  |  |  |  | [4],[5] |  |
Dividends |  |  |  |  | [4],[5] |  |
Additions / acquisitions |  |  |  | 25 | [4],[5] |  |
Other |  |  |  | (127) | [4],[5] |  |
Disposals |  |  |  |  | [4],[5] |  |
Reclassification to held for sale | [4],[5] |  |  |  |  |  |
Gain (loss) by equity method (Other comprehensive income) |  |  |  |  |  |  |
Ending balance |  | 167 |  | 270 | [4],[5] | 535 | [4],[5]
FIP Melbourne (Santo Antonio plant) [Member] |  |  |  |  |  |  |
Disclosure of detailed information about investment property [line items] |  |  |  |  |  |  |
Beginning balance |  | 470 | [5] | 582 | [5] | 677 |
Gain (loss) by equity method (Income statement) |  |  |  | (139) | [5] | (95) |
Remeasurement of previously held equity interest in subsidiaries acquired (step- acquisition) | [5] |  |  |  |  |  |
Dividends |  |  |  |  | [5] |  |
Additions / acquisitions |  |  |  | 27 | [5] |  |
Other |  |  |  |  | [5] |  |
Disposals |  |  |  |  | [5] |  |
Reclassification to held for sale | [5] |  |  |  |  |  |
Gain (loss) by equity method (Other comprehensive income) |  |  |  |  |  |  |
Ending balance |  | 385 |  | 470 | [5] | 582 | [5]
Lightger [Member] |  |  |  |  |  |  |
Disclosure of detailed information about investment property [line items] |  |  |  |  |  |  |
Beginning balance |  |  | [1] | 41 | [1] | 42 |
Gain (loss) by equity method (Income statement) |  |  |  | 3 | [1] | 2 |
Remeasurement of previously held equity interest in subsidiaries acquired (step- acquisition) |  | 128 |  | 84 | [1] |  |
Dividends |  |  |  | (2) | [1] | (3) |
Additions / acquisitions |  |  |  |  | [1] |  |
Other |  |  |  |  | [1] |  |
Disposals |  |  |  |  | [1] |  |
Reclassification to held for sale | [1] |  |  | (126) |  |  |
Gain (loss) by equity method (Other comprehensive income) |  |  |  |  |  |  |
Ending balance |  | 128 |  |  | [1] | 41 | [1]
Baguari Energia [Member] |  |  |  |  |  |  |
Disclosure of detailed information about investment property [line items] |  |  |  |  |  |  |
Beginning balance |  | 162 |  | 148 |  | 162 |
Gain (loss) by equity method (Income statement) |  | 22 |  | 28 |  | 17 |
Remeasurement of previously held equity interest in subsidiaries acquired (step- acquisition) |  |  |  |  |  |  |
Dividends |  | (27) |  | (15) |  | (30) |
Additions / acquisitions |  |  |  |  |  |  |
Other |  |  |  | 1 |  | (1) |
Disposals |  |  |  |  |  |  |
Reclassification to held for sale |  |  |  |  |  |  |
Gain (loss) by equity method (Other comprehensive income) |  |  |  |  |  |  |
Ending balance |  | 157 |  | 162 |  | 148 |
Central Eolica Praias De Parajuru [Member] |  |  |  |  |  |  |
Disclosure of detailed information about investment property [line items] |  |  |  |  |  |  |
Beginning balance |  |  | [6] | 60 | [6] | 63 |
Gain (loss) by equity method (Income statement) |  |  |  | (6) | [6] | (1) |
Remeasurement of previously held equity interest in subsidiaries acquired (step- acquisition) | [6] |  |  | 21 |  |  |
Dividends |  |  |  |  | [6] |  |
Additions / acquisitions |  |  |  | 74 | [6] |  |
Other |  |  |  | (146) | [6] | (2) |
Disposals |  |  |  | (3) | [6] |  |
Reclassification to held for sale | [6] |  |  |  |  |  |
Gain (loss) by equity method (Other comprehensive income) |  |  |  |  |  |  |
Ending balance | [6] |  |  |  |  | 60 |
Central Eolica Volta do Rio [Member] |  |  |  |  |  |  |
Disclosure of detailed information about investment property [line items] |  |  |  |  |  |  |
Beginning balance |  |  | [6] | 68 | [6] | 81 |
Gain (loss) by equity method (Income statement) |  |  |  | (16) | [6] | (12) |
Remeasurement of previously held equity interest in subsidiaries acquired (step- acquisition) | [6] |  |  | 59 |  |  |
Dividends |  |  |  |  | [6] |  |
Additions / acquisitions |  |  |  | 92 | [6] |  |
Other |  |  |  | (181) | [6] | (1) |
Disposals |  |  |  | (22) | [6] |  |
Reclassification to held for sale | [6] |  |  |  |  |  |
Gain (loss) by equity method (Other comprehensive income) |  |  |  |  |  |  |
Ending balance | [6] |  |  |  |  | 68 |
Central Eolica Praias De Morgado [Member] |  |  |  |  |  |  |
Disclosure of detailed information about investment property [line items] |  |  |  |  |  |  |
Beginning balance |  |  | [6] | 51 | [6] | 60 |
Gain (loss) by equity method (Income statement) |  |  |  | (15) | [6] | (8) |
Remeasurement of previously held equity interest in subsidiaries acquired (step- acquisition) | [6] |  |  |  |  |  |
Dividends |  |  |  |  | [6] |  |
Additions / acquisitions |  |  |  |  | [6] |  |
Other |  |  |  | (24) | [6] | (1) |
Disposals |  |  |  | (12) | [6] |  |
Reclassification to held for sale | [6] |  |  |  |  |  |
Gain (loss) by equity method (Other comprehensive income) |  |  |  |  |  |  |
Ending balance | [6] |  |  |  |  | 51 |
Amazonia Energia (Belo Monte plant) [Member] |  |  |  |  |  |  |
Disclosure of detailed information about investment property [line items] |  |  |  |  |  |  |
Beginning balance |  | 1,013 |  | 867 |  | 781 |
Gain (loss) by equity method (Income statement) |  | 15 |  | 80 |  | 1 |
Remeasurement of previously held equity interest in subsidiaries acquired (step- acquisition) |  |  |  |  |  |  |
Dividends |  |  |  |  |  |  |
Additions / acquisitions |  |  |  | 69 |  | 85 |
Other |  |  |  | (3) |  |  |
Disposals |  |  |  |  |  |  |
Reclassification to held for sale |  |  |  |  |  |  |
Gain (loss) by equity method (Other comprehensive income) |  |  |  |  |  |  |
Ending balance |  | 1,028 |  | 1,013 |  | 867 |
Ativas Data Center [Member] |  |  |  |  |  |  |
Disclosure of detailed information about investment property [line items] |  |  |  |  |  |  |
Beginning balance |  | 16 |  | 17 |  | 18 |
Gain (loss) by equity method (Income statement) |  |  |  | (1) |  | (2) |
Remeasurement of previously held equity interest in subsidiaries acquired (step- acquisition) |  |  |  |  |  |  |
Dividends |  |  |  |  |  |  |
Additions / acquisitions |  |  |  |  |  |  |
Other |  |  |  |  |  | 1 |
Disposals |  |  |  |  |  |  |
Reclassification to held for sale |  |  |  |  |  |  |
Gain (loss) by equity method (Other comprehensive income) |  |  |  |  |  |  |
Ending balance |  | 16 |  | 16 |  | 17 |
TAESA [Member] |  |  |  |  |  |  |
Disclosure of detailed information about investment property [line items] |  |  |  |  |  |  |
Beginning balance |  | 1,143 | [1] | 1,101 | [1] | 1,583 | [7]
Gain (loss) by equity method (Income statement) |  | 210 |  | 225 | [1] | 216 | [7]
Remeasurement of previously held equity interest in subsidiaries acquired (step- acquisition) |  |  |  |  | [1] |  |
Dividends |  | (141) |  | (208) | [1] | (183) | [7]
Additions / acquisitions |  |  |  |  | [1] |  | [7]
Other |  | 1 |  | 25 | [1] |  | [7]
Disposals |  |  |  |  | [1] | (515) | [7]
Reclassification to held for sale | [1] |  |  |  |  |  |
Gain (loss) by equity method (Other comprehensive income) | [7] |  |  |  |  |  |
Ending balance |  | 1,213 |  | 1,143 | [1] | 1,101 | [1]
Renova [Member] |  |  |  |  |  |  |
Disclosure of detailed information about investment property [line items] |  |  |  |  |  |  |
Beginning balance |  |  |  | 282 |  | 689 |
Gain (loss) by equity method (Income statement) |  |  |  | (282) |  | (390) |
Remeasurement of previously held equity interest in subsidiaries acquired (step- acquisition) |  |  |  |  |  |  |
Dividends |  |  |  |  |  |  |
Additions / acquisitions |  |  |  |  |  | 18 |
Other |  |  |  |  |  | (1) |
Disposals |  |  |  |  |  |  |
Reclassification to held for sale |  |  |  |  |  |  |
Gain (loss) by equity method (Other comprehensive income) |  |  |  |  |  | (34) |
Ending balance |  |  |  |  |  | 282 |
Usina Hidreletrica Itaocara S.A. [Member] |  |  |  |  |  |  |
Disclosure of detailed information about investment property [line items] |  |  |  |  |  |  |
Beginning balance |  |  | [1] | 4 | [1] | 3 |
Gain (loss) by equity method (Income statement) |  | (50) |  | (4) | [1] | (2) |
Remeasurement of previously held equity interest in subsidiaries acquired (step- acquisition) |  | 5 |  |  | [1] |  |
Dividends |  |  |  |  | [1] |  |
Additions / acquisitions |  | 23 |  | 5 | [1] | 3 |
Other |  | 22 |  |  | [1] |  |
Disposals |  |  |  |  | [1] |  |
Reclassification to held for sale | [1] |  |  | (5) |  |  |
Gain (loss) by equity method (Other comprehensive income) |  |  |  |  |  |  |
Ending balance |  |  |  |  | [1] | 4 | [1]
Alianca Geracao [Member] |  |  |  |  |  |  |
Disclosure of detailed information about investment property [line items] |  |  |  |  |  |  |
Beginning balance |  | 1,217 |  | 1,242 |  | 1,319 |
Gain (loss) by equity method (Income statement) |  | 78 |  | 65 |  | 72 |
Remeasurement of previously held equity interest in subsidiaries acquired (step- acquisition) |  |  |  |  |  |  |
Dividends |  | (103) |  | (90) |  | (149) |
Additions / acquisitions |  |  |  |  |  |  |
Other |  |  |  |  |  |  |
Disposals |  |  |  |  |  |  |
Reclassification to held for sale |  |  |  |  |  |  |
Gain (loss) by equity method (Other comprehensive income) |  |  |  |  |  |  |
Ending balance |  | 1,192 |  | 1,217 |  | 1,242 |
Alianca Norte (Belo Monte plant) [Member] |  |  |  |  |  |  |
Disclosure of detailed information about investment property [line items] |  |  |  |  |  |  |
Beginning balance |  | 664 |  | 577 |  | 527 |
Gain (loss) by equity method (Income statement) |  | 6 |  | 44 |  | (2) |
Remeasurement of previously held equity interest in subsidiaries acquired (step- acquisition) |  |  |  |  |  |  |
Dividends |  |  |  |  |  |  |
Additions / acquisitions |  | 1 |  | 43 |  | 51 |
Other |  |  |  |  |  | 1 |
Disposals |  |  |  |  |  |  |
Reclassification to held for sale |  |  |  |  |  |  |
Gain (loss) by equity method (Other comprehensive income) |  |  |  |  |  |  |
Ending balance |  | 671 |  | 664 |  | 577 |
Retiro Baixo [Member] |  |  |  |  |  |  |
Disclosure of detailed information about investment property [line items] |  |  |  |  |  |  |
Beginning balance |  | 171 |  | 158 |  | 162 |
Gain (loss) by equity method (Income statement) |  | 12 |  | 10 |  | 10 |
Remeasurement of previously held equity interest in subsidiaries acquired (step- acquisition) |  |  |  |  |  |  |
Dividends |  | (3) |  | (3) |  | (14) |
Additions / acquisitions |  |  |  | 6 |  |  |
Other |  |  |  |  |  |  |
Disposals |  |  |  |  |  |  |
Reclassification to held for sale |  |  |  |  |  |  |
Gain (loss) by equity method (Other comprehensive income) |  |  |  |  |  |  |
Ending balance |  | 180 |  | 171 |  | 158 |
Total of Investments [Member] |  |  |  |  |  |  |
Disclosure of detailed information about investment property [line items] |  |  |  |  |  |  |
Beginning balance |  | 5,235 |  | 7,792 |  | 8,753 |
Gain (loss) by equity method (Income statement) |  | 125 |  |  |  | (252) |
Remeasurement of previously held equity interest in subsidiaries acquired (step- acquisition) |  | 268 |  |  |  |  |
Dividends |  | (284) |  |  |  | (420) |
Additions / acquisitions |  | 33 |  |  |  | 292 |
Other |  | 23 |  |  |  | 29 |
Disposals |  |  |  |  |  | (569) |
Gain (loss) by equity method (Other comprehensive income) |  |  |  |  |  | (41) |
Ending balance |  | 5,400 |  | 5,235 |  | 7,792 |
Guanhaes Energia - Equity Deficit [Member] |  |  |  |  |  |  |
Disclosure of detailed information about investment property [line items] |  |  |  |  |  |  |
Beginning balance | [3] |  |  |  |  | (59) |
Gain (loss) by equity method (Income statement) | [3] |  |  |  |  |  |
Dividends | [3] |  |  |  |  |  |
Additions / acquisitions | [3] |  |  |  |  |  |
Other | [3] |  |  |  |  | 59 |
Disposals | [3] |  |  |  |  |  |
Gain (loss) by equity method (Other comprehensive income) | [3] |  |  |  |  |  |
Ending balance | [3] |  |  |  |  |  |
UFV Janauba Geracao De Energia Eletrica Distribuida [Member] |  |  |  |  |  |  |
Disclosure of detailed information about investment property [line items] |  |  |  |  |  |  |
Beginning balance |  | 9 |  |  |  |  |
Gain (loss) by equity method (Income statement) |  | 1 |  |  |  |  |
Remeasurement of previously held equity interest in subsidiaries acquired (step- acquisition) |  |  |  |  |  |  |
Dividends |  |  |  |  |  |  |
Additions / acquisitions |  |  |  | 9 |  |  |
Other |  |  |  |  |  |  |
Disposals |  |  |  |  |  |  |
Reclassification to held for sale |  |  |  |  |  |  |
Ending balance |  | 10 |  | 9 |  |  |
FIP Melbourne (Santo Antonio plant) [Member] |  |  |  |  |  |  |
Disclosure of detailed information about investment property [line items] |  |  |  |  |  |  |
Gain (loss) by equity method (Income statement) |  | (85) |  |  |  |  |
Remeasurement of previously held equity interest in subsidiaries acquired (step- acquisition) |  |  |  |  |  |  |
Dividends |  |  |  |  |  |  |
Additions / acquisitions |  |  |  |  |  |  |
Other |  |  |  |  |  |  |
Itaocara - Equity Deficit [Member] |  |  |  |  |  |  |
Disclosure of detailed information about investment property [line items] |  |  |  |  |  |  |
Beginning balance |  |  |  |  |  |  |
Gain (loss) by equity method (Income statement) |  |  |  |  |  |  |
Remeasurement of previously held equity interest in subsidiaries acquired (step- acquisition) |  |  |  |  |  |  |
Dividends |  |  |  |  |  |  |
Additions / acquisitions |  |  |  |  |  |  |
Other |  | (22) |  |  |  |  |
Ending balance |  | R$ (22) |  |  |  |  |
[1] | Others arises from first adoption of the new accounting standards on January 1, 2018, recognized by the investees directly in equity without inclusion in the Income statement. The column Reclassification to held for sale includes the effect of the reclassification of the investment in Light, Axxion, Lightger, Guanhaes and Itaocara to Non-current assets held for sale, in accordance with IFRS 5.
[2] | On November 30, 2017 the Company acquired all Lepsa's shares, and therefore as from that date on it consolidates that company in its financial statements. Lepsa's sole asset is its holdings in the share capital of Light. Hence, the Company no longer presents the investment that it previously held at Lepsa in its consolidated statement, presenting only the interest in Light.
[3] | Equity deficit reversed through injection of capital.
[4] | Due to the result of analysis of impairment indication, due to the recurring losses incurred by Madeira, a provision was recognized for loss of part of the residual added value of the investment in Madeira, to limit its balance to the minimum value of the excess of future economic benefits arising from use of the net fixed asset on December, 31, 2018, using the nominal WACC of 9.59% as the discount rate. The provision is presented in the statement of income for the year ended December 31, 2018 as Impairment loss on Investments.
[5] | In October 2018 the Company subscribed capital increases in Mesa and FIP Melbourne, of R$25 and R$26, respectively. These funds were entirely applied in capital contributions to Santo Antonio Energia S.A. ('Saesa' or 'Santo Antonio Hydroelectric Plant').
[6] | Arising from the business combination between the Company and Energimp. The rights to exploitation of the regulated activity are classified in the consolidated statement of financial position under Intangible.
[7] | On November 2017 the Company sold part of its equity interest in the jointly-controlled entity Taesa. The Company sold 34 million Units of Taesa at the price of R$ 21.10 per Unit. With the sale, the Company's holding in the share capital of Taesa was reduced from 31.54% to 21.68%. The shares that were sold are not part of the controlling shareholding block of Taesa, and as a result Cemig continues to be in the controlling block of Taesa.

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