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Property, Plant and Equipment (Tables) | 12 Months Ended
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Dec. 31, 2017
Text block1 [abstract] |
Schedule of Property, Plant and Equipment |
|  | 2017 |  |  | 2016 |
| Historical cost |  |  | Accumulated depreciation |  |  | Net value |  |  | Historical cost |  |  | Accumulated depreciation |  |  | Net value |
In service |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Land |  |  | 225 |  |  |  | (14 | ) |  |  | 211 |  |  |  | 287 |  |  |  | (8 | ) |  |  | 279 |
Reservoirs, dams and watercourses |  |  | 3,285 |  |  |  | (2,051 | ) |  |  | 1,234 |  |  |  | 5,347 |  |  |  | (3,586 | ) |  |  | 1,761 |
Buildings, works and improvements |  |  | 1,117 |  |  |  | (786 | ) |  |  | 331 |  |  |  | 1,789 |  |  |  | (1,371 | ) |  |  | 418 |
Machinery and equipment |  |  | 2,936 |  |  |  | (2,062 | ) |  |  | 874 |  |  |  | 4,519 |  |  |  | (3,347 | ) |  |  | 1,172 |
Vehicles |  |  | 29 |  |  |  | (26 | ) |  |  | 3 |  |  |  | 29 |  |  |  | (25 | ) |  |  | 4 |
Furniture and utensils |  |  | 16 |  |  |  | (13 | ) |  |  | 3 |  |  |  | 15 |  |  |  | (12 | ) |  |  | 3 |
|  |  | 7,608 |  |  |  | (4,952 | ) |  |  | 2,656 |  |  |  | 11,986 |  |  |  | (8,349 | ) |  |  | 3,637 |
In progress |  |  | 106 |  |  |  | — |  |  |  | 106 |  |  |  | 138 |  |  |  | — |  |  |  | 138 |
Net property, plant and equipment |  |  | 7,714 |  |  |  | (4,952 | ) |  |  | 2,762 |  |  |  | 12,124 |  |  |  | (8,349 | ) |  |  | 3,775 |
Movement in Property, Plant and Equipment | This table shows the changes in PP&E:
|  | 2016 |  |  | Addition |  |  | Jaguara, Miranda and Volta Grande Plants (1) |  |  | Disposals |  |  | Depreciation |  |  | Transfers / capitalizations |  |  | 2017 |
In service |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Land |  |  | 279 |  |  |  | — |  |  |  | (61 | ) |  |  | (1 | ) |  |  | (6 | ) |  |  | — |  |  |  | 211 |
Reservoirs, dams and watercourses |  |  | 1,761 |  |  |  | — |  |  |  | (441 | ) |  |  | (4 | ) |  |  | (85 | ) |  |  | 3 |  |  |  | 1,234 |
Buildings, works and improvements |  |  | 418 |  |  |  | — |  |  |  | (69 | ) |  |  | — |  |  |  | (20 | ) |  |  | 2 |  |  |  | 331 |
Machinery and equipment |  |  | 1,172 |  |  |  | — |  |  |  | (305 | ) |  |  | (5 | ) |  |  | (93 | ) |  |  | 105 |  |  |  | 874 |
Vehicles |  |  | 4 |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | (1 | ) |  |  | — |  |  |  | 3 |
Furniture and utensils |  |  | 3 |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | 3 |
|  |  | 3,637 |  |  |  | — |  |  |  | (876 | ) |  |  | (10 | ) |  |  | (205 | ) |  |  | 110 |  |  |  | 2,656 |
In progress |  |  | 138 |  |  |  | 83 |  |  |  |  |  |  |  | (17 | ) |  |  | — |  |  |  | (98 | ) |  |  | 106 |
Net property, plant and equipment |  |  | 3,775 |  |  |  | 83 |  |  |  | (876 | ) |  |  | (27 | ) |  |  | (205 | ) |  |  | 12 |  |  |  | 2,762 |
(1) | Transferred to Concession financial assets , in relation to the Jaguara, Miranda and Volta Grande Plants (more details in Note 15).
|  | 2015 |  |  | Addition |  |  | Disposals |  |  | Depreciation |  |  | Transfers / capitalizations |  |  | 2016 |
In service |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Land |  |  | 279 |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | 279 |
Reservoirs, dams and watercourses |  |  | 1,830 |  |  |  | — |  |  |  | — |  |  |  | (99 | ) |  |  | 30 |  |  |  | 1,761 |
Buildings, works and improvements |  |  | 437 |  |  |  | — |  |  |  | (1 | ) |  |  | (23 | ) |  |  | 5 |  |  |  | 418 |
Machinery and equipment |  |  | 1,192 |  |  |  | — |  |  |  | (42 | ) |  |  | (110 | ) |  |  | 132 |  |  |  | 1,172 |
Vehicles |  |  | 8 |  |  |  | — |  |  |  | — |  |  |  | (2 | ) |  |  | (2 | ) |  |  | 4 |
Furniture and utensils |  |  | 4 |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | (1 | ) |  |  | 3 |
|  |  | 3,750 |  |  |  | — |  |  |  | (43 | ) |  |  | (234 | ) |  |  | 164 |  |  |  | 3,637 |
In progress |  |  | 190 |  |  |  | 120 |  |  |  | (13 | ) |  |  | — |  |  |  | (159 | ) |  |  | 138 |
Net property, plant and equipment |  |  | 3,940 |  |  |  | 120 |  |  |  | (56 | ) |  |  | (234 | ) |  |  | 5 |  |  |  | 3,775 |
|  | 2014 |  |  | Additions |  |  | Disposals |  |  | Transfer of assets to Aliança Geração de Energia |  |  | Indemnity receivable |  |  | Depreciation |  |  | Transfers to Other long term assets |  |  | Transfers / capitalizations |  |  | 2015 |
In service |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Land |  |  | 372 |  |  |  | — |  |  |  | (12 | ) |  |  | (41 | ) |  |  | (16 | ) |  |  | (3 | ) |  |  | (17 | ) |  |  | (4 | ) |  |  | 279 |
Reservoirs, dams and water courses |  |  | 2,261 |  |  |  | — |  |  |  | — |  |  |  | (163 | ) |  |  | (46 | ) |  |  | (127 | ) |  |  | (102 | ) |  |  | 7 |  |  |  | 1,830 |
Buildings, works and improvements |  |  | 609 |  |  |  | — |  |  |  | (1 | ) |  |  | (116 | ) |  |  | (17 | ) |  |  | (32 | ) |  |  | (13 | ) |  |  | 7 |  |  |  | 437 |
Machinery and equipment |  |  | 2,053 |  |  |  | — |  |  |  | (3 | ) |  |  | (308 | ) |  |  | (466 | ) |  |  | (149 | ) |  |  | (69 | ) |  |  | 134 |  |  |  | 1,192 |
Vehicles |  |  | 9 |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | (3 | ) |  |  | — |  |  |  | 2 |  |  |  | 8 |
Furniture and utensils |  |  | 5 |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | (1 | ) |  |  | 4 |
|  |  | 5,309 |  |  |  | — |  |  |  | (16 | ) |  |  | (628 | ) |  |  | (545 | ) |  |  | (314 | ) |  |  | (201 | ) |  |  | 145 |  |  |  | 3,750 |
In progress |  |  | 235 |  |  |  | 126 |  |  |  | (4 | ) |  |  | (3 | ) |  |  | (1 | ) |  |  | (1 | ) |  |  | (22 | ) |  |  | (140 | ) |  |  | 190 |
Net PP&E |  |  | 5,544 |  |  |  | 126 |  |  |  | (20 | ) |  |  | (631 | ) |  |  | (546 | ) |  |  | (315 | ) |  |  | (223 | ) |  |  | 5 |  |  |  | 3,940 |
Summary of Accumulated Investments in Consortium |
|  | Interest in power output, % |  |  | Average annual depreciation rate % |  |  | 2017 |  |  | 2016 |
In service |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Queimado plant |  |  | 82.50 |  |  |  | 4.0 |  |  |  | 217 |  |  |  | 217 |
Accumulated depreciation |  |  | — |  |  |  | — |  |  |  | (91 | ) |  |  | (90 | )
Total in operation |  |  |  |  |  |  |  |  |  |  | 126 |  |  |  | 127 |

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