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17. PROPERTY, PLANT AND EQUIPMENT (Tables) | 12 Months Ended
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Dec. 31, 2020
Disclosure of detailed information about property, plant and equipment [abstract] |
Schedule of movement in property, plant and equipment |
|  | 2020 |  | 2019
|  | Historical cost |  | Accumulated depreciation |  | Net value |  | Historical cost |  | Accumulated depreciation |  | Net value
In service |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Land |  |  | 247 |  |  |  | (23 | ) |  |  | 224 |  |  |  | 248 |  |  |  | (19 | ) |  |  | 229 |
Reservoirs, dams and watercourses |  |  | 3,300 |  |  |  | (2,280 | ) |  |  | 1,020 |  |  |  | 3,280 |  |  |  | (2,200 | ) |  |  | 1,080 |
Buildings, works and improvements |  |  | 1,100 |  |  |  | (836 | ) |  |  | 264 |  |  |  | 1,092 |  |  |  | (818 | ) |  |  | 274 |
Machinery and equipment |  |  | 2,647 |  |  |  | (1,930 | ) |  |  | 717 |  |  |  | 2,598 |  |  |  | (1,869 | ) |  |  | 729 |
Vehicles |  |  | 21 |  |  |  | (19 | ) |  |  | 2 |  |  |  | 20 |  |  |  | (18 | ) |  |  | 2 |
Furniture and utensils |  |  | 14 |  |  |  | (11 | ) |  |  | 3 |  |  |  | 14 |  |  |  | (11 | ) |  |  | 3 |
|  |  | 7,329 |  |  |  | (5,099 | ) |  |  | 2,230 |  |  |  | 7,252 |  |  |  | (4,935 | ) |  |  | 2,317 |
In progress |  |  | 177 |  |  |  | — |  |  |  | 177 |  |  |  | 133 |  |  |  | — |  |  |  | 133 |
Net property, plant and equipment |  |  | 7,506 |  |  |  | (5,099 | ) |  |  | 2,407 |  |  |  | 7,385 |  |  |  | (4,935 | ) |  |  | 2,450 |
Changes in PP&E are as follows:
|  | 2019 |  | Additions |  | Disposals (3) |  | Depreciation |  | Transfers / capitalizations (2) |  | 2020
In service |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Land (1) |  |  | 229 |  |  |  | — |  |  |  | (1 | ) |  |  | (4 | ) |  |  | — |  |  |  | 224 |
Reservoirs, dams and watercourses |  |  | 1,080 |  |  |  | — |  |  |  | — |  |  |  | (80 | ) |  |  | 20 |  |  |  | 1,020 |
Buildings, works and improvements |  |  | 274 |  |  |  | — |  |  |  | — |  |  |  | (18 | ) |  |  | 8 |  |  |  | 264 |
Machinery and equipment |  |  | 729 |  |  |  | 20 |  |  |  | (2 | ) |  |  | (79 | ) |  |  | 49 |  |  |  | 717 |
Vehicles |  |  | 2 |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | 2 |
Furniture and utensils |  |  | 3 |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | 3 |
|  |  | 2,317 |  |  |  | 20 |  |  |  | (3 | ) |  |  | (181 | ) |  |  | 77 |  |  |  | 2,230 |
In progress |  |  | 133 |  |  |  | 112 |  |  |  | 11 |  |  |  | — |  |  |  | (79 | ) |  |  | 177 |
Net property, plant and equipment |  |  | 2,450 |  |  |  | 132 |  |  |  | 8 |  |  |  | (181 | ) |  |  | (2 | ) |  |  | 2,407 |
| (1) | Certain land sites linked to concession contracts and without provision for reimbursement are amortized in accordance with the period of the concession.
| (2) | Balances of R$2 were transferred to Intangible assets from PP&E.
| (3) | Includes the impairment loss recognized for assets in progress.
|  | 2018 |  | Additions |  | Disposals |  | Depreciation |  | Transfers / capitalizations (2) |  | 2019
In service |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Land (1) |  |  | 215 |  |  |  | — |  |  |  | — |  |  |  | (3 | ) |  |  | 17 |  |  |  | 229 |
Reservoirs, dams and watercourses |  |  | 1,150 |  |  |  | — |  |  |  | (4 | ) |  |  | (80 | ) |  |  | 14 |  |  |  | 1,080 |
Buildings, works and improvements |  |  | 314 |  |  |  | — |  |  |  | (5 | ) |  |  | (19 | ) |  |  | (16 | ) |  |  | 274 |
Machinery and equipment |  |  | 854 |  |  |  | — |  |  |  | (81 | ) |  |  | (78 | ) |  |  | 34 |  |  |  | 729 |
Vehicles |  |  | 5 |  |  |  | — |  |  |  | — |  |  |  | (3 | ) |  |  | — |  |  |  | 2 |
Furniture and utensils |  |  | 4 |  |  |  | — |  |  |  | (1 | ) |  |  | — |  |  |  | — |  |  |  | 3 |
|  |  | 2,542 |  |  |  |  |  |  |  | (91 | ) |  |  | (183 | ) |  |  | 49 |  |  |  | 2,317 |
In progress |  |  | 120 |  |  |  | 70 |  |  |  | (12 | ) |  |  | — |  |  |  | (45 | ) |  |  | 133 |
Net property, plant and equipment |  |  | 2,662 |  |  |  | 70 |  |  |  | (103 | ) |  |  | (183 | ) |  |  | 4 |  |  |  | 2,450 |
| (1) | Certain land sites linked to concession contracts and without provision for reimbursement are amortized in accordance with the period of the concession.
| (2) | Balances of R$4 were transferred between Intangible assets, concession contract assets and PP&E.
|  | 2017 |  | Additions |  | Disposals |  | Depreciation |  | Transfer to Held for sale |  | Adjustment for business combination |  | Transfers / capitalizations |  | 2018
In service |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Land (1) |  |  | 211 |  |  |  | — |  |  |  | — |  |  |  | (2 | ) |  |  | — |  |  |  | — |  |  |  | 6 |  |  |  | 215 |
Reservoirs, dams and watercourses |  |  | 1,234 |  |  |  | — |  |  |  | (2 | ) |  |  | (82 | ) |  |  | — |  |  |  | — |  |  |  | — |  |  |  | 1,150 |
Buildings, works and improvements |  |  | 331 |  |  |  | — |  |  |  | — |  |  |  | (19 | ) |  |  | — |  |  |  | — |  |  |  | 2 |  |  |  | 314 |
Machinery and equipment |  |  | 874 |  |  |  | — |  |  |  | (9 | ) |  |  | (70 | ) |  |  | (256 | ) |  |  | 296 |  |  |  | 19 |  |  |  | 854 |
Vehicles |  |  | 3 |  |  |  | — |  |  |  |  |  |  |  | (2 | ) |  |  | — |  |  |  | — |  |  |  | 4 |  |  |  | 5 |
Furniture and utensils |  |  | 3 |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | 1 |  |  |  | 4 |
|  |  | 2,656 |  |  |  | — |  |  |  | (11 | ) |  |  | (175 | ) |  |  | (256 | ) |  |  | 296 |  |  |  | 32 |  |  |  | 2,542 |
In progress |  |  | 106 |  |  |  | 77 |  |  |  | (22 | ) |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (41 | ) |  |  | 120 |
Net property, plant and equipment |  |  | 2,762 |  |  |  | 77 |  |  |  | (33 | ) |  |  | (175 | ) |  |  | (256 | ) |  |  | 296 |  |  |  | (9 | ) |  |  | 2,662 |
| (1) | Certain land sites linked to concession contracts and without provision for reimbursement are amortized in accordance with the period of the concession.
Schedule of summary of property plant and equipment depreciation rate | Depreciation rates, which take into consideration the expected useful life of the assets, are revised annually by Management and are as follows:
Generation |  | (%) |  | Administration |  | (%)
Reservoirs, dams and watercourses |  |  | 2 |  |  | Software |  |  | 20 |
Buildings – Machine room |  |  | 2 |  |  | Vehicles |  |  | 14.29 |
Buildings – Other |  |  | 3.33 |  |  | IT equipment in general |  |  | 16.67 |
Generator |  |  | 3.33 |  |  | General equipment |  |  | 6.25 |
Water turbine |  |  | 2.5 |  |  | Buildings – Other |  |  | 3.33 |
Pressure tunnel |  |  | 3.13 |  |  |  |  |  |  |
Command station, panel and cubicle |  |  | 3.57 |  |  |  |  |  |  |
Floodgate |  |  | 3.33 |  |  |  |  |  |  |
The average annual depreciation rate for the year 2020 is 3.14% (3.13% in 2019 and 3.72% in 2018). The segregation by activity is as follows:
Hydroelectric Generation |  | Wind Power Generation |  | Administration
| 2.96 | % |  |  | 4.94 | % |  |  | 6,19 | %
Schedule of consortium | The Company’s portion in the consortium is recorded and controlled individually in the respective categories of PP&E and Intangible assets.
|  | Stake in power output (%) |  | Average annual depreciation rate (%) |  | 2020 |  | 2019
In service |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Usina de Queimado |  |  | 82.50 |  |  |  | 3.93 |  |  |  | 218 |  |  |  | 217 |
Accumulated depreciation |  |  |  |  |  |  |  |  |  |  | (117 | ) |  |  | (109 | )
Total |  |  |  |  |  |  |  |  |  |  | 101 |  |  |  | 108 |
In progress |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Usina de Queimado |  |  | 82.50 |  |  |  | — |  |  |  | 2 |  |  |  | 1 |
Total |  |  |  |  |  |  |  |  |  |  | 2 |  |  |  | 1 |

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