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17. CONCESSION CONTRACT ASSETS (Tables) | 12 Months Ended
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Dec. 31, 2019
Disclosure of assets recognised from costs to obtain or fulfil contracts with customers [abstract] |
Schedule of detailed information about concession contract assets |
|  | 2019 |  |  |  | 2018 |
Distribution – Infrastructure assets under construction |  | 740 |  |  |  | 518 |
Gas – Infrastructure assets under construction |  | 68 |  |  |  | 82 |
Transmission – Assets reincorporated into the assets remuneration base |  | 348 |  |  |  | 492 |
Transmission – Assets remunerated by tariff |  | 849 |  |  |  | 637 |
|  | 2,005 |  |  |  | 1,729 |
Current |  | 172 |  |  |  | 131 |
Non-current |  | 1,833 |  |  |  | 1,598 |
Schedule of changes in concession contract assets | Changes in concession contract assets are as follows:
|  | Transmission |  |  |  | Distribution |  |  |  | Gas |  |  |  | Total |
Balances at December 31, 2017 |  | – |  |  |  | – |  |  |  | – |  |  |  | – |
Effects of adoption of IFRS 15 |  | 1,092 |  |  |  | 532 |  |  |  | 90 |  |  |  | 1,714 |
Additions |  | 96 |  |  |  | 727 |  |  |  | 70 |  |  |  | 893 |
Inflation adjustment |  | 88 |  |  |  | – |  |  |  | – |  |  |  | 88 |
Adjustment to expected contract cash flow from the concession |  | 13 |  |  |  | – |  |  |  | – |  |  |  | 13 |
Amounts received |  | (161 | ) |  |  | – |  |  |  | – |  |  |  | (161 | )
Transfers to financial assets |  | – |  |  |  | (27 | ) |  |  | – |  |  |  | (27 | )
Transfers to intangible assets |  | – |  |  |  | (672 | ) |  |  | (78 | ) |  |  | (750 | )
Transfers from PP&E |  | 1 |  |  |  |  |  |  |  | – |  |  |  | 1 |
Impairment |  |  |  |  |  | (42 | ) |  |  |  |  |  |  | (42 | )
Balances at December 31, 2018 |  | 1,129 |  |  |  | 518 |  |  |  | 82 |  |  |  | 1,729 |
Additions |  | 221 |  |  |  | 903 |  |  |  | 43 |  |  |  | 1,167 |
Inflation adjustment |  | 34 |  |  |  | – |  |  |  | – |  |  |  | 34 |
Adjustment to expected contract cash flow from the concession |  | 15 |  |  |  | – |  |  |  | – |  |  |  | 15 |
Amounts received |  | (154 | ) |  |  | – |  |  |  | – |  |  |  | (154 | )
Disposals |  | (4 | ) |  |  | – |  |  |  | (2 | ) |  |  | (6 | )
Transfers to financial assets |  | (44 | ) |  |  | (48 | ) |  |  | – |  |  |  | (92 | )
Transfers to intangible assets |  | – |  |  |  | (630 | ) |  |  | (55 | ) |  |  | (685 | )
Impairment |  | – |  |  |  | (3 | ) |  |  | – |  |  |  | (3 | )
Balances at December 31, 2019 |  | 1,197 |  |  |  | 740 |  |  |  | 68 |  |  |  | 2,005 |

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