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16. CONCESSION FINANCIAL AND SECTOR ASSETS AND LIABILITIES (Details 1) - BRL (R$) R$ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Disclosure of financial assets [line items] |  |  |
Additions | R$ 1,167 | R$ 893 |
Amounts received | (250) | (250) | R$ (234)
Monetary updating | 317 | 322 | 317
Infrastructure [Member] |  |  |
Disclosure of financial assets [line items] |  |  |
Beginning Balance | 4,917 | 7,084 | 5,303
Effects of first - time adoption of IFRS |  | (1,092) |
Additions |  |  | 25
Transfers of indemnity - plants not renewed |  |  | 1,082
Amounts received | (440) | (1,638) | (496)
Transfers between PP&E, Financial assets and Intangible assets |  |  | 148
Transfers from PP&E |  | 27 |
Transfers from (to) intangible assets | 23 |  |
Transfers from contract assets | 92 |  |
Others transfers |  | (2) |
Monetary updating | 458 | 539 | 541
Adjustment of expectation of cash flow from the Concession financial assets |  |  | 63
Disposals | (1) | (1) | (2)
Adjustment of BRR of Transmission Assets |  |  | 149
Adjustment on indemnities of plants not renewed (Ministerial Order 291) - including financial updating |  |  | 271
Ending Balance | 5,049 | 4,917 | 7,084
Infrastructure [Member] | Transmission [Member] |  |  |
Disclosure of financial assets [line items] |  |  |
Beginning Balance | 1,296 | 2,475 | 2,287
Effects of first - time adoption of IFRS |  | (1,092) |
Additions |  |  | 25
Amounts received | (181) | (249) | (264)
Transfers between PP&E, Financial assets and Intangible assets |  |  | 2
Transfers from PP&E |  |  |
Transfers from contract assets | 44 |  |
Others transfers |  |  |
Monetary updating | 122 | 162 | 224
Adjustment of expectation of cash flow from the Concession financial assets |  |  | 54
Disposals |  |  | (2)
Adjustment of BRR of Transmission Assets |  |  | 149
Ending Balance | 1,281 | 1,296 | 2,475
Infrastructure [Member] | Generation [Member] |  |  |
Disclosure of financial assets [line items] |  |  |
Beginning Balance | 3,225 | 4,238 | 2,800
Transfers of indemnity - plants not renewed |  |  | 1,082
Amounts received | (259) | (1,389) | (232)
Transfers from PP&E |  |  |
Transfers from contract assets |  |  |
Others transfers |  | (1) |
Monetary updating | 318 |  | 317
Disposals |  |  |
Adjustment on indemnities of plants not renewed (Ministerial Order 291) - including financial updating |  |  | 271
Ending Balance | 3,284 | 3,225 | 4,238
Infrastructure [Member] | Distribution [Member] |  |  |
Disclosure of financial assets [line items] |  |  |
Beginning Balance | 396 | 371 | 216
Transfers between PP&E, Financial assets and Intangible assets |  |  | 146
Transfers from PP&E |  | 27 |
Transfers from (to) intangible assets | (1) |  |
Transfers from contract assets | 48 |  |
Others transfers |  | (1) |
Monetary updating | 18 |  |
Adjustment of expectation of cash flow from the Concession financial assets |  |  | 9
Disposals | (1) | (1) |
Ending Balance | 460 | 396 | R$ 371
Infrastructure [Member] | Gas [Member] |  |  |
Disclosure of financial assets [line items] |  |  |
Beginning Balance |  |  |
Transfers from PP&E |  |  |
Transfers from (to) intangible assets | 24 |  |
Transfers from contract assets |  |  |
Others transfers |  |  |
Disposals |  |  |
Ending Balance | R$ 24 |  |

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