XML 65 R58.htm IDEA: XBRL DOCUMENT
v3.8.0.1

Intangible Assets (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2017
Text block1 [abstract] |
Summary of Composition of Intangible Assets |
a) | Composition of the balance at December 31, 2017 and 2016
|  | 2017 |  |  | 2016 |
| Historical cost |  |  | Accumulated amortization |  |  | Residual value |  |  | Historical cost |  |  | Accumulated amortization |  |  | Residual value |
In service |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Useful life defined |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Temporary easements |  |  | 12 |  |  |  | (2 | ) |  |  | 10 |  |  |  | 12 |  |  |  | (2 | ) |  |  | 10 |
Paid concession |  |  | 19 |  |  |  | (11 | ) |  |  | 8 |  |  |  | 19 |  |  |  | (10 | ) |  |  | 9 |
Assets of concession |  |  | 17,837 |  |  |  | (7,402 | ) |  |  | 10,435 |  |  |  | 16,288 |  |  |  | (7,040 | ) |  |  | 9,248 |
Others |  |  | 82 |  |  |  | (65 | ) |  |  | 17 |  |  |  | 77 |  |  |  | (59 | ) |  |  | 18 |
|  |  | 17,950 |  |  |  | (7,480 | ) |  |  | 10,470 |  |  |  | 16,396 |  |  |  | (7,111 | ) |  |  | 9,285 |
In progress |  |  | 686 |  |  |  | — |  |  |  | 686 |  |  |  | 1,535 |  |  |  | — |  |  |  | 1,535 |
Net intangible assets |  |  | 18,636 |  |  |  | (7,480 | ) |  |  | 11,156 |  |  |  | 17,931 |  |  |  | (7,111 | ) |  |  | 10,820 |
Summary of Changes in Intangible Assets |
b) | Changes in Intangible assets
|  | 2016 |  |  | Addition |  |  | Disposals |  |  | Amortization |  |  | Transfer (1) |  |  | 2017 |
In service |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Useful life defined |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Temporary easements |  |  | 10 |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | 10 |
Paid concession |  |  | 9 |  |  |  | — |  |  |  | — |  |  |  | (1 | ) |  |  | — |  |  |  | 8 |
Assets of concession |  |  | 9,248 |  |  |  | — |  |  |  | (11 | ) |  |  | (638 | ) |  |  | 1,836 |  |  |  | 10,435 |
Others |  |  | 18 |  |  |  | — |  |  |  | — |  |  |  | (7 | ) |  |  | 6 |  |  |  | 17 |
|  |  | 9,285 |  |  |  | — |  |  |  | (11 | ) |  |  | (646 | ) |  |  | 1,842 |  |  |  | 10,470 |
In progress |  |  | 1,535 |  |  |  | 1,105 |  |  |  | (8 | ) |  |  | — |  |  |  | (1,946 | ) |  |  | 686 |
Net intangible assets |  |  | 10,820 |  |  |  | 1,105 |  |  |  | (19 | ) |  |  | (646 | ) |  |  | (104 | ) |  |  | 11,156 |
(1) | The residual balance of the transfers refers to the balances transferred to Financial assets.
|  | 2015 |  |  | Addition |  |  | Special obligations – write-down (1) |  |  | Disposals |  |  | Amortization |  |  | Transfer (2) |  |  | 2016 |
In service |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Useful life defined |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Temporary easements |  |  | 10 |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | 10 |
Paid concession |  |  | 9 |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  |  |  |  |  | — |  |  |  | 9 |
Assets of concession |  |  | 8,967 |  |  |  | 6 |  |  |  | 98 |  |  |  | (32 | ) |  |  | (595 | ) |  |  | 804 |  |  |  | 9,248 |
Others |  |  | 14 |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | (4 | ) |  |  | 8 |  |  |  | 18 |
|  |  | 9,000 |  |  |  | 6 |  |  |  | 98 |  |  |  | (32 | ) |  |  | (599 | ) |  |  | 812 |  |  |  | 9,285 |
In progress |  |  | 1,275 |  |  |  | 1,157 |  |  |  | — |  |  |  | (8 | ) |  |  | — |  |  |  | (889 | ) |  |  | 1,535 |
Net intangible assets |  |  | 10,275 |  |  |  | 1,163 |  |  |  | 98 |  |  |  | (40 | ) |  |  | (599 | ) |  |  | (77 | ) |  |  | 10,820 |
(1) | The write-down of a Special Obligation arises from signature of a Debt Recognition Contract by Eletrobras, in the amount of R$ 98, for restitution of amounts calculated in the final settlement of Financing and Subsidy Contracts for the Luz Para Todos (‘Light for All’) program, with funds from the CDE account, and return of funds related to the Global Reversion Reserve (RGR).
(2) | The residual balance of the transfers refers to the balances transferred to Financial assets.
|  | 2014 |  |  | Additions |  |  | Transfer of assets to Aliança Geração de Energia |  |  | Disposals |  |  | Amortization |  |  | Transfer from Financial to Intangible on renewal of concessions(*) |  |  | Transfers |  |  | 2015 |
In service |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Useful life defined |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Temporary easements |  |  | 12 |  |  |  | — |  |  |  | (2 | ) |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | 10 |
Paid concession |  |  | 24 |  |  |  | — |  |  |  | (13 | ) |  |  | — |  |  |  | (2 | ) |  |  | — |  |  |  | — |  |  |  | 9 |
Assets of concession |  |  | 2,223 |  |  |  | 8 |  |  |  | — |  |  |  | (21 | ) |  |  | (512 | ) |  |  | 7,162 |  |  |  | 107 |  |  |  | 8,967 |
Other |  |  | 17 |  |  |  | — |  |  |  | 1 |  |  |  | — |  |  |  | (5 | ) |  |  | — |  |  |  | 1 |  |  |  | 14 |
|  |  | 2,276 |  |  |  | 8 |  |  |  | (14 | ) |  |  | (21 | ) |  |  | (519 | ) |  |  | 7,162 |  |  |  | 108 |  |  |  | 9,000 |
In progress |  |  | 1,103 |  |  |  | 1,108 |  |  |  | — |  |  |  | (17 | ) |  |  | — |  |  |  | — |  |  |  | (919 | ) |  |  | 1,275 |
Net intangible assets |  |  | 3,379 |  |  |  | 1,116 |  |  |  | (14 | ) |  |  | (38 | ) |  |  | (519 | ) |  |  | 7,162 |  |  |  | (811 | ) |  |  | 10,275 |
(*) | See comments in Note 15.

X
- Definition The disclosure of detailed information about intangible assets. [Refer: Intangible assets other than goodwill] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 38 -IssueDate 2017-01-01 -Paragraph 118 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=38&date=2017-03-01&anchor=para_118&doctype=Standard -URIDate 2017-03-09 + Details
Name: | ifrs-full_DisclosureOfDetailedInformationAboutIntangibleAssetsExplanatory
Namespace Prefix: | ifrs-full_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition The disclosure of the reconciliation of changes in intangible assets and goodwill. [Refer: Intangible assets and goodwill] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 38 -IssueDate 2017-01-01 -Paragraph 118 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=38&date=2017-03-01&anchor=para_118&doctype=Standard -URIDate 2017-03-09 + Details
Name: | ifrs-full_DisclosureOfReconciliationOfChangesInIntangibleAssetsAndGoodwillExplanatory
Namespace Prefix: | ifrs-full_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Text block1 [abstract] + References No definition available. + Details
Name: | xcmig_TextBlock1Abstract
Namespace Prefix: | xcmig_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration