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Intangible Assets (Tables) | 12 Months Ended
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Dec. 31, 2018
Text block [abstract] |
Summary of Changes in Intangible Assets | The evolution of the Group’s intangible assets for the years ended December 31, 2018, 2017 and 2016 is as follows:
|  | Service concession |  |  | Exploration rights |  |  | Other intangibles |  |  | Total |
Cost |  |  | 9,527 |  |  |  | 2,990 |  |  |  | 4,260 |  |  |  | 16,777 |
Accumulated amortization |  |  | 5,553 |  |  |  | 155 |  |  |  | 3,710 |  |  |  | 9,418 |
Balance as of December 31, 2015 |  |  | 3,974 |  |  |  | 2,835 |  |  |  | 550 |  |  |  | 7,359 |
Cost |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Increases |  |  | 642 |  |  |  | 75 |  |  |  | 171 |  |  |  | 888 |
Translation effect |  |  | 2,127 |  |  |  | 612 |  |  |  | 936 |  |  |  | 3,675 |
Decreases and reclassifications |  |  | (547 | ) |  |  | (584 | ) |  |  | 127 |  |  |  | (1,004 | )
Accumulated amortization |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Increases |  |  | 437 |  |  |  | — |  |  |  | 280 |  |  |  | 717 |
Translation effect |  |  | 1,245 |  |  |  | — |  |  |  | 848 |  |  |  | 2,093 |
Decreases and reclassifications |  |  | — |  |  |  | (6 | ) |  |  | — |  |  |  | (6 | )
Cost |  |  | 11,749 |  |  |  | 3,093 |  |  |  | 5,494 |  |  |  | 20,336 |
Accumulated amortization |  |  | 7,235 |  |  |  | 149 |  |  |  | 4,838 |  |  |  | 12,222 |
Balance as of December 31, 2016 |  |  | 4,514 |  |  |  | 2,944 |  |  |  | 656 |  |  |  | 8,114 |
Cost |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Increases |  |  | 947 |  |  |  | 8 |  |  |  | 198 |  |  |  | 1,153 |
Translation effect |  |  | 2,141 |  |  |  | 513 |  |  |  | 953 |  |  |  | 3,607 |
Decreases and reclassifications |  |  | (13 | ) |  |  | (149 | ) |  |  | 185 |  |  |  | 23 |
Accumulated amortization |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Increases |  |  | 615 |  |  |  | — |  |  |  | 223 |  |  |  | 838 |
Translation effect |  |  | 1,330 |  |  |  | — |  |  |  | 885 |  |  |  | 2,215 |
Decreases and reclassifications |  |  | — |  |  |  | (149 | ) |  |  | 17 |  |  |  | (132 | )
Cost |  |  | 14,824 |  |  |  | 3,465 |  |  |  | 6,830 |  |  |  | 25,119 |
Accumulated amortization |  |  | 9,180 |  |  |  | — |  |  |  | 5,963 |  |  |  | 15,143 |
Balance as of December 31, 2017 |  |  | 5,644 |  |  |  | 3,465 |  |  |  | 867 |  |  |  | 9,976 |
Cost |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Increases |  |  | 1,303 |  |  |  | 276 |  |  |  | 765 |  |  |  | 2,344 |
Translation effect |  |  | 15,544 |  |  |  | 3,414 |  |  |  | 6,636 |  |  |  | 25,594 |
Adjustment for inflation(1) |  |  | — |  |  |  | — |  |  |  | 591 |  |  |  | 591 |
Decreases and reclassifications |  |  | 31 |  |  |  | (248 | ) |  |  | (100 | ) |  |  | (317 | )
Accumulated amortization |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Increases |  |  | 1,190 |  |  |  | — |  |  |  | 559 |  |  |  | 1,749 |
Translation effect |  |  | 9,740 |  |  |  | — |  |  |  | 6,243 |  |  |  | 15,983 |
Adjustment for inflation(1) |  |  | — |  |  |  | — |  |  |  | 58 |  |  |  | 58 |
Decreases and reclassifications |  |  | — |  |  |  | — |  |  |  | (4 | ) |  |  | (4 | )
Cost |  |  | 31,702 |  |  |  | 6,907 |  |  |  | 14,722 |  |  |  | 53,331 |
Accumulated amortization |  |  | 20,110 |  |  |  | — |  |  |  | 12,819 |  |  |  | 32,929 |
Balance as of December 31, 2018 |  |  | 11,592 |  |  |  | 6,907 |  |  |  | 1,903 |  |  |  | 20,402 |
(1) | Corresponds to adjustment for inflation of opening balances of intangible assets in subsidiaries with the Peso as functional currency which was charged to other comprehensive income.

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- 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 2018-01-01 -Paragraph 118 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=38&date=2018-03-01&anchor=para_118&doctype=Standard -URIDate 2018-03-16 + Details
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- Definition Text block [abstract] + References No definition available. + Details
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