The evolution of the Group’s intangible assets for the years ended December 31, 2017, 2016 and 2015 is as follows:
| Service concession | Exploration rights | Other intangibles | Total | |||||||||||||
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Cost |
5,707 | 1,975 | 2,607 | 10,289 | ||||||||||||
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Accumulated amortization |
3,475 | 150 | 2,271 | 5,896 | ||||||||||||
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Balance as of December 31, 2014 |
2,232 | 1,825 | 336 | 4,393 | ||||||||||||
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Cost |
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Increases |
653 | 270 | 190 | 1,113 | ||||||||||||
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Translation effect |
3,218 | 928 | 1,443 | 5,589 | ||||||||||||
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Decreases and reclassifications |
(51 | ) | (183 | ) | 20 | (214 | ) | |||||||||
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Accumulated amortization |
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Increases |
180 | — | 143 | 323 | ||||||||||||
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Translation effect |
1,904 | 5 | 1,296 | 3,205 | ||||||||||||
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Decreases and reclassifications |
(6 | ) | — | — | (6 | ) | ||||||||||
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Cost |
9,527 | 2,990 | 4,260 | 16,777 | ||||||||||||
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Accumulated amortization |
5,553 | 155 | 3,710 | 9,418 | ||||||||||||
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Balance as of December 31, 2015 |
3,974 | 2,835 | 550 | 7,359 | ||||||||||||
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Cost |
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Increases |
642 | 75 | 171 | 888 | ||||||||||||
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Translation effect |
2,127 | 612 | 936 | 3,675 | ||||||||||||
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Decreases and reclassifications |
(547 | ) | (584 | ) | 127 | (1,004 | ) | |||||||||
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Accumulated amortization |
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Increases |
437 | — | 280 | 717 | ||||||||||||
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Translation effect |
1,245 | — | 848 | 2,093 | ||||||||||||
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Decreases and reclassifications |
— | (6 | ) | — | (6 | ) | ||||||||||
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Cost |
11,749 | 3,093 | 5,494 | 20,336 | ||||||||||||
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Accumulated amortization |
7,235 | 149 | 4,838 | 12,222 | ||||||||||||
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Balance as of December 31, 2016 |
4,514 | 2,944 | 656 | 8,114 | ||||||||||||
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Cost |
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Increases |
947 | 8 | 198 | 1,153 | ||||||||||||
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Translation effect |
2,141 | 513 | 953 | 3,607 | ||||||||||||
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Decreases and reclassifications |
(13 | ) | (149 | ) | 185 | 23 | ||||||||||
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Accumulated amortization |
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Increases |
615 | — | 223 | 838 | ||||||||||||
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Translation effect |
1,330 | — | 885 | 2,215 | ||||||||||||
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Decreases and reclassifications |
— | (149 | ) | 17 | (132 | ) | ||||||||||
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Cost |
14,824 | 3,465 | 6,830 | 25,119 | ||||||||||||
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Accumulated amortization |
9,180 | 5,963 | 15,143 | |||||||||||||
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Balance as of December 31, 2017 |
5,644 | 3,465 | 867 | 9,976 | ||||||||||||
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