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INTANGIBLE ASSETS, NET (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019
Disclosure of detailed information about intangible assets [line items] |  |
Intangible assets and goodwill, beginning balance | $ 943,838 | $ 1,012,524
Translation differences |  | (463)
Additions | 51,577 | 68,657
Transfers | 1,016 | (736)
Depreciation charge | (87,848) | (136,144)
Intangible assets and goodwill, ending balance | 908,583 | 943,838
Cost |  |
Disclosure of detailed information about intangible assets [line items] |  |
Intangible assets and goodwill, beginning balance | 1,960,286 | 1,901,185
Intangible assets and goodwill, ending balance | 2,012,772 | 1,960,286
Accumulated depreciation |  |
Disclosure of detailed information about intangible assets [line items] |  |
Intangible assets and goodwill, beginning balance | (1,016,448) | (888,661)
Intangible assets and goodwill, ending balance | (1,104,189) | (1,016,448)
Information system projects |  |
Disclosure of detailed information about intangible assets [line items] |  |
Intangible assets and goodwill, beginning balance | 74,381 | 71,761
Translation differences |  | (463)
Additions | 25,698 | 31,812
Transfers | 1,021 | (738)
Depreciation charge | (25,259) | (27,991)
Intangible assets and goodwill, ending balance | 75,841 | 74,381
Information system projects | Cost |  |
Disclosure of detailed information about intangible assets [line items] |  |
Intangible assets and goodwill, beginning balance | 342,857 | 320,600
Intangible assets and goodwill, ending balance | 369,468 | 342,857
Information system projects | Accumulated depreciation |  |
Disclosure of detailed information about intangible assets [line items] |  |
Intangible assets and goodwill, beginning balance | (268,476) | (248,839)
Intangible assets and goodwill, ending balance | (293,627) | (268,476)
Mining assets |  |
Disclosure of detailed information about intangible assets [line items] |  |
Intangible assets and goodwill, beginning balance | 104,517 | 76,288
Translation differences |  | 0
Additions | 2,034 | 12,580
Transfers | 17,141 | 27,954
Depreciation charge | (11,078) | (12,305)
Intangible assets and goodwill, ending balance | 112,614 | 104,517
Mining assets | Cost |  |
Disclosure of detailed information about intangible assets [line items] |  |
Intangible assets and goodwill, beginning balance | 256,736 | 216,203
Intangible assets and goodwill, ending balance | 275,912 | 256,736
Mining assets | Accumulated depreciation |  |
Disclosure of detailed information about intangible assets [line items] |  |
Intangible assets and goodwill, beginning balance | (152,219) | (139,915)
Intangible assets and goodwill, ending balance | (163,298) | (152,219)
Exploration and evaluation costs |  |
Disclosure of detailed information about intangible assets [line items] |  |
Intangible assets and goodwill, beginning balance | 19,522 | 23,209
Translation differences |  | 0
Additions | 23,845 | 24,265
Transfers | (17,146) | (27,952)
Depreciation charge | 0 | 0
Intangible assets and goodwill, ending balance | 26,221 | 19,522
Exploration and evaluation costs | Cost |  |
Disclosure of detailed information about intangible assets [line items] |  |
Intangible assets and goodwill, beginning balance | 19,522 | 23,209
Intangible assets and goodwill, ending balance | 26,221 | 19,522
Exploration and evaluation costs | Accumulated depreciation |  |
Disclosure of detailed information about intangible assets [line items] |  |
Intangible assets and goodwill, beginning balance | 0 | 0
Intangible assets and goodwill, ending balance | 0 | 0
Customer relationships and other contractual rights |  |
Disclosure of detailed information about intangible assets [line items] |  |
Intangible assets and goodwill, beginning balance | 83,111 | 178,959
Translation differences |  | 0
Additions | 0 | 0
Transfers | 0 | 0
Depreciation charge | (51,511) | (95,848)
Intangible assets and goodwill, ending balance | 31,600 | 83,111
Customer relationships and other contractual rights | Cost |  |
Disclosure of detailed information about intangible assets [line items] |  |
Intangible assets and goodwill, beginning balance | 604,929 | 604,931
Intangible assets and goodwill, ending balance | 604,929 | 604,929
Customer relationships and other contractual rights | Accumulated depreciation |  |
Disclosure of detailed information about intangible assets [line items] |  |
Intangible assets and goodwill, beginning balance | (521,818) | (425,972)
Intangible assets and goodwill, ending balance | (573,329) | (521,818)
Trademarks |  |
Disclosure of detailed information about intangible assets [line items] |  |
Intangible assets and goodwill, beginning balance | 0 | 0
Translation differences |  | 0
Additions | 0 | 0
Transfers | 0 | 0
Depreciation charge | 0 | 0
Intangible assets and goodwill, ending balance | 0 | 0
Trademarks | Cost |  |
Disclosure of detailed information about intangible assets [line items] |  |
Intangible assets and goodwill, beginning balance | 73,935 | 73,935
Intangible assets and goodwill, ending balance | 73,935 | 73,935
Trademarks | Accumulated depreciation |  |
Disclosure of detailed information about intangible assets [line items] |  |
Intangible assets and goodwill, beginning balance | (73,935) | (73,935)
Intangible assets and goodwill, ending balance | (73,935) | (73,935)
Goodwill |  |
Disclosure of detailed information about intangible assets [line items] |  |
Intangible assets and goodwill, beginning balance | 662,307 | 662,307
Translation differences |  | 0
Additions | 0 | 0
Transfers | 0 | 0
Depreciation charge | 0 | 0
Intangible assets and goodwill, ending balance | 662,307 | 662,307
Goodwill | Cost |  |
Disclosure of detailed information about intangible assets [line items] |  |
Intangible assets and goodwill, beginning balance | 662,307 | 662,307
Intangible assets and goodwill, ending balance | 662,307 | 662,307
Goodwill | Accumulated depreciation |  |
Disclosure of detailed information about intangible assets [line items] |  |
Intangible assets and goodwill, beginning balance | 0 | 0
Intangible assets and goodwill, ending balance | $ 0 | $ 0

X
- Definition The amount of additions to intangible assets other than goodwill, other than those acquired through business combinations. [Refer: Business combinations [member]; Intangible assets other than goodwill] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 38 -IssueDate 2020-01-01 -Paragraph 118 -Subparagraph e -Clause i -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=38&code=ifrs-tx-2020-en-r&anchor=para_118_e_i&doctype=Standard -URIDate 2020-01-01 + Details
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