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EXPLORATION, EVALUATION AND PROJECT EXPENSES (Details) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2020 | Dec. 31, 2019
Disclosure of detailed information about property, plant and equipment [line items] |  |
Global exploration and evaluation | $ 143 | $ 143
Corporate development2 | 9 | 51
Business improvement and innovation | 0 | 10
Minesite exploration and evaluation | 79 | 69
Exploration, evaluation and project expenses (notes 5 and 8) | 295 | 342
Acquisition-related costs for transaction recognised separately from acquisition of assets and assumption of liabilities in business combination | 0 | 18
Pascua-Lama |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |
Advanced project costs | 37 | 49
Other [Member] |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |
Advanced project costs | $ 27 | 20
Nevada Gold Mines, KCGM and Acacia [Member] |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |
Acquisition-related costs for transaction recognised separately from acquisition of assets and assumption of liabilities in business combination |  | $ 44

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- Definition Expense arising from exploration for and evaluation of mineral resources, minesite exploration and evaluation + References No definition available. + Details
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- Definition The amount of expense arising from the search for mineral resources, including minerals, oil, natural gas and similar non-regenerative resources after the entity has obtained legal rights to explore in a specific area, as well as the determination of the technical feasibility and commercial viability of extracting the mineral resource. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 6 -IssueDate 2019-01-01 -Paragraph 24 -Subparagraph b -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=6&code=ifrs-tx-2019-en-r&anchor=para_24_b&doctype=Standard -URIDate 2019-03-27 + Details
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