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COST OF SALES (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019
Disclosure of Detailed Information About Cost of Sales [Line Items] |  |
Direct mining cost | $ 4,716 | $ 4,504
Depreciation | 2,208 | 2,032
Royalty expense | 464 | 342
Community relations | 29 | 33
Cost of sales | 7,417 | 6,911
Inventory reduction amount | 29 | 26
Employee benefits expense | 1,520 | 1,350
Gold[member] |  |
Disclosure of Detailed Information About Cost of Sales [Line Items] |  |
Direct mining cost | 4,421 | 4,274
Depreciation | 1,975 | 1,902
Royalty expense | 410 | 308
Community relations | 26 | 30
Cost of sales | 6,832 | 6,514
Copper |  |
Disclosure of Detailed Information About Cost of Sales [Line Items] |  |
Direct mining cost | 292 | 224
Depreciation | 208 | 100
Royalty expense | 54 | 34
Community relations | 2 | 3
Cost of sales | 556 | 361
Other |  |
Disclosure of Detailed Information About Cost of Sales [Line Items] |  |
Direct mining cost | 3 | 6
Depreciation | 25 | 30
Royalty expense | 0 | 0
Community relations | 1 | 0
Cost of sales | $ 29 | $ 36

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- Definition The amount of costs relating to expenses directly or indirectly attributed to the goods or services sold, which may include, but are not limited to, costs previously included in the measurement of inventory that has now been sold, unallocated production overheads and abnormal amounts of production costs of inventories. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2019-01-01 -Paragraph 99 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2019-en-r&anchor=para_99&doctype=Standard -URIDate 2019-03-27 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2019-01-01 -Paragraph 103 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2019-en-r&anchor=para_103&doctype=Standard -URIDate 2019-03-27 + Details
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- Definition The amount of depreciation expense. Depreciation is the systematic allocation of depreciable amounts of tangible assets over their useful lives. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2019-01-01 -Paragraph 112 -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2019-en-r&anchor=para_112_c&doctype=Standard -URIDate 2019-03-27 + Details
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- Definition The amount of expense recognised related to the write-down of inventories to net realisable value. [Refer: Inventories] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 2 -IssueDate 2019-01-01 -Paragraph 36 -Subparagraph e -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=2&code=ifrs-tx-2019-en-r&anchor=para_36_e&doctype=Standard -URIDate 2019-03-27 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2019-01-01 -Paragraph 98 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2019-en-r&anchor=para_98_a&doctype=Standard -URIDate 2019-03-27 + Details
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