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v3.20.4

IMPAIRMENT AND REVERSAL OF NON-CURRENT ASSETS - Assumptions (Details) | 12 Months Ended
--- | ---
Dec. 31, 2020 USD ($) $ / pound | Dec. 31, 2019 USD ($) $ / pound
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items] |  |
Impairment (reversals) charges | $ (269,000,000) | $ (1,423,000,000)
Gold[member] |  |
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items] |  |
LOM year | 20 years | 19 years
Gold[member] | Average |  |
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items] |  |
NAV multiple | $ 1.3 | $ 1.2
WACC | 5.00% | 4.00%
Gold[member] | Minimum |  |
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items] |  |
WACC | 3.00% | 3.00%
Gold[member] | Maximum |  |
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items] |  |
WACC | 12.00% | 7.00%
Long-term | Copper |  |
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items] |  |
Mineral price (gold, in dollars per ounce; copper, in dollars per pound) | $ / pound | 3.00 | 3.00
Impairment (reversals) of long lived assets |  |
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items] |  |
Impairment (reversals) charges | $ (269,000,000) | $ (1,423,000,000)

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- Definition The discount rate used in the current measurement of fair value less costs of disposal. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 36 -IssueDate 2019-01-01 -Paragraph 130 -Subparagraph f -Clause iii -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=36&code=ifrs-tx-2019-en-r&anchor=para_130_f_iii&doctype=Standard -URIDate 2019-03-27 + Details
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- Definition The amount of impairment loss, impairment gain or reversal of impairment loss that is recognised in profit or loss in accordance with paragraph 5.5.8 of IFRS 9 and that arises from applying the impairment requirements in Section 5.5 of IFRS 9. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2019-01-01 -Paragraph 82 -Subparagraph ba -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2019-en-r&anchor=para_82_ba&doctype=Standard -URIDate 2019-03-27 + Details
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