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Impairment charges - (Tables) | 6 Months Ended
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Jun. 30, 2021
Disclosure of impairment loss and reversal of impairment loss [abstract] |
Summary of impairment charges |
| Six months ended 30 June 2021 | Six months ended 30 June 2020
| Pre-tax |  |  |  | Pre-tax
US$m |  |  |  | US$m
Aluminium – Pacific Aluminium | — |  |  |  | (489)
Aluminium - ISAL | — |  |  |  | (204)
Minerals – Diavik | — |  |  |  | (441)
Total impairment charge | — |  |  |  | (1,134)
Allocated as: |  |  |  |  |
Intangible assets | — |  |  |  | (4)
Property, plant and equipment | — |  |  |  | (1,011)
Investment in equity accounted units ('EAUs') | — |  |  |  | (119)
Total impairment charge | — |  |  |  | (1,134)
Comprising: |  |  |  |  |
Impairment charges of consolidated balances | — |  |  |  |  | (1,015)
Impairment charges related to EAUs (pre-tax) | — |  |  |  |  | (148)
Total impairment charge | — |  |  |  |  | (1,163)
Taxation (including related to EAUs) | — |  |  |  |  | 130
Total impairment in the income statement | — |  |  |  |  | (1,033)

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- Definition The disclosure of an impairment loss recognised or reversed for a cash-generating unit. [Refer: Impairment loss; Reversal of impairment loss] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 36 -IssueDate 2020-01-01 -Paragraph 130 -Subparagraph d -Clause ii -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=36&code=ifrs-tx-2020-en-r&anchor=para_130_d_ii&doctype=Standard -URIDate 2020-01-01 + Details
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