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Impairment charges - (Tables)

12 Months Ended

Dec. 31, 2020

Disclosure of impairment loss recognised or reversed for cash-generating unit [abstract]

Summary of impairment charges


			Note			Pre-tax amount 2020 US$m			Taxation 2020 US$m			Non-controlling interest 2020 US$m			Net amount 2020 US$m			Pre-tax amount 2019 US$m			Pre-tax amount 2018 US$m
Aluminium – Pacific Aluminium						(489)			17			—			(472)			—
Aluminium – Sohar						(220)			—			—			(220)			—			—


Aluminium – ISAL						(93)			(38)			—			(131)			(109)			(123)
Copper & Diamonds – Diavik						(441)			149			—			(292)			—
Copper & Diamonds – Oyu Tolgoi						—			—			—			—			(2,240)			—

Aluminium - Yarwun alumina refinery						—			—			—			—			(1,138)			—
Energy & Minerals – Rössing						—			—			—			—			—			(9)
Total impairment charge						(1,243)			128			—			(1,115)			(3,487)			(132)

Allocated as:









Intangible assets			13			(4)												(1)			(2)















Property, plant and equipment			14			(900)												(3,486)			(130)
Investment in equity accounted units ("EAUs")						(339)												—			—

Total impairment charge						(1,243)												(3,487)			(132)
Comprising:
Impairment charges of consolidated balances															(904)			(3,487)			(132)
Impairment charges related to EAUs (pre-tax)															(368)			—			—
Total impairment charge															(1,272)			(3,487)			(132)
Taxation (including related to EAUs)															157			323			25
Non-controlling interests															—			1,506			3
Total impairment in the income statement															(1,115)			(1,658)			(104)