XML 371 R59.htm IDEA: XBRL DOCUMENT v3.23.1
Impairment charges net of reversals - (Tables)
 12 Months Ended
Dec. 31, 2021
Disclosure of impairment loss recognised or reversed for cash-generating unit [abstract]  
Summary of impairment charges net of reversals
Note
Pre-tax
amount
2021
US$m
Taxation
2021
US$m
Non-controlling
interest
2021
US$m
Net
amount
2021
US$m
Pre-tax
amount
2020
US$m
Pre-tax
amount
2019
US$m
Aluminium – Kitimat(269)72 — (197)— — 
Aluminium – Pacific Aluminium— — — — (489)— 
Aluminium – Sohar— — — — (220)— 
Aluminium – ISAL— — — — (93)(109)
Minerals – Diavik— — — — (441)— 
Copper – Oyu Tolgoi— — — — — (2,240)
Aluminium - Yarwun alumina refinery— — — — — (1,138)
Total impairment charges net of reversals(269)72 — (197)(1,243)(3,487)

Allocated as:
Intangible assets13 — (4)(1)
Property, plant and equipment14 (269)(900)(3,486)
Investment in equity accounted units (“EAUs”)— (339)— 
Total impairment charges net of reversals(269)(1,243)(3,487)
Comprising:
Impairment charges of consolidated balances(269)(904)(3,487)
Impairment charges related to EAUs (pre-tax)— (368)— 
Total impairment charges net of reversals(269)(1,272)(3,487)
Taxation (including related to EAUs)72 157 323 
Non-controlling interests— — 1,506 
Total impairment charges net of reversals in the income statement(197)(1,115)(1,658)