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Impairment charges net of reversals - Summary of impairment charges (Detail) - USD ($) $ in Millions | 1 Months Ended | 12 Months Ended
--- | --- | ---
Jun. 30, 2024 | Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Disclosure of impairment loss recognised or reversed for cash-generating unit [line items] |  |  |  |
Impairment charges, pre-tax amount |  | $ (561) | $ (936) | $ (52)
Impairment charges, taxation |  | 27 |  |
Impairment charges, non-controlling interest |  | 0 | (215) | 0
Total impairment charges net of reversals in the income statement |  | (534) | (652) | (52)
Net impairment (charges)/reversals of consolidated balances |  | (538) | (936) | 150
Impairment (charges) related to EAUs (pre-tax) |  | (35) | 0 | (202)
Total impairment charges net of reversals in the financial information by business unit |  | (573) | (936) | (52)
Taxation (including related to EAUs) |  | 39 | 499 | 0
Intangible assets |  |  |  |
Disclosure of impairment loss recognised or reversed for cash-generating unit [line items] |  |  |  |
Impairment charges, pre-tax amount |  | 0 | 231 | 150
Property, plant and equipment |  |  |  |
Disclosure of impairment loss recognised or reversed for cash-generating unit [line items] |  |  |  |
Impairment charges, pre-tax amount |  | (538) | (1,167) | 0
Investment in equity accounted units |  |  |  |
Disclosure of impairment loss recognised or reversed for cash-generating unit [line items] |  |  |  |
Impairment charges, pre-tax amount |  | 0 | 0 | (202)
Share Of Profit (Loss) After Tax In EAUs |  |  |  |
Disclosure of impairment loss recognised or reversed for cash-generating unit [line items] |  |  |  |
Impairment charges, pre-tax amount |  | (23) | 0 | 0
Aluminium | Alumina Refineries |  |  |  |
Disclosure of impairment loss recognised or reversed for cash-generating unit [line items] |  |  |  |
Impairment charges, pre-tax amount |  | (461) | (1,175) | 0
Impairment charges, taxation |  | (42) |  |
Impairment charges, non-controlling interest |  | 0 |  |
Total impairment charges net of reversals in the income statement |  | (503) | (828) |
Net impairment (charges)/reversals of consolidated balances |  |  | (1,175) |
Aluminium | Tiwai Point |  |  |  |
Disclosure of impairment loss recognised or reversed for cash-generating unit [line items] |  |  |  |
Impairment charges, pre-tax amount | $ 41 | 41 | 0 | 0
Impairment charges, taxation |  | 37 |  |
Impairment charges, non-controlling interest |  | 0 |  |
Total impairment charges net of reversals in the income statement |  | 78 |  |
Aluminium | MRN Porto Trombetas |  |  |  |
Disclosure of impairment loss recognised or reversed for cash-generating unit [line items] |  |  |  |
Impairment charges, pre-tax amount |  | (23) | 0 | 0
Impairment charges, taxation |  | 0 |  |
Impairment charges, non-controlling interest |  | 0 |  |
Total impairment charges net of reversals in the income statement |  | (23) |  |
Aluminium | Pacific Aluminium |  |  |  |
Disclosure of impairment loss recognised or reversed for cash-generating unit [line items] |  |  |  |
Impairment charges, pre-tax amount |  | 0 | 0 | (202)
Impairment charges, taxation |  | 0 |  |
Impairment charges, non-controlling interest |  | 0 |  |
Total impairment charges net of reversals in the income statement |  | 0 |  |
Minerals | Diavik |  |  |  |
Disclosure of impairment loss recognised or reversed for cash-generating unit [line items] |  |  |  |
Impairment charges, pre-tax amount |  | (118) | 0 | 0
Impairment charges, taxation |  | 32 |  |
Impairment charges, non-controlling interest |  | 0 |  |
Total impairment charges net of reversals in the income statement |  | (86) |  |
Net impairment (charges)/reversals of consolidated balances |  | (118) |  |
Other operations | Simandou |  |  |  |
Disclosure of impairment loss recognised or reversed for cash-generating unit [line items] |  |  |  |
Impairment charges, pre-tax amount |  | 0 | 239 | 0
Impairment charges, taxation |  | 0 |  |
Impairment charges, non-controlling interest |  | 0 |  |
Total impairment charges net of reversals in the income statement |  | 0 |  |
Other operations | Roughrider |  |  |  |
Disclosure of impairment loss recognised or reversed for cash-generating unit [line items] |  |  |  |
Impairment charges, pre-tax amount |  | 0 | $ 0 | $ 150
Impairment charges, taxation |  | 0 |  |
Impairment charges, non-controlling interest |  | 0 |  |
Total impairment charges net of reversals in the income statement |  | $ 0 |  |

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