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Taxation - Summary of prima facie tax reconciliation (Detail) - USD ($) $ in Millions | 2 Months Ended | 10 Months Ended | 12 Months Ended
--- | --- | --- | ---
Dec. 31, 2024 | Oct. 31, 2024 | Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Income Taxes [Line Items] |  |  |  |  |
Profit before taxation |  |  | $ 15,615 | $ 13,785 | $ 18,662
Prima facie tax payable at UK rate |  |  | 3,904 | 3,239 | 3,546
Higher rate of taxation of 30% on Australian earnings |  |  | 613 | 835 | 1,550
Other tax rates applicable outside the UK and Australia |  |  | (303) | (2) | (17)
Tax effect of profit from equity accounted units, related impairments and expenses |  |  | (210) | (159) | (109)
Impact of changes in tax rates |  |  | (15) | (173) | (11)
Resource depletion allowances |  |  | (10) | (11) | (40)
Recognition of previously unrecognised deferred tax assets |  |  | (640) | (157) | (261)
Write-down of previously recognised deferred tax assets |  |  | 203 | 0 | 932
Utilisation of previously unrecognised deferred tax assets |  |  | (42) | (10) | (37)
Unrecognised current year operating losses |  |  | 185 | 567 | 212
Uncertain tax provision |  |  | 295 | 0 | 0
Deferred tax arising on internal sale of assets in Canadian operations |  |  | 0 | (364) | 0
Adjustments in respect of prior periods |  |  | (13) | 31 | (222)
Other items |  |  | 74 | 36 | 71
Total taxation charge |  |  | $ 4,041 | $ 3,832 | $ 5,614
Weighted average statutory corporation tax rate |  |  | 29.00% | 31.00% | 29.00%
Deferred tax arising on internal sale of assets in Canadian operations |  |  | $ 0 | $ 364 | $ 0
Current tax expense related to Pillar Two income taxes |  |  | $ 1 |  |
Energy Resources of Australia Ltd |  |  |  |  |
Income Taxes [Line Items] |  |  |  |  |
Group interest (voting %) | 98.43% | 86.30% | 98.43% |  |
Australia |  |  |  |  |
Income Taxes [Line Items] |  |  |  |  |
Recognition of previously unrecognised deferred tax assets |  |  | $ 443 |  |
Mongolia |  |  |  |  |
Income Taxes [Line Items] |  |  |  |  |
Uncertain tax provision |  |  | $ 295 |  |

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