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Taxation - Summary of prima facie tax reconciliation (Detail) - USD ($) $ in Millions |  | 3 Months Ended | 6 Months Ended
--- | --- | --- | ---
Apr. 01, 2023 | Mar. 31, 2023 | Jun. 30, 2024 | Jun. 30, 2023
Major components of tax expense (income) [abstract] |  |  |  |
Profit before taxation |  |  | $ 8,115 | $ 6,930
Applicable tax rate | 25.00% | 19.00% | 25.00% | 23.50%
Prima facie tax payable at UK rate of 23.5% (2022: 19%) |  |  | $ 2,029 | $ 1,628
Higher rate of taxation of 30% on Australian earnings (2023: 30%) |  |  | 325 | 373
Other tax rates applicable outside the UK and Australia |  |  | (136) | (130)
Tax effect of profit from equity accounted units and related expenses |  |  | (106) | (101)
Impact of changes in tax rates |  |  | (15) | 0
Resource depletion allowances |  |  | (7) | (6)
Recognition of previously unrecognised deferred tax assets |  |  | (49) | (62)
Write-down of previously recognised deferred tax assets |  |  | 42 | 40
Utilisation of previously unrecognised deferred tax assets |  |  | (9) | (10)
Unrecognised current year operating losses |  |  | 146 | 259
Adjustments in respect of prior periods |  |  | 14 | (4)
Other items |  |  | (9) | (4)
Total taxation charge |  |  | $ 2,225 | $ 1,983
Weighted average statutory tax rate |  |  | 29.00% | 30.00%
Current tax expense |  |  | $ 1 |

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