Taxation - Narrative (Details) - USD ($) $ in Millions |
12 Months Ended | |
|---|---|---|
Dec. 31, 2023 |
Dec. 31, 2022 |
|
| Disclosure Of Income Taxes [Line Items] | ||
| Deferred tax asset | $ 6,454 | $ 7,815 |
| Planning horizon | 10 years | |
| Deferred tax assets dependent on future taxable profits | $ 2,027 | 4,202 |
| Unrecognised taxable temporary differences associated with undistributed retained earnings of investments in subsidiaries, joint ventures and associates | 5,311 | 5,521 |
| Unrecognised deductible temporary differences, unused tax losses and credits carried forward | 28,460 | 32,491 |
| Unrecognised deductible temporary differences, unused tax losses and credits carried forward that are subject to time limits for utilisation of five years or later or are not time limited | 25,489 | 28,199 |
| Brazil, Malaysia and Australia | ||
| Disclosure Of Income Taxes [Line Items] | ||
| Deferred tax asset | $ 241 | $ 303 |