Taxation - Narrative (Details) - USD ($) $ in Millions |
Dec. 31, 2025 |
Dec. 31, 2024 |
|---|---|---|
| Disclosure Of Income Taxes [Line Items] | ||
| Deferred tax asset | $ 8,173 | $ 6,857 |
| Deferred tax assets dependent on future taxable profits | 6,166 | 4,022 |
| Unrecognised deductible temporary differences, unused tax losses and credits carried forward | 29,026 | 27,568 |
| 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 | 27,303 | 25,875 |
| Unrecognised taxable temporary differences associated with undistributed retained earnings of investments in subsidiaries, joint ventures and associates | 3,662 | 4,504 |
| Brazil, Malaysia and Australia | ||
| Disclosure Of Income Taxes [Line Items] | ||
| Deferred tax asset | 1,079 | 625 |
| Chemical & products and Marketing | ||
| Disclosure Of Income Taxes [Line Items] | ||
| Deferred tax asset | $ 283 | $ 315 |
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- Definition The amount of deferred tax asset when: (a) the utilisation of the deferred tax asset is dependent on future taxable profits in excess of the profits arising from the reversal of existing taxable temporary differences; and (b) the entity has suffered a loss in either the current or preceding period in the tax jurisdiction to which the deferred tax asset relates. [Refer: Temporary differences [member]] Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition The amounts of income taxes recoverable in future periods in respect of: (a) deductible temporary differences; (b) the carryforward of unused tax losses; and (c) the carryforward of unused tax credits. [Refer: Temporary differences [member]; Unused tax credits [member]; Unused tax losses [member]] Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition The aggregate amount of temporary differences associated with investments in subsidiaries, branches and associates and interests in joint arrangements, for which deferred tax liabilities have not been recognised as a result of satisfying both of the following conditions: (a) the parent, investor, joint venturer or joint operator is able to control the timing of the reversal of the temporary difference; and (b) it is probable that the temporary difference will not reverse in the foreseeable future. [Refer: Total for all associates [member]; Total for all subsidiaries [member]; Temporary differences [member]; Investments in subsidiaries reported in separate financial statements] Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition The amount of unused tax credits for which no deferred tax asset is recognised in the statement of financial position. [Refer: Unused tax credits [member]] Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Income taxes. No definition available.
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- Definition Unused tax credits for which no deferred tax asset recognised subject to time limits, for utilisation of five years or later or not time limited. No definition available.
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