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Tax - Deferred Tax - Additional Information (Detail) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2024 | Dec. 31, 2023
Disclosure of income tax reconciliation [line items] |  |
Deferred tax assets | $ 122 | $ 134
Deferred tax assets recognized related to legal entities which suffered tax loss | 3 | 0
Deferred tax assets liabilities net threshold | 10 |
United Kingdom [member] |  |
Disclosure of income tax reconciliation [line items] |  |
Deferred tax assets | $ 99 | 113
Deferred Tax Asset Offset Percentage On Annual Profits (50% restriction on deferred tax losses) | 50.00% |
Deferred Tax Assets Relating To Revenue Losses | $ 62 | $ 73
United Kingdom [member] | Bottom of range [member] |  |
Disclosure of income tax reconciliation [line items] |  |
Deferred Tax Asset Reverse Period | 6 years | 7 years
United Kingdom [member] | Top of range [member] |  |
Disclosure of income tax reconciliation [line items] |  |
Deferred Tax Asset Reverse Period | 10 years | 10 years
Unprovided deferred tax on unremitted earnings [member] |  |
Disclosure of income tax reconciliation [line items] |  |
Unremitted earnings on which no deferred tax provided | $ 500 | $ 500

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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]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 12 -IssueDate 2024-01-01 -Paragraph 81 -Subparagraph g -Clause i -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=12&code=ifrs-tx-2024-en-r&anchor=para_81_g_i&doctype=Standard -URIDate 2024-03-27 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2024-01-01 -Paragraph 54 -Subparagraph o -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_54_o&doctype=Standard -URIDate 2024-03-27 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2024-01-01 -Paragraph 56 -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_56&doctype=Standard -URIDate 2024-03-27 + Details
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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] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 12 -IssueDate 2024-01-01 -Paragraph 81 -Subparagraph f -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=12&code=ifrs-tx-2024-en-r&anchor=para_81_f&doctype=Standard -URIDate 2024-03-27 + Details
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- Definition Deferred tax asset offset percentage on annual profits. + References No definition available. + Details
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- Definition Deferred tax asset reverse period. + References No definition available. + Details
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- Definition Deferred tax assets liabilities net threshold. + References No definition available. + Details
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- Definition Deferred tax assets recognised in loss making entities. + References No definition available. + Details
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- Definition Deferred tax assets relating to revenue losses. + References No definition available. + Details
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- Definition Disclosure of income tax reconciliation. + References No definition available. + Details
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- Details
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- Details
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