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Goodwill and Other Intangible Assets - Additional Information (Detail) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Disclosure of reconciliation of changes in intangible assets and goodwill [line items] |  |  |
Information whether recoverable amount of asset is fair value less costs of disposal or value in use | The recoverable amounts of the CGUs, or groups of CGUs, have been determined from value in use calculations. |  |
Description of key assumptions on which management has based cash flow projections | The key assumptions are RevPAR growth (detailed on page 197 within ‘Going concern’), terminal growth rates and pre-tax discount rates. |  |
Description of growth rates used to extrapolate cash flow projections | terminal growth rates that do not exceed the average long-term growth rates for the relevant markets. |  |
Description of discount rates of applied to cash flow projections | pre-tax rates that are based on the Group’s weighted average cost of capital and incorporate adjustments reflecting risks specific to the territory of the CGU |  |
Impairment Loss Recognised In Replaced Asset | $ 5 |  |
Cash-generating units [member] |  |  |
Disclosure of reconciliation of changes in intangible assets and goodwill [line items] |  |  |
Impairment Charge | $ 0 |  |
Management agreements [member] |  |  |
Disclosure of reconciliation of changes in intangible assets and goodwill [line items] |  |  |
Weighted average remaining amortisation period | 13 years | 14 years |
Kimpton Management Agreement Portfolio [Member] |  |  |
Disclosure of reconciliation of changes in intangible assets and goodwill [line items] |  |  |
Explanation of impairment charge | strong trading conditions in 2022 and significantly improved industry forecasts. |  |
Kimpton Management Agreement Portfolio [Member] | Accumulated depreciation, amortisation and impairment [member] |  |  |
Disclosure of reconciliation of changes in intangible assets and goodwill [line items] |  |  |
Impairment reversal |  |  | $ 12
Intangible asset material to entity [member] | Computer software [member] |  |  |
Disclosure of reconciliation of changes in intangible assets and goodwill [line items] |  |  |
Goodwill and other intangible assets | $ 102 |  |
Intangible asset material to entity [member] | Computer software [member] | Internally generated [member] |  |  |
Disclosure of reconciliation of changes in intangible assets and goodwill [line items] |  |  |
Goodwill and other intangible assets | $ 80 |  |
Intangible asset material to entity [member] | Computer software [member] | Internally generated [member] | Minimum [Member] |  |  |
Disclosure of reconciliation of changes in intangible assets and goodwill [line items] |  |  |
Weighted average amortisation period | 7 years |  |
Weighted average remaining period | 4 years |  |
Intangible asset material to entity [member] | Computer software [member] | Internally generated [member] | Maximum [Member] |  |  |
Disclosure of reconciliation of changes in intangible assets and goodwill [line items] |  |  |
Weighted average amortisation period | 10 years |  |
Weighted average remaining period | 4 years |  |
Intangible asset material to entity [member] | Computer software [member] | Remaining Project Value [Member] |  |  |
Disclosure of reconciliation of changes in intangible assets and goodwill [line items] |  |  |
Weighted average amortisation period | 5 years |  |
Brands [member] | Kimpton [member] |  |  |
Disclosure of reconciliation of changes in intangible assets and goodwill [line items] |  |  |
Acquisitions of intangible asset | $ 193 |  |
Brands [member] | Six Senses [member] |  |  |
Disclosure of reconciliation of changes in intangible assets and goodwill [line items] |  |  |
Acquisitions of intangible asset | 189 |  |
Regent [member] | Brands [member] |  |  |
Disclosure of reconciliation of changes in intangible assets and goodwill [line items] |  |  |
Acquisitions of intangible asset | $ 57 |  |

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