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Property, plant and equipment - Additional Information (Detail) $ in Millions | 12 Months Ended
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Dec. 31, 2023 Hotel | Dec. 31, 2022 USD ($) Hotel
Disclosure of detailed information about property, plant and equipment [line items] |  |
Number of open hotels | Hotel | 17 | 16
UK Portfolio [Member] |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |
Pre-tax discount rate |  | 14.20%
EMEAA [Member] |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |
Impairment loss recognised in profit or loss, property, plant and equipment |  | $ 10
Percentage of net book value of property, plant and equipment relating to largest owned and leased hotel |  | 9.60%
Right-of-use assets [member] | EMEAA [Member] |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |
Impairment Charge |  | $ 2
Pre-tax discount rate |  | 17.60%
Recoverable amount of asset or cash-generating unit |  | $ 9
Property, plant and equipment [member] | EMEAA [Member] |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |
Recoverable amount of asset or cash-generating unit |  | 0
UK Portfolio [Member] |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |
Impairment reversal |  | $ 3

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