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Property, plant and equipment - Additional Information (Detail) $ in Millions | 12 Months Ended
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Dec. 31, 2022 USD ($) Hotel | Dec. 31, 2021 Hotel | Dec. 31, 2020 USD ($)
Disclosure of detailed information about property, plant and equipment [line items] |  |  |
Number of open hotels | Hotel | 16 | 19 |
Impairment Charge |  |  | $ 43
System Fund [member] |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |
Impairment loss recognised in profit or loss, property, plant and equipment |  |  | 90
Property Plant And Equipment System Fund Impairment Charge |  |  | 5
US corporate headquarters [Member] |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |
Impairment loss recognised in profit or loss, property, plant and equipment |  |  | 7
US corporate headquarters [Member] | System Fund [member] |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |
Impairment loss recognised in profit or loss, property, plant and equipment |  |  | 5
North America Hotels [Member] |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |
Impairment Charge |  |  | 35
UK Portfolio [member] |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |
Post tax discount rate | 10.10% |  |
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% |  |
Development Land Sites [Member] | Americas [member] |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |
Impairment loss recognised in profit or loss, property, plant and equipment |  |  | 3
Right-of-use assets [member] |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |
Impairment Charge |  |  | 11
Right-of-use assets [member] | Americas [member] |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |
Impairment Charge |  |  | 5
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 loss recognised in profit or loss, property, plant and equipment |  |  | $ 50
Impairment reversal | $ 3 |  |
Pre-tax discount rate | 14.20% |  |

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