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Segmental Information - Additional Information (Detail) $ in Millions | 12 Months Ended
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Dec. 31, 2021 USD ($) Segment | Dec. 31, 2020 USD ($) | Dec. 31, 2019 USD ($)
Disclosure of reportable segments [line items] |  |  |
Number of reportable segments | Segment | 4 |  |
Gain on disposal of hotel assets | $ 11 | $ 16 | $ 21
Americas [Member] |  |  |
Disclosure of reportable segments [line items] |  |  |
Proceeds from business interruption insurance |  | 4 | $ 10
Litigation settlement |  | 4 |
EMEAA [Member] |  |  |
Disclosure of reportable segments [line items] |  |  |
Gain on disposal of hotel assets |  | $ 3 |
Income from government grants | $ 5 |  |
Geographic concentration risk2 [member] | Revenue [member] |  |  |
Disclosure of reportable segments [line items] |  |  |
Concentration risk benchmark | revenue relating to an individual country is separately disclosed when it represents 10% or more of total revenue |  |
Concentration risk percentage | 10.00% |  |
Geographic concentration risk2 [member] | Non-current Assets [member] |  |  |
Disclosure of reportable segments [line items] |  |  |
Concentration risk benchmark | non-current assets relating to an individual country are separately disclosed when they represent 10% or more of total non-current assets |  |
Concentration risk percentage | 10.00% |  |

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- Definition The amount of income recognised in relation to government grants. [Refer: Government grants] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 20 -IssueDate 2021-01-01 -Paragraph 39 -Subparagraph b -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=20&code=ifrs-tx-2021-en-r&anchor=para_39_b&doctype=Standard -URIDate 2021-03-24 + Details
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