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Accounting policies - Additional Information (Detail) - USD ($) $ in Millions | 12 Months Ended |  |  |
--- | --- | --- | --- | ---
Dec. 31, 2022 | Jan. 01, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Accounting policies [line items] |  |  |  |
Depreciation method, property, plant and equipment | All depreciation is charged on a straight-line basis |  |  |
Payment terms of trade receivables | 30 days |  |  |
Restricted Cash and cash equivalents | $ 47 |  | $ 86 |
As Restated [Member] |  |  |  |
Accounting policies [line items] |  |  |  |
Restricted Cash and cash equivalents | 12 |  | 7 |
Restatement [Member] | Managed Hotels [Member] |  |  |  |
Accounting policies [line items] |  |  |  |
Insurance liabilities |  | $ 25 |  |
Loyalty programme liability [member] |  |  |  |
Accounting policies [line items] |  |  |  |
Increase (decrease) in fair value measurement due to reasonably possible increase in unobservable input, recognised in profit or loss, before tax, liabilities | 63 |  |  |
Loyalty programme liability [member] | System Fund [member] |  |  |  |
Accounting policies [line items] |  |  |  |
Deferred revenue | $ 1,411 |  | $ 1,292 | $ 1,245
Software [member] |  |  |  |
Accounting policies [line items] |  |  |  |
Amortisation method, intangible assets other than goodwill | straight-line |  |  |
Bottom of range [member] | Fixtures, fittings and equipment [member] |  |  |  |
Accounting policies [line items] |  |  |  |
Estimated useful lives | 3 years |  |  |
Bottom of range [member] | Software [member] |  |  |  |
Accounting policies [line items] |  |  |  |
Estimated useful lives | 3 years |  |  |
Bottom of range [member] | Software [member] | Guest Reservation System [member] |  |  |  |
Accounting policies [line items] |  |  |  |
Estimated useful lives | 7 years |  |  |
Top of range [member] | Buildings [member] |  |  |  |
Accounting policies [line items] |  |  |  |
Estimated useful lives | 50 years |  |  |
Top of range [member] | Fixtures, fittings and equipment [member] |  |  |  |
Accounting policies [line items] |  |  |  |
Estimated useful lives | 25 years |  |  |
Top of range [member] | Software [member] |  |  |  |
Accounting policies [line items] |  |  |  |
Estimated useful lives | 5 years |  |  |
Top of range [member] | Software [member] | Guest Reservation System [member] |  |  |  |
Accounting policies [line items] |  |  |  |
Estimated useful lives | 10 years |  |  |

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- Definition The amortisation method used for intangible assets other than goodwill with finite useful lives. [Refer: Intangible assets other than goodwill; Depreciation and amortisation expense] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 38 -IssueDate 2022-03-24 -Paragraph 118 -Subparagraph b -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=38&code=ifrs-tx-2022-en-r&anchor=para_118_b&doctype=Standard -URIDate 2022-03-24 + Details
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- Definition The depreciation method used for property, plant and equipment. [Refer: Property, plant and equipment] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 16 -IssueDate 2022-03-24 -Paragraph 73 -Subparagraph b -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=16&code=ifrs-tx-2022-en-r&anchor=para_73_b&doctype=Standard -URIDate 2022-03-24 + Details
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- Definition The description of the significant payment terms in contracts with customers. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 15 -IssueDate 2022-03-24 -Paragraph 119 -Subparagraph b -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=15&code=ifrs-tx-2022-en-r&anchor=para_119_b&doctype=Standard -URIDate 2022-03-24 + Details
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- Definition The amount of increase (decrease) in the fair value measurement of liabilities, recognised in profit or loss before tax, due to a reasonably possible increase in an unobservable input. [Refer: Tax income (expense)] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IFRS -Number 13 -IssueDate 2022-03-24 -Paragraph 93 -Subparagraph h -Clause ii -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=13&code=ifrs-tx-2022-en-r&anchor=para_93_h_ii&doctype=Standard -URIDate 2022-03-24 + Details
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- Definition The amount of cash and cash equivalents whose use or withdrawal is restricted. [Refer: Cash and cash equivalents] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2022-03-24 -Paragraph 55 -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2022-en-r&anchor=para_55&doctype=Standard -URIDate 2022-03-24 + Details
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- Definition The useful life, measured as period of time, used for intangible assets other than goodwill. [Refer: Intangible assets other than goodwill] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 38 -IssueDate 2022-03-24 -Paragraph 118 -Subparagraph a -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=38&code=ifrs-tx-2022-en-r&anchor=para_118_a&doctype=Standard -URIDate 2022-03-24 + Details
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- Definition The useful life, measured as period of time, used for property, plant and equipment. [Refer: Property, plant and equipment] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 16 -IssueDate 2022-03-24 -Paragraph 73 -Subparagraph c -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=16&code=ifrs-tx-2022-en-r&anchor=para_73_c&doctype=Standard -URIDate 2022-03-24 + Details
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- Definition Accounting policies. + References No definition available. + Details
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