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Accounting policies - Additional Information (Detail) € in Millions, $ in Millions | 1 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | ---
Nov. 30, 2023 EUR (€) | Dec. 31, 2023 USD ($) | Dec. 31, 2022 USD ($) | Dec. 31, 2021 USD ($) | Dec. 31, 2023 EUR (€) | Dec. 31, 2022 EUR (€)
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 |  |  |  |  |  |
Noncurrent insurance liabilities |  |  | $ 23 |  |  |  |  |
Current insurance liabilities |  |  | 9 |  |  |  |  |
Insurance revenue |  | $ 21 | 15 | [1] | $ 9 | [1] |  |
Insurance expense |  | 23 | 11 | [1] | 8 | [1] |  |
2028 [member] |  |  |  |  |  |  |  |
Accounting policies [line items] |  |  |  |  |  |  |  |
Revolving credit facility exercised |  | $ 1,350 |  |  |  |  |  |
EUR500m 1.625% bonds 2024 [member] |  |  |  |  |  |  |  |
Accounting policies [line items] |  |  |  |  |  |  |  |
Notional amount | € |  |  |  |  |  |  | € 500 | € 500
Amount of debt under consideration | € |  |  |  |  |  |  | 500 |
EUR600m 4.375% bonds 2029 [member] |  |  |  |  |  |  |  |
Accounting policies [line items] |  |  |  |  |  |  |  |
Notional amount | € | € 600 |  |  |  |  |  | € 600 |
Long term debt term | 6 years |  |  |  |  |  |  |
Intercontinental Hotels Boston [Member] |  |  |  |  |  |  |  |
Accounting policies [line items] |  |  |  |  |  |  |  |
Percentage of margin before the asset gets impaired fully |  | 25.00% |  |  |  |  |  |
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 |  | $ 75 |  |  |  |  |  |
Loyalty programme liability [member] | System Fund [member] |  |  |  |  |  |  |  |
Accounting policies [line items] |  |  |  |  |  |  |  |
Deferred revenue |  | $ 1,529 | $ 1,411 |  | $ 1,292 |  |  |
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 |  |  |  |  |  |
[1] | Re-presented for the adoption of IFRS 17 ‘Insurance Contracts’ and to combine System Fund revenues and reimbursables (see New accounting standards and other presentational changes).

X
- 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 2023-01-01 -Paragraph 118 -Subparagraph b -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=38&code=ifrs-tx-2023-en-r&anchor=para_118_b&doctype=Standard -URIDate 2023-03-23 + 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 2023-01-01 -Paragraph 73 -Subparagraph b -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=16&code=ifrs-tx-2023-en-r&anchor=para_73_b&doctype=Standard -URIDate 2023-03-23 + 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 2023-01-01 -Paragraph 119 -Subparagraph b -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=15&code=ifrs-tx-2023-en-r&anchor=para_119_b&doctype=Standard -URIDate 2023-03-23 + 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 2023-01-01 -Paragraph 93 -Subparagraph h -Clause ii -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=13&code=ifrs-tx-2023-en-r&anchor=para_93_h_ii&doctype=Standard -URIDate 2023-03-23 + Details
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- Definition The amount of expense arising from purchased insurance. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2023-01-01 -Paragraph 112 -Subparagraph c -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2023-en-r&anchor=para_112_c&doctype=Standard -URIDate 2023-03-23 + Details
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- Definition The amount of revenue arising from the groups of insurance contracts issued. Insurance revenue shall depict the provision of services arising from the group of insurance contracts at an amount that reflects the consideration to which the entity expects to be entitled in exchange for those services. [Refer: Insurance contracts issued [member]; Revenue] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 17 -IssueDate 2023-01-01 -Paragraph 80 -Subparagraph a -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=17&code=ifrs-tx-2023-en-r&anchor=para_80_a&doctype=Standard -URIDate 2023-03-23 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 17 -IssueDate 2023-01-01 -Paragraph 106 -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=17&code=ifrs-tx-2023-en-r&anchor=para_106&doctype=Standard -URIDate 2023-03-23 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2023-01-01 -Paragraph 82 -Subparagraph a -Clause ii -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2023-en-r&anchor=para_82_a_ii&doctype=Standard -URIDate 2023-03-23 + 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 2023-01-01 -Paragraph 118 -Subparagraph a -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=38&code=ifrs-tx-2023-en-r&anchor=para_118_a&doctype=Standard -URIDate 2023-03-23 + Details
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- Definition Accounting policies. + References No definition available. + Details
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- Definition Amount of debt under consideration. + References No definition available. + Details
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- Definition Current insurance liabilities. + References No definition available. + Details
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- Definition Noncurrent insurance liabilities. + References No definition available. + Details
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- Definition Percentage of margin before the asset gets impaired fully. + References No definition available. + Details
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- Definition Revolving credit facility exercised. + References No definition available. + Details
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