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Investment in Associates and joint ventures - Additional Information (Detail) $ in Millions | 12 Months Ended
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Dec. 31, 2023 Associate | Dec. 31, 2022 USD ($) Associate | Dec. 31, 2021 USD ($)
Americas Region [Member] |  |  |
Disclosure of investment in associates and joint ventures [line items] |  |  |
Investment in associates impairment reversal |  | $ 2 |
Discount rate applied to cash flow projections |  | 9.75% |
Terminal Capitalisation Rate |  | 7.25% |
111 East 48th Street Holdings LLC [member] |  |  |
Disclosure of investment in associates and joint ventures [line items] |  |  |
Material associate investment interest | 19.90% |  |
Name of associate | 111 East 48th Street Holdings LLC |  |
Barclay associate [member] |  |  |
Disclosure of investment in associates and joint ventures [line items] |  |  |
Number of material associate | Associate | 1 | 1 |
Material associate investment interest | 19.90% | 19.90% |
Description of nature of entity's relationship with associate | The Group held one associate investment which had a significant impact on profit for the current and prior year, a 19.9% interest in 111 East 48th Street Holdings, LLC (the ‘Barclay associate’) which owns InterContinental New York Barclay, a hotel managed by the Group. The investment is classified as an associate and equity accounted. While the Group has the ability to exercise significant influence through certain decision rights, approval rights relating to the hotel’s operating and capital budgets rest solely with the 80.1% majority member. The Group’s ability to receive cash dividends is dependent on the hotel generating sufficient income to satisfy specified owner returns. $18m was provided in 2021 in relation to settlement of a commercial dispute regarding owner returns during the pandemic. |  |
Barclay associate [member] | Dispute Settlement [Member] |  |  |
Disclosure of investment in associates and joint ventures [line items] |  |  |
Payment towards settlement of dispute |  |  | $ 18
Barclay associate [member] | 111 East 48th Street Holdings LLC [member] |  |  |
Disclosure of investment in associates and joint ventures [line items] |  |  |
Name of associate | 111 East 48th Street Holdings, LLC |  |
Material associate investment interest held by majority member | 80.10% |  |
Associates [member] | Americas Region [Member] |  |  |
Disclosure of investment in associates and joint ventures [line items] |  |  |
Explanation of period over which management has projected cash flows | 10-year |  |

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- Definition The discount rate applied to cash flow projections for a cash-generating unit (group of units). [Refer: Cash-generating units [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 36 -IssueDate 2023-01-01 -Paragraph 134 -Subparagraph d -Clause v -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=36&code=ifrs-tx-2023-en-r&anchor=para_134_d_v&doctype=Standard -URIDate 2023-03-23 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 36 -IssueDate 2023-01-01 -Paragraph 134 -Subparagraph e -Clause v -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=36&code=ifrs-tx-2023-en-r&anchor=para_134_e_v&doctype=Standard -URIDate 2023-03-23 + Details
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- Definition The description of the nature of the entity's relationship with an associate (for example, describing the nature of the activities of the associate and whether they are strategic to the entity's activities). [Refer: Associates [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 12 -IssueDate 2023-01-01 -Paragraph 21 -Subparagraph a -Clause ii -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=12&code=ifrs-tx-2023-en-r&anchor=para_21_a_ii&doctype=Standard -URIDate 2023-03-23 + Details
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- Definition The explanation of the period over which management has projected cash flows based on financial budgets/forecasts approved by management including, when a period greater than five years is used for a cash-generating unit (group of units), an explanation of why that longer period is justified. [Refer: Cash-generating units [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 36 -IssueDate 2023-01-01 -Paragraph 134 -Subparagraph d -Clause iii -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=36&code=ifrs-tx-2023-en-r&anchor=para_134_d_iii&doctype=Standard -URIDate 2023-03-23 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 36 -IssueDate 2023-01-01 -Paragraph 134 -Subparagraph e -Clause iii -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=36&code=ifrs-tx-2023-en-r&anchor=para_134_e_iii&doctype=Standard -URIDate 2023-03-23 + Details
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- Definition The name of an associate. [Refer: Associates [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 27 -IssueDate 2023-01-01 -Paragraph 17 -Subparagraph b -Clause i -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=27&code=ifrs-tx-2023-en-r&anchor=para_17_b_i&doctype=Standard -URIDate 2023-03-23 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 27 -IssueDate 2023-01-01 -Paragraph 16 -Subparagraph b -Clause i -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=27&code=ifrs-tx-2023-en-r&anchor=para_16_b_i&doctype=Standard -URIDate 2023-03-23 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 12 -IssueDate 2023-01-01 -Paragraph 21 -Subparagraph a -Clause i -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=12&code=ifrs-tx-2023-en-r&anchor=para_21_a_i&doctype=Standard -URIDate 2023-03-23 + Details
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