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Insurance - Additional Information (Detail) - USD ($) $ in Millions | Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
--- | --- | --- | ---
Statement [Line Items] |  |  |
Insurance contracts that are liabilities | $ 37 | $ 32 | $ 25
International general liability principally for managed hotels [member] |  |  |
Statement [Line Items] |  |  |
Insurance contracts that are liabilities | 19 | 21 |
Managed hotels [member] |  |  |
Statement [Line Items] |  |  |
Maximum liabilities last five policy years | 14 | 7 |
Owned and leased properties [member] |  |  |
Statement [Line Items] |  |  |
Maximum liabilities last five policy years | $ 49 | $ 42 |

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- Definition The amount of insurance contracts that are liabilities. [Refer: Liabilities; Insurance contracts [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 17 -IssueDate 2023-01-01 -Paragraph 99 -Subparagraph b -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=17&code=ifrs-tx-2023-en-r&anchor=para_99_b&doctype=Standard -URIDate 2023-03-23 + Details
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Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Maximum liabilities last five policy years. + References No definition available. + Details
Name: | ihg_MaximumLiabilitiesLastFivePolicyYears
Namespace Prefix: | ihg_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Statement [Line Items] + References No definition available. + Details
Name: | ihg_StatementLineItems
Namespace Prefix: | ihg_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | ihg_InsuranceReserveAxis=ihg_InternationalGeneralLiabilityPrincipallyForManagedHotelsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | ihg_InsuranceReserveAxis=ihg_ManagedHotelsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | ihg_InsuranceReserveAxis=ihg_OwnedAndLeasedPropertiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |