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Provisions - Summary of Provisions (Paranthetical) (Detail) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2022 USD ($)
Disclosure of other provisions [line items] |
Provided | $ 54
Exceptional Items Member [Member] |
Disclosure of other provisions [line items] |
Provided | $ 28

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- Definition The amount of additional other provisions made. [Refer: Other provisions] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 37 -IssueDate 2022-03-24 -Paragraph 84 -Subparagraph b -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=37&code=ifrs-tx-2022-en-r&anchor=para_84_b&doctype=Standard -URIDate 2022-03-24 + Details
Name: | ifrs-full_AdditionalProvisionsOtherProvisions
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with members defined in one or many axes of the table. + References No definition available. + Details
Name: | ifrs-full_DisclosureOfOtherProvisionsLineItems
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | ihg_ConsolidatedExceptionalItemsAxis=ihg_ExceptionalitemsmemberMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |