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v3.19.3.a.u2

Assets and liabilities classified as held for sale - Additional Information (Detail) $ in Millions | Dec. 31, 2019 USD ($)
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Holiday Inn Melbourne Airport [member] | EMEAA [member] |
Assets and liabilities classified as held for sale [line items] |
Disposal group net assets disposed consideration receivable | $ 2

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- Definition Disclosure Of Assets And Liabilitites Classified As Held For Sale + References No definition available. + Details
Name: | ihg_DisclosureOfAssetsAndLiabilititesClassifiedAsHeldForSaleLineItems
Namespace Prefix: | ihg_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Disposal group net assets disposed consideration receivable. + References No definition available. + Details
Name: | ihg_DisposalGroupNetAssetsDisposedConsiderationReceivable
Namespace Prefix: | ihg_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Details
Name: | ihg_DisposalGroupsClassifiedAsHeldForSaleAxis=ihg_HolidayInnMelbourneAirportMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | ifrs-full_GeographicalAreasAxis=ihg_EMEAAMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |