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v3.25.0.1

Tax - Tax Paid - Additional Information (Detail) $ in Millions | 12 Months Ended
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Dec. 31, 2024 USD ($)
United Kingdom [member] |
Disclosure of income tax reconciliation [line items] |
Direct tax paid | $ 5

X
- Definition Disclosure of income tax reconciliation. + References No definition available. + Details
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Namespace Prefix: | ihg_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Income tax paid. + References No definition available. + Details
Name: | ihg_IncomeTaxPaid
Namespace Prefix: | ihg_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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