XML 462 R190.htm IDEA: XBRL DOCUMENT
v3.24.0.1

Equity - Summary of Shares Held By Employee Share Trusts (Detail) - USD ($) shares in Millions, $ in Millions | Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
--- | --- | --- | ---
Disclosure of classes of share capital [abstract] |  |  |
Number of shares | 0.8 | 1.1 | 0.9
Carrying value | $ 35.0 | $ 37.0 | $ 21.7
Market value | $ 73.6 | $ 62.8 | $ 57.3

X
- References No definition available. + Details
Name: | ifrs-full_DisclosureOfClassesOfShareCapitalAbstract
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of shares held by employee share trust. + References No definition available. + Details
Name: | ihg_NumberOfSharesHeldByEmployeeShareTrust
Namespace Prefix: | ihg_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition Shares held in employee trust , carrying value. + References No definition available. + Details
Name: | ihg_SharesHeldInEmployeeTrustCarryingValue
Namespace Prefix: | ihg_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Shares held in employee trust , market value. + References No definition available. + Details
Name: | ihg_SharesHeldInEmployeeTrustMarketValue
Namespace Prefix: | ihg_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant