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Trade and other payables - Additional Information (Detail) - USD ($) $ in Millions | Dec. 31, 2023 | Dec. 31, 2022
--- | --- | ---
Statement [Line Items] |  |
Share repurchase outstanding amount |  | $ 29
Unavoidable contractual cost of shares to be repurchased |  | 20
Performance fee |  | 11
Special allocation of expense |  | 18
Guarantees of loans made to equity accounted investments | $ 50 | 50
Guarantees of loans made to equity accounted investments gross | 0 | 0
Top of range [member] |  |
Statement [Line Items] |  |
Guarantees of loans made to equity accounted investments | $ 21 | 21
Current accruals [member] |  |
Statement [Line Items] |  |
Share repurchase outstanding amount |  | $ 2

X
- Definition The amount of guarantees of loans made to equity accounted investments. + References No definition available. + Details
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Data Type: | xbrli:monetaryItemType
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Period Type: | instant

X
- Definition Guarantees of loans made to equity accounted investments gross. + References No definition available. + Details
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Namespace Prefix: | ihg_
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- Definition Performance fee. + References No definition available. + Details
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Data Type: | xbrli:monetaryItemType
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Period Type: | instant

X
- Definition Share repurchase outstanding amount. + References No definition available. + Details
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Namespace Prefix: | ihg_
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Period Type: | instant

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- Definition Special allocation of expense. + References No definition available. + Details
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Period Type: | instant

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- Definition Uunavoidable contractual cost of shares to be repurchased. + References No definition available. + Details
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Data Type: | xbrli:monetaryItemType
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- Details
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Namespace Prefix: |
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Balance Type: |
Period Type: |

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |