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Earnings/(loss) per ordinary share - Additional Information (Detail) $ in Millions	Aug. 09, 2022 USD ($)
Earnings per share [abstract]
Share buyback	$ 500

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- References

No definition available.

+ Details

Name:	ifrs-full_EarningsPerShareAbstract
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

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- Definition

Share buyback.

+ References

No definition available.

+ Details

Name:	ihg_ShareBuyback
Namespace Prefix:	ihg_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant