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Trade and Other Receivables - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2018
Trade and other receivables [abstract]
Non-interest-bearing trade receivables, payment terms	30 days

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- References

No definition available.

+ Details

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Namespace Prefix:	ifrs-full_
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Period Type:	duration

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- Definition

Trade receivables payment terms.

+ References

No definition available.

+ Details

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Namespace Prefix:	ihg_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration