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Trade and other receivables - Additional Information (Detail) | 12 Months Ended
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Dec. 31, 2017
Trade and other receivables [abstract] |
Non-interest-bearing trade receivables, payment terms | 30 days

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

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- Definition Trade receivables payment terms. + References No definition available. + Details
Name: | ihg_TradeReceivablesPaymentTerms
Namespace Prefix: | ihg_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration