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Provisions - Additional Information (Detail) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2016 USD ($)
Disclosure Of Litigation Settlement [Abstract] |
Litigation expenses | $ 12
Insurance recovery of litigation expenses | $ 8

X
- Definition The amount used (ie incurrent and charged against the provision) for other provisions. [Refer: Other provisions] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 37 -IssueDate 2017-01-01 -Paragraph 84 -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=37&date=2017-03-01&anchor=para_84_c&doctype=Standard -URIDate 2017-03-09 + Details
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Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Disclosure of litigation settlement. + References No definition available. + Details
Name: | ihg_DisclosureOfLitigationSettlementAbstract
Namespace Prefix: | ihg_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Insurance recovery of litigation expenses. + References No definition available. + Details
Name: | ihg_InsuranceRecoveryOfLitigationExpenses
Namespace Prefix: | ihg_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration