XML 157 R150.htm IDEA: XBRL DOCUMENT
v3.8.0.1

Financial risk management - Summary of Interest and Foreign Exchange Risk Sensitivities (Detail) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Impact on profit before tax [member] | Currency risk [member] | Sterling US dollar exchange rate [member] |  |  |
Disclosure of detailed information about financial instruments [Line Items] |  |  |
Impact of 5 cent fall in exchange rate | $ 4.0 | $ 5.2 | $ 4.8
Impact on profit before tax [member] | Currency risk [member] | Euro US dollar exchange rate [member] |  |  |
Disclosure of detailed information about financial instruments [Line Items] |  |  |
Impact of 5 cent fall in exchange rate | (2.1) | (2.2) | (1.9)
Impact on profit before tax [member] | Interest rate risk [member] | US dollar interest rates [member] |  |  |
Disclosure of detailed information about financial instruments [Line Items] |  |  |
Impact of 1% increase interest rates | (2.9) | (1.8) | (0.9)
Impact on profit before tax [member] | Interest rate risk [member] | Sterling interest rates [member] |  |  |
Disclosure of detailed information about financial instruments [Line Items] |  |  |
Impact of 1% increase interest rates | 0.3 | 1.3 | 7.9
Impact on net liabilities [member] | Currency risk [member] | Sterling US dollar exchange rate [member] |  |  |
Disclosure of detailed information about financial instruments [Line Items] |  |  |
Impact of 5 cent fall in exchange rate | 44.1 | 47.2 | 23.7
Impact on net liabilities [member] | Currency risk [member] | Euro US dollar exchange rate [member] |  |  |
Disclosure of detailed information about financial instruments [Line Items] |  |  |
Impact of 5 cent fall in exchange rate | $ (4.1) | $ (5.5) | $ (7.6)

X
- Definition Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes of the table. + References No definition available. + Details
Name: | ifrs-full_DisclosureOfFinancialInstrumentsLineItems
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The amount of exchange differences recognised in profit or loss that arise from foreign currency transactions, excluding those arising on financial instruments measured at fair value through profit or loss in accordance with IFRS 9. [Refer: At fair value [member]; Financial instruments, class [member]] + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Name IAS -Number 7 -IssueDate 2017-01-01 -Section A Statement of cash flows for an entity other than a financial institution -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=7&date=2017-03-01&anchor=sect_AStatementofcashflowsforanentityotherthanafinancialinstitution&doctype=Illustrative%20Examples -URIDate 2017-03-09 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 21 -IssueDate 2017-01-01 -Paragraph 52 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=21&date=2017-03-01&anchor=para_52_a&doctype=Standard -URIDate 2017-03-09 + Details
Name: | ifrs-full_GainsLossesOnExchangeDifferencesOnTranslationRecognisedInProfitOrLoss
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Gains (losses) on currency and interest rate derivatives not qualifying for hedge accounting tax, before tax. + References No definition available. + Details
Name: | ihg_GainsLossesOnCurrencyAndInterestRateDerivativesNotQualifyingForHedgeAccountingTaxBeforeTax
Namespace Prefix: | ihg_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Gains losses on exchange differences on translation recognised in net assets. + References No definition available. + Details
Name: | ihg_GainsLossesOnExchangeDifferencesOnTranslationRecognisedInNetAssets
Namespace Prefix: | ihg_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
Name: | ifrs-full_MeasurementAxis=ihg_ImpactOnProfitBeforeTaxMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_TypesOfRisksAxis=ifrs-full_CurrencyRiskMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_HedgedItemsAxis=ihg_SterlingUSDollarExchangeRateMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_HedgedItemsAxis=ihg_EuroUSDollarExchangeRateMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_TypesOfRisksAxis=ifrs-full_InterestRateRiskMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_HedgedItemsAxis=ihg_USDollarInterestRatesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_HedgedItemsAxis=ihg_SterlingInterestRatesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_MeasurementAxis=ihg_ImpactOnNetLiabilitiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |