XML 434 R192.htm IDEA: XBRL DOCUMENT
v3.10.0.1

Share-based payments - Additional Information (Detail) £ / shares in Units, $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2018 USD ($) award shares | Dec. 31, 2018 GBP (£) award £ / shares shares | Dec. 31, 2017 USD ($) award shares | Dec. 31, 2017 GBP (£) award shares | Dec. 31, 2016 USD ($) award shares
Disclosure of terms and conditions of share-based payment arrangement [Line Items] |  |  |  |  |
Share based payment cost | $ | $ 27 |  | $ 21 |  | $ 17
Weighted average share price at exercise date | £ |  | £ 45.838 |  | £ 38.047 |
System Fund [member] |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [Line Items] |  |  |  |  |
Share based payment cost | $ | 11 |  | 6 |  | 6
Administrative expenses [member] | Exceptional items [member] |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [Line Items] |  |  |  |  |
Share based payment cost | $ | $ 1 |  | $ 2 |  | $ 0
Maximum [member] |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [Line Items] |  |  |  |  |
IHG share price | £ / shares |  | £ 49.66 |  |  |
Minimum [member] |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [Line Items] |  |  |  |  |
IHG share price | £ / shares |  | 39.48 |  |  |
Closing [member] |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [Line Items] |  |  |  |  |
IHG share price | £ / shares |  | £ 42.37 |  |  |
Annual Performance Plan [member] |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [Line Items] |  |  |  |  |
Number of shares awarded to employees | 176,000 | 176,000 | 235,000 | 235,000 | 336,000
Annual Performance Plan one-off awards | shares | 48,771 | 48,771 | 79,471 | 79,471 | 103,071
Long Term Incentive Plan [member] |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [Line Items] |  |  |  |  |
Number of shares awarded to employees | 784,119 | 784,119 | 805,045 | 805,045 | 1,355,721
Vesting period of share awards | 3 years | 3 years |  |  |
LTIP Restricted stock units [member] |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [Line Items] |  |  |  |  |
Number of shares awarded to employees | 527,000 | 527,000 | 525,000 | 525,000 | 467,000
LTIP Performance-related awards [member] |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [Line Items] |  |  |  |  |
Number of shares awarded to employees | 257,000 | 257,000 | 280,000 | 280,000 | 889,000

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_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The amount of expense from share-based payment transactions with employees. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2018-01-01 -Paragraph 112 -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2018-03-01&anchor=para_112_c&doctype=Standard -URIDate 2018-03-16 + Details
Name: | ifrs-full_ExpenseFromSharebasedPaymentTransactionsWithEmployees
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The number of other equity instruments (ie other than share options) granted in a share-based payment arrangement. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 2 -IssueDate 2018-01-01 -Paragraph 47 -Subparagraph b -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=2&date=2018-03-01&anchor=para_47_b&doctype=Standard -URIDate 2018-03-16 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Name IFRS -Number 2 -IssueDate 2018-01-01 -Paragraph 45 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=2&date=2018-03-01&anchor=para_45&doctype=Standard -URIDate 2018-03-16 + Details
Name: | ifrs-full_NumberOfInstrumentsOtherEquityInstrumentsGranted
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:decimalItemType
Balance Type: | na
Period Type: | duration

X
- Definition The weighted average exercise price of other equity instruments (ie other than share options) exercised or vested in a share-based payment arrangement. [Refer: Weighted average [member]] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IFRS -Number 2 -IssueDate 2018-01-01 -Paragraph 45 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=2&date=2018-03-01&anchor=para_45&doctype=Standard -URIDate 2018-03-16 + Details
Name: | ifrs-full_WeightedAverageExercisePriceOfOtherEquityInstrumentsExercisedOrVestedInSharebasedPaymentArrangement
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of one off share awards granted. + References No definition available. + Details
Name: | ihg_NumberOfOneOffShareAwardsGranted
Namespace Prefix: | ihg_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Price Per Share + References No definition available. + Details
Name: | ihg_PricePerShare
Namespace Prefix: | ihg_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | duration

X
- Definition Vesting period of share awards + References No definition available. + Details
Name: | ihg_VestingPeriodOfShareAwards
Namespace Prefix: | ihg_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | ifrs-full_ProductsAndServicesAxis=ihg_SystemFundMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ihg_ExpenseCategoriesAxis=ihg_AdministrativeExpensesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ConsolidatedAndSeparateFinancialStatementsAxis=ihg_ExceptionalItemsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_RangeAxis=ifrs-full_TopOfRangeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_RangeAxis=ifrs-full_BottomOfRangeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_RangeAxis=ihg_ClosingMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_TypesOfSharebasedPaymentArrangementsAxis=ihg_AnnualPerformancePlanMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_TypesOfSharebasedPaymentArrangementsAxis=ihg_LongtermIncentivePlanMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_TypesOfSharebasedPaymentArrangementsAxis=ihg_RestrictedStockUnitsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_TypesOfSharebasedPaymentArrangementsAxis=ihg_PerformanceShareAwardsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |