XML 452 R180.htm IDEA: XBRL DOCUMENT
v3.24.0.1

Retirement benefits - Summary of Principal Financial Assumptions Used to Determine Benefit Obligations (Detail) | Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
--- | --- | --- | ---
United Kingdom [member] |  |  |
Disclosure of defined benefit plan actuarial assumptions [line items] |  |  |
Pension increases | 3.10% | 3.20% | 3.40%
Inflation rate | 3.10% | 3.20% | 3.40%
Discount rate | 4.80% | 5.00% | 1.80%
United States [member] |  |  |
Disclosure of defined benefit plan actuarial assumptions [line items] |  |  |
Discount rate | 4.70% | 4.90% | 2.40%
Ultimate rate that the cost trend rate trends to | 4.50% | 4.50% | 4.50%
United States [member] | Pre 65 [member] |  |  |
Disclosure of defined benefit plan actuarial assumptions [line items] |  |  |
Healthcare cost trend rate | 7.80% | 6.90% | 6.20%
United States [member] | Post 65 [member] |  |  |
Disclosure of defined benefit plan actuarial assumptions [line items] |  |  |
Healthcare cost trend rate | 8.60% | 7.30% | 6.50%
US post-retirement plan [member] |  |  |
Disclosure of defined benefit plan actuarial assumptions [line items] |  |  |
Discount rate | 4.70% | 4.90% | 2.40%

X
- Definition The discount rate used as the significant actuarial assumption to determine the present value of a defined benefit obligation. [Refer: Defined benefit obligation, at present value; Actuarial assumptions [member]] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 19 -IssueDate 2023-01-01 -Paragraph 144 -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=19&code=ifrs-tx-2023-en-r&anchor=para_144&doctype=Standard -URIDate 2023-03-23 + Details
Name: | ifrs-full_ActuarialAssumptionOfDiscountRates
Namespace Prefix: | ifrs-full_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition The expected rate of inflation that is used as a significant actuarial assumption to determine the present value of a defined benefit obligation. [Refer: Defined benefit plans [member]; Defined benefit obligation, at present value; Actuarial assumptions [member]] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 19 -IssueDate 2023-01-01 -Paragraph 144 -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=19&code=ifrs-tx-2023-en-r&anchor=para_144&doctype=Standard -URIDate 2023-03-23 + Details
Name: | ifrs-full_ActuarialAssumptionOfExpectedRatesOfInflation
Namespace Prefix: | ifrs-full_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition The expected rate of increases in pension that is used as a significant actuarial assumption to determine the present value of a defined benefit obligation. [Refer: Defined benefit plans [member]; Defined benefit obligation, at present value; Actuarial assumptions [member]] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 19 -IssueDate 2023-01-01 -Paragraph 144 -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=19&code=ifrs-tx-2023-en-r&anchor=para_144&doctype=Standard -URIDate 2023-03-23 + Details
Name: | ifrs-full_ActuarialAssumptionOfExpectedRatesOfPensionIncreases
Namespace Prefix: | ifrs-full_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Medical cost trend rate used as significant actuarial assumption to determine the present value of a defined benefit obligation. [Refer: Defined benefit obligation, at present value; Actuarial assumptions [member]] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 19 -IssueDate 2023-01-01 -Paragraph 144 -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=19&code=ifrs-tx-2023-en-r&anchor=para_144&doctype=Standard -URIDate 2023-03-23 + Details
Name: | ifrs-full_ActuarialAssumptionOfMedicalCostTrendRates
Namespace Prefix: | ifrs-full_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Disclosure Of Defined Benefit Plan Actuarial Assumptions [line items]. + References No definition available. + Details
Name: | ihg_DisclosureOfDefinedBenefitPlanActuarialAssumptionsLineItems
Namespace Prefix: | ihg_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Ultimate rate that the cost trend rate trends to. + References No definition available. + Details
Name: | ihg_UltimateRateThatTheCostTrendRateTrendsTo
Namespace Prefix: | ihg_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | ifrs-full_GeographicalAreasAxis=country_GB
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_GeographicalAreasAxis=country_US
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_CategoriesOfAssetsRecognisedFromCostsToObtainOrFulfilContractsWithCustomersAxis=ihg_PreSixtyFiveMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_CategoriesOfAssetsRecognisedFromCostsToObtainOrFulfilContractsWithCustomersAxis=ihg_PostSixtyFiveMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_DefinedBenefitPlansAxis=ihg_PostEmploymentBenefitsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |