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Leases - Disclosure of quantitative information about right-of-use assets (Detail) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Cost |  |  |
Beginning balance | $ 610 | $ 621 |
Additions and other re-measurements | 40 | 4 |
Transfers to investment property | 0 |  |
Transfers to finance lease receivable | (5) |  |
Terminations | (10) |  |
Terminations and disposals |  | (10) |
Exchange and other adjustments | (12) | (5) |
Ending balance | 623 | 610 | $ 621
Depreciation and impairment |  |  |
Beginning balance | (336) | (318) |
Provided | (25) | (27) |
System Fund expense | (3) | (3) | (4)
Impairment Charge | (2) |  |
Impairment reversal | 2 |  |
Transfers to investment property | 0 |  |
Transfers to finance lease receivable | 3 |  |
System Fund impairment reversal |  | 3 |
Terminations | 10 |  |
Terminations and disposals |  | 6 |
Exchange and other adjustments | 8 | 3 |
Ending balance | (343) | (336) | (318)
Net book value |  |  |
Right-of-use assets net | 280 | 274 | 303
Land and buildings [member] |  |  |
Cost |  |  |
Beginning balance | 607 | 617 |
Additions and other re-measurements | 40 | 4 |
Transfers to investment property | (50) |  |
Transfers to finance lease receivable | (5) |  |
Terminations | (9) |  |
Terminations and disposals |  | (9) |
Exchange and other adjustments | (12) | (5) |
Ending balance | 571 | 607 | 617
Depreciation and impairment |  |  |
Beginning balance | (334) | (316) |
Provided | (24) | (26) |
System Fund expense | (3) | (3) |
Impairment Charge | (2) |  |
Impairment reversal | 2 |  |
Transfers to investment property | 47 |  |
Transfers to finance lease receivable | 3 |  |
System Fund impairment reversal |  | 3 |
Terminations | 9 |  |
Terminations and disposals |  | 5 |
Exchange and other adjustments | 8 | 3 |
Ending balance | (294) | (334) | (316)
Net book value |  |  |
Right-of-use assets net | 277 | 273 | 301
Investment property [member] |  |  |
Cost |  |  |
Transfers to investment property | 50 |  |
Ending balance | 50 |  |
Depreciation and impairment |  |  |
Transfers to investment property | (47) |  |
Ending balance | (47) |  |
Net book value |  |  |
Right-of-use assets net | 3 |  |
Other [member] |  |  |
Cost |  |  |
Beginning balance | 3 | 4 |
Terminations | (1) |  |
Terminations and disposals |  | (1) |
Ending balance | 2 | 3 | 4
Depreciation and impairment |  |  |
Beginning balance | (2) | (2) |
Provided | (1) | (1) |
Terminations | 1 |  |
Terminations and disposals |  | 1 |
Ending balance | $ (2) | (2) | (2)
Net book value |  |  |
Right-of-use assets net |  | $ 1 | $ 2

X
- Definition The amount of assets that represent a lessee's right to use an underlying asset for the lease term. Underlying asset is an asset that is the subject of a lease, for which the right to use that asset has been provided by a lessor to a lessee. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 16 -IssueDate 2022-03-24 -Paragraph 53 -Subparagraph j -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=16&code=ifrs-tx-2022-en-r&anchor=para_53_j&doctype=Standard -URIDate 2022-03-24 + Details
Name: | ifrs-full_RightofuseAssets
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition Additions and other remeasurements right of use assets. + References No definition available. + Details
Name: | ihg_AdditionsAndOtherRemeasurementsRightOfUseAssets
Namespace Prefix: | ihg_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Depreciation right of use assets charged to the system fund. + References No definition available. + Details
Name: | ihg_DepreciationRightOfUseAssetsChargedToTheSystemFund
Namespace Prefix: | ihg_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Exchange and other adjustments right of use assets at cost operating leases. + References No definition available. + Details
Name: | ihg_ExchangeAndOtherAdjustmentsRightOfUseAssetsAtCostOperatingLeases
Namespace Prefix: | ihg_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Exchange and other adjustments right of use assets operating leases accumulated depreciation and impairment. + References No definition available. + Details
Name: | ihg_ExchangeAndOtherAdjustmentsRightOfUseAssetsOperatingLeasesAccumulatedDepreciationAndImpairment
Namespace Prefix: | ihg_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Impairment Charge Reversal Right of Use Assets + References No definition available. + Details
Name: | ihg_ImpairmentChargeReversalRightOfUseAssets
Namespace Prefix: | ihg_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Impairment charge reversal right of use assets explanatory. + References No definition available. + Details
Name: | ihg_ImpairmentChargeReversalRightOfUseAssetsExplanatory
Namespace Prefix: | ihg_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Impairment charges. + References No definition available. + Details
Name: | ihg_ImpairmentCharges
Namespace Prefix: | ihg_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Lease assets cost. + References No definition available. + Details
Name: | ihg_LeaseAssetsCostAbstract
Namespace Prefix: | ihg_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Lease right of use assets accumulated depreciation and impairment. + References No definition available. + Details
Name: | ihg_LeaseRightOfUseAssetsAccumulatedDepreciationAndImpairment
Namespace Prefix: | ihg_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Lease right of use assets accumulated depreciation and impairment terminations. + References No definition available. + Details
Name: | ihg_LeaseRightOfUseAssetsAccumulatedDepreciationAndImpairmentTerminations
Namespace Prefix: | ihg_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Lease Right Of Use Assets Depreciation And Impairment + References No definition available. + Details
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Namespace Prefix: | ihg_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Lease right of use assets depreciation and impairment during the period. + References No definition available. + Details
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Namespace Prefix: | ihg_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Lease of right of use assets cost. + References No definition available. + Details
Name: | ihg_LeaseofRightofuseAssetsCost
Namespace Prefix: | ihg_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition Right Of Use AssetsBok Value + References No definition available. + Details
Name: | ihg_RightOfUseAssetsbokValueAbstract
Namespace Prefix: | ihg_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Termination and disposals of right of use assets. + References No definition available. + Details
Name: | ihg_TerminationAndDisposalsOfRightOfUseAssets
Namespace Prefix: | ihg_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Termination and disposals of right of use assets depreciation and impairment. + References No definition available. + Details
Name: | ihg_TerminationAndDisposalsOfRightToUseAssetsDepreciationAndImpairment
Namespace Prefix: | ihg_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Termination of right of use assets,leases. + References No definition available. + Details
Name: | ihg_TerminationOfRightOfUseAssetsleasescost
Namespace Prefix: | ihg_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Transfers to finance lease receivable. + References No definition available. + Details
Name: | ihg_TransfersToFinanceLeaseReceivable
Namespace Prefix: | ihg_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Transfers to finance lease receivable depreciation and impairment. + References No definition available. + Details
Name: | ihg_TransfersToFinanceLeaseReceivableDepreciationAndImpairment
Namespace Prefix: | ihg_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Transfers to investment property. + References No definition available. + Details
Name: | ihg_TransfersToInvestmentProperty
Namespace Prefix: | ihg_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Transfers to investment property right of use asset. + References No definition available. + Details
Name: | ihg_TransfersToInvestmentPropertyRightOfUseAsset
Namespace Prefix: | ihg_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
Name: | ifrs-full_PropertyPlantAndEquipmentByOperatingLeaseStatusAxis=ifrs-full_LandAndBuildingsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | ifrs-full_PropertyPlantAndEquipmentByOperatingLeaseStatusAxis=ifrs-full_PropertyPlantAndEquipmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | ifrs-full_PropertyPlantAndEquipmentByOperatingLeaseStatusAxis=ifrs-full_OtherAssetsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |