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Trade and other receivables - Summary of Maximum Exposure to Credit Risk for Trade and Other Receivables Excluding Prepayments by Geographic Region (Detail) - USD ($) $ in Millions | Dec. 31, 2023 | Dec. 31, 2022
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Disclosure of trade and other receivables [line items] |  |
Maximum exposure to credit risk | $ 657 | $ 545
Americas [member] |  |
Disclosure of trade and other receivables [line items] |  |
Maximum exposure to credit risk | 359 | 321
EMEAA [member] |  |
Disclosure of trade and other receivables [line items] |  |
Maximum exposure to credit risk | 199 | 152
Greater China [member] |  |
Disclosure of trade and other receivables [line items] |  |
Maximum exposure to credit risk | $ 99 | $ 72

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- Definition The amount that best represents the maximum exposure to credit risk without taking into account any collateral held or other credit enhancements (for example, netting agreements that do not qualify for offset in accordance with IAS 32). [Refer: Credit risk [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2023-01-01 -Paragraph 35K -Subparagraph a -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2023-en-r&anchor=para_35K_a&doctype=Standard -URIDate 2023-03-23 + Details
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Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | instant

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- Definition Disclosure of trade and other receivables. + References No definition available. + Details
Name: | ihg_DisclosureOfTradeAndOtherReceivablesLineItems
Namespace Prefix: | ihg_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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

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

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