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v3.19.3.a.u2

Revenue - Additional Information (Detail) - USD ($) $ in Millions | Dec. 31, 2019 | Dec. 31, 2018
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Disclosure of disaggregation of revenue from contracts with customers [line items] |  |
Maximum payout remaining guarantees | $ 85 | $ 42
Performance Guarantees [member] |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |
Performance guarantees included within trade and other payables | $ 2 | $ 3

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- 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
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Balance Type: | na
Period Type: | duration

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- Definition The amount of trade payables and other payables. [Refer: Trade payables; Other payables] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2019-01-01 -Paragraph 54 -Subparagraph k -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2019-en-r&anchor=para_54_k&doctype=Standard -URIDate 2019-03-27 + Details
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Balance Type: | credit
Period Type: | instant

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- Definition Maximum payout remaining guarantees. + References No definition available. + Details
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Namespace Prefix: | ihg_
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Balance Type: | credit
Period Type: | instant

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |