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Finance Costs - Additional Information (Detail) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Disclosure Of Detailed Finance (Income) Costs Explanatory [line items] |  |  |
Rate used for capitalisation of interest | 3.10% | 3.00% | 3.00%
IHG Rewards club loyalty programme [member] |  |  |
Disclosure Of Detailed Finance (Income) Costs Explanatory [line items] |  |  |
Interest payable to IHG rewards club | $ 13 | $ 14 | $ 7

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- Definition The weighted average of interest and other costs that an entity incurs in connection with the borrowing of funds applicable to the borrowings of the entity that are outstanding during the period, other than borrowings made specifically for the purpose of obtaining a qualifying asset. [Refer: Weighted average [member]; Borrowings] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 23 -IssueDate 2019-01-01 -Paragraph 26 -Subparagraph b -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=23&code=ifrs-tx-2019-en-r&anchor=para_26_b&doctype=Standard -URIDate 2019-03-27 + Details
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- Definition Disclosure Of Detailed Finance (Income) Costs Explanatory [line items] + References No definition available. + Details
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Namespace Prefix: | ihg_
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Balance Type: | na
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- Definition Interest payable to IHG rewards club. + References No definition available. + Details
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Period Type: | duration

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