Trade and other receivables - Summary of Movement in Allowance for Expected Lifetime Credit Losses of Trade and Other Receivables (Detail) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2022	Dec. 31, 2021
Trade and other receivables [abstract]
At 1 January	$ (133)	$ (78)
Fully provided receivables reinstated		(60)
Reclassification To Other Receivable	9
Impairment loss	(5)	(4)
System Fund impairment (loss)/reversal	(7)	6
Amounts written off	17	8
Exchange and other adjustments	2	(5)
At 31 December	$ (117)	$ (133)

The amount of an allowance account used to record impairments to financial assets due to credit losses. [Refer: Financial assets]

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Note Expiry date 2023-01-01
-Name IFRS
-Number 7
-IssueDate 2022-03-24
-Paragraph 16
-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2017-en-b&anchor=para_16&doctype=Standard&book=b
-URIDate 2022-03-24

+ Details

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Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The amount of impairment loss recognised in profit or loss for trade receivables. [Refer: Impairment loss recognised in profit or loss; Trade receivables]

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 1
-IssueDate 2022-03-24
-Paragraph 112
-Subparagraph c
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2022-en-r&anchor=para_112_c&doctype=Standard
-URIDate 2022-03-24

+ Details

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Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- References

No definition available.

+ Details

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Namespace Prefix:	ifrs-full_
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Balance Type:	na
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- Definition

The decrease in an allowance account for credit losses of financial assets resulting from the utilisation of the allowance. [Refer: Allowance account for credit losses of financial assets]

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Note Expiry date 2023-01-01
-Name IFRS
-Number 7
-IssueDate 2022-03-24
-Paragraph 16
-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2017-en-b&anchor=para_16&doctype=Standard&book=b
-URIDate 2022-03-24

+ Details

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Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Fully provided receivebles reinstated.

+ References

No definition available.

+ Details

Name:	ihg_FullyProvidedReceiveblesReinstated
Namespace Prefix:	ihg_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Increase Decrease Through Net Exchange Differences And Other Adjustments Allowance Account For Credit Losses Of FinancialAssets

+ References

No definition available.

+ Details

Name:	ihg_IncreaseDecreaseThroughNetExchangeDifferencesAndOtherAdjustmentsAllowanceAccountForCreditLossesOfFinancialassets
Namespace Prefix:	ihg_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Reclassification to other receivable.

+ References

No definition available.

+ Details

Name:	ihg_ReclassificationToOtherReceivable
Namespace Prefix:	ihg_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

System fund impairment loss on trade receivables.

+ References

No definition available.

+ Details

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Namespace Prefix:	ihg_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration