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Cover Page
 12 Months Ended
Dec. 31, 2025
shares
Document Information [Line Items]  
Document Type 20-F
Document Registration Statement false
Document Annual Report true
Document Period End Date Dec. 31, 2025
Current Fiscal Year End Date --12-31
Document Transition Report false
Document Shell Company Report false
Entity File Number 1-10409
Entity Registrant Name InterContinental Hotels Group PLC
Entity Address, Country GB
Entity Incorporation, State or Country Code X0
Entity Address, Address Line One 1 Windsor Dials
Entity Address, Address Line Two Arthur Road
Entity Address, City or Town Windsor
Entity Address, Postal Zip Code SL4 1RS
Entity Common Stock, Shares Outstanding 164,711,854
Entity Well-known Seasoned Issuer Yes
Entity Voluntary Filers No
Entity Current Reporting Status Yes
Entity Interactive Data Current Yes
Entity Filer Category Large Accelerated Filer
Entity Emerging Growth Company false
ICFR Auditor Attestation Flag true
Document Financial Statement Error Correction [Flag] false
Document Accounting Standard International Financial Reporting Standards
Entity Shell Company false
Document Fiscal Year Focus 2025
Entity Central Index Key 0000858446
Amendment Flag false
Document Fiscal Period Focus FY
Business Contact  
Document Information [Line Items]  
Entity Address, Country GB
Entity Address, Address Line One 1 Windsor Dials
Entity Address, Address Line Two Arthur Road
Entity Address, City or Town Windsor
Entity Address, Postal Zip Code SL4 1RS
Contact Personnel Name Nicolette Henfrey
City Area Code +44
Local Phone Number (0)1753 972000
Contact Personnel Email Address companysecretariat@ihg.com
American Depositary Shares  
Document Information [Line Items]  
Title of 12(b) Security American Depositary Shares
Trading Symbol IHG
Security Exchange Name NYSE
Ordinary Shares  
Document Information [Line Items]  
Title of 12(b) Security Ordinary Shares of 20 340 ⁄ 399 pence each
Trading Symbol IHG
Security Exchange Name NYSE