XML 371 R98.htm IDEA: XBRL DOCUMENT
v3.22.0.1

Auditor's remuneration - Summary of Auditor's Remuneration Paid (Parenthetical) (Detail) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2020 USD ($)
Auditor's remuneration [abstract] |
Audit fee not yet incurred | $ 0.2

X
- References No definition available. + Details
Name: | ifrs-full_AuditorsRemunerationAbstract
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Audit fee not yet incurred. + References No definition available. + Details
Name: | ihg_AuditFeeNotYetIncurred
Namespace Prefix: | ihg_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration