Significant accounting policies (Details)	9 Months Ended
Sep. 30, 2022 segment
Disclosure of detailed information about property, plant and equipment [line items]
Number of reportable segments	4

Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements.

No definition available.

Name:	ihs_IfrsNumberOfReportableSegments
Namespace Prefix:	ihs_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration