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Capital commitments and contingent liabilities (Details) - USD ($) $ in Millions	Sep. 30, 2025	Dec. 31, 2024
Capital commitments and contingent liabilities.
Commitments to purchase property, plant and equipment	$ 108.8	$ 98.9

X

- Definition

The amount of contractual commitments for the acquisition of property, plant and equipment. [Refer: Property, plant and equipment]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 16
-IssueDate 2024-01-01
-Paragraph 74
-Subparagraph c
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=16&code=ifrs-tx-2024-en-r&anchor=para_74_c&doctype=Standard
-URIDate 2024-03-27

+ Details

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

X

- Definition

No definition available

+ References

No definition available.

+ Details

Name:	ihs_CapitalCommitmentsAndContingentLiabilitiesAbstract
Namespace Prefix:	ihs_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration