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Finance Income (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Finance income
Net foreign exchange gain arising from financing - unrealized	$ 77.6		$ 107.9
Change in fair value of embedded options	30.6	$ 19.0	34.9	$ 29.6
Interest income - bank deposits	11.1	5.0	31.7	12.9
Change in fair value of foreign exchange swaps	10.2	1.3	10.4	7.0
Other interest income	0.7		1.4
Net foreign exchange gain arising from financing - realized		0.4
Change in fair value of interest rate caps				0.2
Total Finance income	$ 130.2	$ 25.7	$ 186.3	$ 49.7

X

- Definition

The amount of income associated with interest and other financing activities of the entity.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 1
-IssueDate 2024-01-01
-Paragraph 85
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_85&doctype=Standard
-URIDate 2024-03-27

+ Details

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Period Type:	duration

X

- Definition

The amount of interest income on deposits. [Refer: Interest income]

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 1
-IssueDate 2024-01-01
-Paragraph 112
-Subparagraph c
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_112_c&doctype=Standard
-URIDate 2024-03-27

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X

- Definition

The amount of fair value gain on embedded options.

+ References

No definition available.

+ Details

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X

- Definition

Fair value gain on interest rate caps

+ References

No definition available.

+ Details

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X

- Definition

Fair value gains (losses) on foreign exchange swaps

+ References

No definition available.

+ Details

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X

- Definition

n/a

+ References

No definition available.

+ Details

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Balance Type:	na
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X

- Definition

The amount of foreign currency transaction realized gain (loss) from financing, recognized in the income statement.

+ References

No definition available.

+ Details

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X

- Definition

The amount of foreign currency transaction unrealized gain (loss) from financing, recognized in the income statement.

+ References

No definition available.

+ Details

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Namespace Prefix:	ihs_
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X

- Definition

Other interest income.

+ References

No definition available.

+ Details

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