v3.26.1
Events after the reporting period (Details)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2026
USD ($)
Jun. 30, 2025
USD ($)
Jun. 30, 2026
USD ($)
Jun. 30, 2025
USD ($)
Aug. 10, 2026
site
Feb. 11, 2026
Disclosure of non-adjusting events after reporting period [line items]            
Profit (loss) from discontinued operations $ 7.6 $ (20.2) [1] $ 17.5 $ (36.5) [1]    
Discontinued operations            
Disclosure of non-adjusting events after reporting period [line items]            
Profit (loss) from discontinued operations $ 7.6 $ (20.2) $ 17.5 $ (36.5)    
I-Systems Solues de Infraestrutura S.A.            
Disclosure of non-adjusting events after reporting period [line items]            
Agreed to sell equity interest           51.00%
Disposal of major subsidiary | IHS Latam Group            
Disclosure of non-adjusting events after reporting period [line items]            
Number of tower sites disposed | site         9,000  
[1] The results for the three and six months ended June 30, 2025 have been re-presented to reflect that the results of the Latam segment is now reported as a discontinued operation. See note 21.1 for more information