v3.26.1
Segment reporting - Summarized financial information (Details) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Geographical information    
Revenues from external customers $ 415.4 $ 392.1 [1]
Discontinued operations    
Geographical information    
Revenues from external customers 51.8 47.5
Aggregate continuing and discontinuing operations    
Geographical information    
Segment Adjusted EBITDA 297.8 286.5
Nigeria    
Geographical information    
Revenues from external customers 285.0 271.4
Nigeria | Aggregate continuing and discontinuing operations    
Geographical information    
Revenues from external customers 285.0 271.4
Segment Adjusted EBITDA 182.6 179.2
SSA    
Geographical information    
Revenues from external customers 130.4 120.7
SSA | Aggregate continuing and discontinuing operations    
Geographical information    
Revenues from external customers 130.4 120.7
Segment Adjusted EBITDA 77.6 71.7
Latam | Discontinued operations    
Geographical information    
Revenues from external customers 51.8 47.5
Latam | Aggregate continuing and discontinuing operations    
Geographical information    
Revenues from external customers 51.8 47.5
Segment Adjusted EBITDA $ 37.6 $ 35.6
[1] The results for the three months ended March 31, 2025 have been re-presented to reflect that the results of the Latam segment are now reported as a discontinued operation. See note 20.1 for more information.