v3.25.2
Segment reporting - Summarized financial information (Details)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2025
USD ($)
Jun. 30, 2024
USD ($)
Jun. 30, 2025
USD ($)
segment
Jun. 30, 2024
USD ($)
Disclosure of operating segments [line items]        
Number of operating segments | segment     3  
Revenues from external customers $ 433.3 $ 435.4 $ 872.9 $ 853.1
Segment Adjusted EBITDA 277.3 287.2 563.7 499.7
Elimination of intersegment amounts        
Disclosure of operating segments [line items]        
Revenues from external customers     0.0  
Nigeria        
Disclosure of operating segments [line items]        
Revenues from external customers 260.4 269.6 531.7 497.3
Segment Adjusted EBITDA 170.7 171.4 349.8 274.3
SSA        
Disclosure of operating segments [line items]        
Revenues from external customers 127.8 108.2 248.6 239.5
Segment Adjusted EBITDA 73.1 76.4 144.8 146.1
Latam        
Disclosure of operating segments [line items]        
Revenues from external customers 45.1 46.5 92.6 94.3
Segment Adjusted EBITDA $ 33.5 33.3 $ 69.1 67.1
MENA        
Disclosure of operating segments [line items]        
Revenues from external customers   11.1   22.0
Segment Adjusted EBITDA   $ 6.1   $ 12.2