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Segment reporting - Summarized segment assets and liabilities and additions (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2024
Sep. 30, 2023
Sep. 30, 2024
Sep. 30, 2023
Dec. 31, 2023
Disclosure of operating segments [line items]          
Segment assets $ 4,571,232   $ 4,571,232   $ 5,364,710
Segment liabilities 4,837,196   4,837,196   $ 5,017,356
Nigeria          
Disclosure of operating segments [line items]          
Segment assets 864,285 $ 1,626,256 864,285 $ 1,626,256  
Segment liabilities 337,821 957,814 337,821 957,814  
Additions of property, plant and equipment, right of use assets and intangible assets 19,389 51,631 69,804 253,146  
SSA          
Disclosure of operating segments [line items]          
Segment assets 1,404,708 1,401,864 1,404,708 1,401,864  
Segment liabilities 918,208 819,213 918,208 819,213  
Additions of property, plant and equipment, right of use assets and intangible assets 34,226 28,005 72,812 81,158  
Latam          
Disclosure of operating segments [line items]          
Segment assets 1,950,563 2,137,361 1,950,563 2,137,361  
Segment liabilities 774,138 728,975 774,138 728,975  
Additions of property, plant and equipment, right of use assets and intangible assets 42,797 82,060 130,240 172,867  
MENA          
Disclosure of operating segments [line items]          
Segment assets 176,097 185,536 176,097 185,536  
Segment liabilities 101,060 113,263 101,060 113,263  
Additions of property, plant and equipment, right of use assets and intangible assets $ 2,443 $ 6,227 $ 4,939 $ 15,039