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Segment reporting - Reconciliation of information on reportable segments to the amounts reported in the financial statements (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
Geographical information          
Segment Adjusted EBITDA $ 281,758 $ 273,755 $ 781,489 $ 969,047  
Finance costs [1] (350,825) (271,595) (2,163,157) (1,816,864)  
Depreciation and amortization (91,308) (104,931) (266,040) (340,381)  
Impairment of withholding tax receivables (21,855) (10,508) (32,827) (35,112)  
Impairment of property, plant and equipment, intangible assets excluding goodwill and related prepaid land rent (4,132) (103,429) (10,075) (108,510)  
Share-based payment expense (1,813) (2,654) (9,879) (9,571)  
Other costs (1,783) (3,211) (8,175) (8,059)  
Business combination costs (578) (161) (958) (1,647)  
Impairment of Goodwill     (87,894)    
Impairment of assets held for sale     (2,853)    
Impairment of other fixed assets     (31)    
Insurance claims 11 32 51 310  
Net gain on disposal of property, plant and equipment 1,270 386 3,562 952  
Finance income 25,732 5,823 49,696 18,233  
Other non-operating income   1   59  
Unallocated corporate expenses (35,783) (35,653) (99,507) (110,694)  
Loss before income tax [1] (199,306) (252,145) (1,846,598) (1,442,237)  
Segment assets 4,571,232   4,571,232   $ 5,364,710
Segment liabilities 4,837,196   4,837,196   $ 5,017,356
Costs related to internal reorganization 900 600 2,700 700  
Consulting fees relating to corporate structures and operating systems 700 1,700 5,200 4,500  
Other one-off consulting fees 0 700 0 1,700  
Professional costs related to financing 100 0 200 200  
Cost of sales          
Geographical information          
Impairment of property, plant and equipment, intangible assets excluding goodwill and related prepaid land rent (4,132) (103,429) (10,075) (108,510)  
Impairment of assets held for sale     (2,853)    
SSA          
Geographical information          
Segment Adjusted EBITDA 81,046 66,285 227,154 194,701  
Segment assets 1,404,708 1,401,864 1,404,708 1,401,864  
Segment liabilities $ 918,208 $ 819,213 $ 918,208 $ 819,213  
[1] Revised comparative periods to reflect an adjustment related to the accounting treatment of foreign exchange on goods in transit in Nigeria (see note 21).