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Financial risk management - D.6. Capital management (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Financial Instruments [Abstract]      
Net financial obligations $ 7,981 $ 5,837 $ 5,902
EBITDA $ 1,639 $ 1,495  
Net financial obligations to EBITDA 487.00% 390.00%  
Equity attributable to Owners of the Company $ 2,583 [1] $ 2,059  
Net financial obligations and equity $ 10,564 $ 7,896  
Gearing ratio 76.00% 74.00%  
[1] The assets and liabilities of Tigo Guatemala are fully consolidated since the acquisition of the remaining 45% shareholding on November 12, 2021. See note A.1.2. for further details. As a result, numbers might not be directly comparable with previous years' figures.