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Performance B.5. Other non-operating (expenses) income, net (Details) - USD ($)
$ in Millions
 1 Months Ended 12 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Disclosure of fair value measurement of assets [line items]          
Change in fair value of derivatives     $ 3 $ (11) $ 0
Change in value of put option liability     (31) 5 (25)
Exchange gains (losses), net     (43) (69) (32)
Other non-operating income (expenses), net     3 3 10
Total     (50) [1] (106) 227
Proceeds from disposal of equity investments, net of costs     163 [2] 197 25
Gain (loss) on disposal of equity investments     (15) 25 (32)
Equity Investment In Jumia          
Disclosure of fair value measurement of assets [line items]          
Change in fair value in investment     0 (18) (38)
Proceeds from disposal of equity investments, net of costs   $ 29      
Gain (loss) on disposal of equity investments   $ 15      
Equity Investment In HTA          
Disclosure of fair value measurement of assets [line items]          
Change in fair value in investment     $ 18 $ (16) $ 312
Proceeds from disposal of equity investments, net of costs $ 163        
Gain (loss) on disposal of equity investments $ (15)        
[1] (i)    Tigo Guatemala is 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.
[2] The cash flows 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.