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Performance B.3. Segmental Information - Revenue from contracts with customers (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Disclosure of disaggregation of revenue from contracts with customers [line items]      
Revenue $ 5,624 [1] $ 4,261 [2] $ 3,805 [2]
Mobile      
Disclosure of disaggregation of revenue from contracts with customers [line items]      
Revenue 2,957 2,000 1,759
Cable and other fixed services      
Disclosure of disaggregation of revenue from contracts with customers [line items]      
Revenue 2,145 1,938 1,794
Other      
Disclosure of disaggregation of revenue from contracts with customers [line items]      
Revenue 69 60 51
Service revenue      
Disclosure of disaggregation of revenue from contracts with customers [line items]      
Revenue 5,171 3,997 3,604
Telephone and equipment      
Disclosure of disaggregation of revenue from contracts with customers [line items]      
Revenue 454 263 201
Over time | Mobile      
Disclosure of disaggregation of revenue from contracts with customers [line items]      
Revenue 2,916 1,963 1,727
Over time | Cable and other fixed services      
Disclosure of disaggregation of revenue from contracts with customers [line items]      
Revenue 2,145 1,938 1,794
Over time | Other      
Disclosure of disaggregation of revenue from contracts with customers [line items]      
Revenue 69 60 51
Point in time | Mobile      
Disclosure of disaggregation of revenue from contracts with customers [line items]      
Revenue 40 37 32
Point in time | Telephone and equipment      
Disclosure of disaggregation of revenue from contracts with customers [line items]      
Revenue $ 454 $ 263 $ 201
[1] 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] Re-presented for discontinued operations (see note A.4.)