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The Millicom Group - A.4.2 Discontinued operations (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Disclosure of analysis of single amount of discontinued operations [line items]      
Profit (loss) from operating activities $ 1,639 $ 1,342 $ 826
Discontinued operations      
Disclosure of analysis of single amount of discontinued operations [line items]      
Profit (loss) from operating activities $ 0 $ (3) $ 4