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HELD FOR SALE AND DISCONTINUED OPERATIONS - Summary of total profit/ (loss) and other comprehensive income of discontinued operations (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Disclosure of Analysis of Profit or Loss of Disposal Groups [Line Items]      
Loss after tax from discontinued operations and disposals of discontinued operations $ 0 $ (2,830) $ (742)
Loss after tax from discontinued operations and disposals of discontinued operations   (2,830) (742)
Omnium Telecom Algerie SpA      
Disclosure of Analysis of Profit or Loss of Disposal Groups [Line Items]      
Loss after tax from discontinued operations and disposals of discontinued operations   0 144
Loss on disposal   0 (722)
Russian cash generating units      
Disclosure of Analysis of Profit or Loss of Disposal Groups [Line Items]      
Loss after tax from discontinued operations and disposals of discontinued operations   916 (164)
Loss on disposal   $ (3,746) $ 0