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IMPAIRMENT OF ASSETS - Impairment losses- Narrative (Details) - USD ($)
$ in Millions
 12 Months Ended
Sep. 30, 2022
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2020
Dec. 31, 2018
Impairment losses            
Impairment loss / (reversal)   $ 3 $ (6) $ (107)    
Accruals for expected credit losses   0 48 0    
Non-current assets   $ 5,136 5,060      
Budget and forecast period   5 years        
All CGUs            
Impairment losses            
Impairment loss / (reversal)     $ 0      
Bangladesh            
Impairment losses            
Impairment loss / (reversal)       (100)    
Accruals for expected credit losses           $ 451
Recoverable amount $ 474          
Amount by which unit's recoverable amount exceeds its carrying amount 119          
Non-current assets 355          
Impairment reversal 100          
Reversal of impairment loss recognised in profit or loss, intangible assets other than goodwill 68          
Reversal of impairment loss recognised in profit or loss, property, plant and equipment 32          
Bangladesh | Fully depreciated assets            
Impairment losses            
Impairment reversal 19          
Kyrgyzstan            
Impairment losses            
Impairment loss / (reversal)       $ (49)    
Accruals for expected credit losses         $ 64  
Recoverable amount 25          
Amount by which unit's recoverable amount exceeds its carrying amount 51          
Impairment reversal 49          
Reversal of impairment loss recognised in profit or loss, intangible assets other than goodwill 9          
Reversal of impairment loss recognised in profit or loss, property, plant and equipment 29          
Reversal of impairment loss recognised In profit or loss, other assets 11          
Reversal of impairment loss recognised In profit or loss, other assets, depreciated assets $ 2