XML 372 R33.htm IDEA: XBRL DOCUMENT v3.25.1
Introduction - Change in accounting estimate (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Disclosure of detailed information about property, plant and equipment [line items]      
Depreciation $ (916) $ (978) $ (999)
Change in useful life      
Disclosure of detailed information about property, plant and equipment [line items]      
Depreciation $ 48 $ 27  
Fiber optic network      
Disclosure of detailed information about property, plant and equipment [line items]      
Estimated useful lives 25 years 15 years  
Related equipment/software | Bottom of range      
Disclosure of detailed information about property, plant and equipment [line items]      
Estimated useful lives 5 years    
Related equipment/software | Top of range      
Disclosure of detailed information about property, plant and equipment [line items]      
Estimated useful lives 10 years    
Networks (including civil works) | Bottom of range      
Disclosure of detailed information about property, plant and equipment [line items]      
Estimated useful lives 5 years 5 years  
Networks (including civil works) | Top of range      
Disclosure of detailed information about property, plant and equipment [line items]      
Estimated useful lives 25 years 7 years  
Computer software      
Disclosure of detailed information about property, plant and equipment [line items]      
Estimated useful lives   5 years  
Towers, poles and ducts      
Disclosure of detailed information about property, plant and equipment [line items]      
Estimated useful lives   25 years 15 years
Civil works of towers, poles and ducts      
Disclosure of detailed information about property, plant and equipment [line items]      
Estimated useful lives   15 years 10 years