v3.25.3
Summary of Significant Accounting Policies - Property and Equipment (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Summary of Significant Accounting Policies    
Property and equipment, gross $ 1,829 $ 1,583
Accumulated depreciation (679) (530)
Property and equipment, net 1,150 1,053
Depreciation expense 147 166
Capitalized interest costs 10 7
Land    
Summary of Significant Accounting Policies    
Property and equipment, gross 13 16
Buildings    
Summary of Significant Accounting Policies    
Property and equipment, gross $ 114 $ 108
Useful lives of property and equipment 25 years 25 years
Telephony transmission equipment and distribution facilities    
Summary of Significant Accounting Policies    
Property and equipment, gross $ 899 $ 832
Telephony transmission equipment and distribution facilities | Minimum    
Summary of Significant Accounting Policies    
Useful lives of property and equipment 5 years 5 years
Telephony transmission equipment and distribution facilities | Maximum    
Summary of Significant Accounting Policies    
Useful lives of property and equipment 20 years 20 years
Cable transmission equipment and distribution facilities    
Summary of Significant Accounting Policies    
Property and equipment, gross $ 156 $ 118
Cable transmission equipment and distribution facilities | Minimum    
Summary of Significant Accounting Policies    
Useful lives of property and equipment 5 years 5 years
Cable transmission equipment and distribution facilities | Maximum    
Summary of Significant Accounting Policies    
Useful lives of property and equipment 30 years 30 years
Support equipment and systems    
Summary of Significant Accounting Policies    
Property and equipment, gross $ 128 $ 112
Support equipment and systems | Minimum    
Summary of Significant Accounting Policies    
Useful lives of property and equipment 3 years 3 years
Support equipment and systems | Maximum    
Summary of Significant Accounting Policies    
Useful lives of property and equipment 20 years 20 years
Fiber optic cable systems    
Summary of Significant Accounting Policies    
Property and equipment, gross $ 130 $ 128
Fiber optic cable systems | Minimum    
Summary of Significant Accounting Policies    
Useful lives of property and equipment 15 years 15 years
Fiber optic cable systems | Maximum    
Summary of Significant Accounting Policies    
Useful lives of property and equipment 25 years 25 years
Other    
Summary of Significant Accounting Policies    
Property and equipment, gross $ 87 $ 72
Other | Minimum    
Summary of Significant Accounting Policies    
Useful lives of property and equipment 2 years 2 years
Other | Maximum    
Summary of Significant Accounting Policies    
Useful lives of property and equipment 20 years 20 years
Construction in progress    
Summary of Significant Accounting Policies    
Property and equipment, gross $ 302 $ 197