Annual report pursuant to Section 13 and 15(d)

Summary of Significant Accounting Policies - Property and Equipment (Details)

v3.24.0.1
Summary of Significant Accounting Policies - Property and Equipment (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Property, Plant and Equipment [Line Items]      
Property and equipment $ 1,583 $ 1,396  
Accumulated depreciation (530) (385)  
Property and equipment, net 1,053 1,011  
Depreciation expense 166 195 $ 192
Capitalized interest costs 7 4 $ 2
Land      
Property, Plant and Equipment [Line Items]      
Property and equipment, gross $ 16 16  
Building      
Property, Plant and Equipment [Line Items]      
Remaining useful lives of property and equipment 25 years    
Property and equipment, gross $ 108 105  
Telephony transmission equipment and distribution facilities      
Property, Plant and Equipment [Line Items]      
Property and equipment, gross $ 832 810  
Telephony transmission equipment and distribution facilities | Minimum      
Property, Plant and Equipment [Line Items]      
Remaining useful lives of property and equipment 5 years    
Telephony transmission equipment and distribution facilities | Maximum      
Property, Plant and Equipment [Line Items]      
Remaining useful lives of property and equipment 20 years    
Cable transmission equipment and distribution facilities      
Property, Plant and Equipment [Line Items]      
Property and equipment, gross $ 118 108  
Cable transmission equipment and distribution facilities | Minimum      
Property, Plant and Equipment [Line Items]      
Remaining useful lives of property and equipment 5 years    
Cable transmission equipment and distribution facilities | Maximum      
Property, Plant and Equipment [Line Items]      
Remaining useful lives of property and equipment 30 years    
Support equipment and systems      
Property, Plant and Equipment [Line Items]      
Property and equipment, gross $ 112 106  
Support equipment and systems | Minimum      
Property, Plant and Equipment [Line Items]      
Remaining useful lives of property and equipment 3 years    
Support equipment and systems | Maximum      
Property, Plant and Equipment [Line Items]      
Remaining useful lives of property and equipment 20 years    
Fiber optic cable systems      
Property, Plant and Equipment [Line Items]      
Property and equipment, gross $ 128 73  
Fiber optic cable systems | Minimum      
Property, Plant and Equipment [Line Items]      
Remaining useful lives of property and equipment 15 years    
Fiber optic cable systems | Maximum      
Property, Plant and Equipment [Line Items]      
Remaining useful lives of property and equipment 25 years    
Other      
Property, Plant and Equipment [Line Items]      
Property and equipment, gross $ 72 52  
Other | Minimum      
Property, Plant and Equipment [Line Items]      
Remaining useful lives of property and equipment 2 years    
Other | Maximum      
Property, Plant and Equipment [Line Items]      
Remaining useful lives of property and equipment 20 years    
Construction in progress      
Property, Plant and Equipment [Line Items]      
Property and equipment, gross $ 197 $ 126