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Property, Plant And Equipment (Property, Plant And Equipment, Net) (Details) - USD ($)
$ in Millions
Dec. 31, 2024
Dec. 31, 2023
Property, Plant and Equipment [Line Items]    
Property, plant and equipment $ 19,318 $ 16,324
Less: Accumulated depreciation (3,640) (2,391)
Property, plant and equipment, net 15,678 13,933
Land [Member]    
Property, Plant and Equipment [Line Items]    
Property, plant and equipment 241 243
Buildings And Leasehold Improvements [Member]    
Property, Plant and Equipment [Line Items]    
Property, plant and equipment $ 1,250 1,221
Estimated useful lives 40 years  
General Support [Member]    
Property, Plant and Equipment [Line Items]    
Property, plant and equipment $ 591 427
General Support [Member] | Maximum [Member]    
Property, Plant and Equipment [Line Items]    
Estimated useful lives 15 years  
General Support [Member] | Minimum [Member]    
Property, Plant and Equipment [Line Items]    
Estimated useful lives 5 years  
Central Office Electronic Circuit Equipment [Member]    
Property, Plant and Equipment [Line Items]    
Property, plant and equipment $ 3,226 2,467
Central Office Electronic Circuit Equipment [Member] | Maximum [Member]    
Property, Plant and Equipment [Line Items]    
Estimated useful lives 8 years  
Central Office Electronic Circuit Equipment [Member] | Minimum [Member]    
Property, Plant and Equipment [Line Items]    
Estimated useful lives 5 years  
Poles [Member]    
Property, Plant and Equipment [Line Items]    
Property, plant and equipment $ 1,074 915
Estimated useful lives 30 years  
Cable, Fiber And Wire [Member]    
Property, Plant and Equipment [Line Items]    
Property, plant and equipment $ 9,921 7,718
Cable, Fiber And Wire [Member] | Maximum [Member]    
Property, Plant and Equipment [Line Items]    
Estimated useful lives 27 years  
Cable, Fiber And Wire [Member] | Minimum [Member]    
Property, Plant and Equipment [Line Items]    
Estimated useful lives 15 years  
Conduit [Member]    
Property, Plant and Equipment [Line Items]    
Property, plant and equipment $ 1,429 1,416
Estimated useful lives 50 years  
Construction Work In Progress [Member]    
Property, Plant and Equipment [Line Items]    
Property, plant and equipment $ 1,155 $ 1,323