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Plant, Property and Equipment (Tables)
12 Months Ended
Dec. 31, 2016
Summary of Plant, Property and Equipment

The following table displays the details of Plant, property and equipment, which is stated at cost:

 

            (dollars in millions)  
At December 31,    Lives (years)      2016      2015  

Land

           $ 667       $ 709   

Buildings and equipment

     7-45         27,117         25,587   

Central office and other network equipment

     3-50         136,737         129,201   

Cable, poles and conduit

     7-50         45,639         44,290   

Leasehold improvements

     5-20         7,627         7,104   

Work in progress

             5,710         4,907   

Furniture, vehicles and other

     3-20         8,718         8,365   
     

 

 

 
        232,215         220,163   

Less accumulated depreciation

                147,464                 136,622   
     

 

 

 

Plant, property and equipment, net

      $ 84,751       $ 83,541