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Property, Plant and Equipment (Tables)
12 Months Ended
Dec. 31, 2021
Property, Plant and Equipment [Abstract]  
Property, plant and equipment
TDS’ Property, plant and equipment in service and under construction, and related accumulated depreciation and amortization, as of December 31, 2021 and 2020, were as follows:
December 31,Useful Lives (Years)20212020
(Dollars in millions)   
LandN/A$62 $56 
Buildings5-40541 533 
Leasehold and land improvements1-301,476 1,404 
Cable and wire15-402,403 2,195 
Network and switching equipment3-102,671 2,634 
Cell site equipment7-254,150 4,017 
Office furniture and equipment3-10346 394 
Other operating assets and equipment1-12176 189 
System development1-71,864 1,709 
Work in processN/A576 528 
Total property, plant and equipment, gross 14,265 13,659 
Accumulated depreciation and amortization (9,904)(9,687)
Total property, plant and equipment, net $4,361 $3,972