v3.25.1
Revenue Recognition - Disaggregation of Revenue (Details) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Disaggregation of revenue    
Revenue from contracts with customers $ 1,126 $ 1,230
Operating lease income 28 32
Total operating revenues 1,154 1,262
Transferred over time    
Disaggregation of revenue    
Revenue from contracts with customers 969 1,012
Transferred over time | Retail service    
Disaggregation of revenue    
Revenue from contracts with customers 660 678
Transferred over time | Residential    
Disaggregation of revenue    
Revenue from contracts with customers 184 185
Transferred over time | Commercial    
Disaggregation of revenue    
Revenue from contracts with customers 35 37
Transferred over time | Wholesale    
Disaggregation of revenue    
Revenue from contracts with customers 38 43
Transferred over time | Other service    
Disaggregation of revenue    
Revenue from contracts with customers 52 69
Transferred at point in time | Equipment and product sales    
Disaggregation of revenue    
Revenue from contracts with customers 157 218
UScellular Total    
Disaggregation of revenue    
Revenue from contracts with customers 864 925
Operating lease income 27 25
Total operating revenues 891 950
UScellular Total | Transferred over time    
Disaggregation of revenue    
Revenue from contracts with customers 714 729
UScellular Total | Transferred over time | Retail service    
Disaggregation of revenue    
Revenue from contracts with customers 660 678
UScellular Total | Transferred over time | Residential    
Disaggregation of revenue    
Revenue from contracts with customers 0 0
UScellular Total | Transferred over time | Commercial    
Disaggregation of revenue    
Revenue from contracts with customers 0 0
UScellular Total | Transferred over time | Wholesale    
Disaggregation of revenue    
Revenue from contracts with customers 0 0
UScellular Total | Transferred over time | Other service    
Disaggregation of revenue    
Revenue from contracts with customers 54 51
UScellular Total | Transferred at point in time | Equipment and product sales    
Disaggregation of revenue    
Revenue from contracts with customers 150 196
TDS Telecom    
Disaggregation of revenue    
Revenue from contracts with customers 256 266
Operating lease income 1 1
Total operating revenues 257 266
TDS Telecom | Transferred over time    
Disaggregation of revenue    
Revenue from contracts with customers 256 265
TDS Telecom | Transferred over time | Retail service    
Disaggregation of revenue    
Revenue from contracts with customers 0 0
TDS Telecom | Transferred over time | Residential    
Disaggregation of revenue    
Revenue from contracts with customers 184 185
TDS Telecom | Transferred over time | Commercial    
Disaggregation of revenue    
Revenue from contracts with customers 35 37
TDS Telecom | Transferred over time | Wholesale    
Disaggregation of revenue    
Revenue from contracts with customers 38 43
TDS Telecom | Transferred over time | Other service    
Disaggregation of revenue    
Revenue from contracts with customers 0 0
TDS Telecom | Transferred at point in time | Equipment and product sales    
Disaggregation of revenue    
Revenue from contracts with customers 0 0
Corporate, Eliminations and Other    
Disaggregation of revenue    
Revenue from contracts with customers 5 40
Operating lease income 0 6
Total operating revenues 5 46
Corporate, Eliminations and Other | Transferred over time    
Disaggregation of revenue    
Revenue from contracts with customers (2) 18
Corporate, Eliminations and Other | Transferred over time | Retail service    
Disaggregation of revenue    
Revenue from contracts with customers 0 0
Corporate, Eliminations and Other | Transferred over time | Residential    
Disaggregation of revenue    
Revenue from contracts with customers 0 0
Corporate, Eliminations and Other | Transferred over time | Commercial    
Disaggregation of revenue    
Revenue from contracts with customers 0 0
Corporate, Eliminations and Other | Transferred over time | Wholesale    
Disaggregation of revenue    
Revenue from contracts with customers 0 0
Corporate, Eliminations and Other | Transferred over time | Other service    
Disaggregation of revenue    
Revenue from contracts with customers (2) 18
Corporate, Eliminations and Other | Transferred at point in time | Equipment and product sales    
Disaggregation of revenue    
Revenue from contracts with customers $ 7 $ 22