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Revenue Recognition - Disaggregation Of Revenue (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Disaggregation of Revenue [Line Items] |  |  |
Revenue from contracts with customers | $ 4,843 | $ 5,033 | $ 5,293
Out-of-period adjustment |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Immaterial error correction |  | UScellular recorded an adjustment to correct a prior period error related to the recognition of discounts for certain Prepaid customers, which decreased Service revenue by $5 million in 2023. This adjustment was not material to any of the periods impacted. |
Transferred over time |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from contracts with customers | 3,989 | $ 4,042 | 4,120
Transferred over time | Retail service |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from contracts with customers | 2,674 | 2,742 | 2,793
Transferred over time | Residential |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from contracts with customers | 740 | 700 | 669
Transferred over time | Commercial |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from contracts with customers | 148 | 155 | 173
Transferred over time | Wholesale |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from contracts with customers | 169 | 169 | 173
Transferred over time | Other service |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from contracts with customers | 258 | 276 | 312
Transferred at point in time | Equipment and product sales |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from contracts with customers | 854 | 991 | 1,173
UScellular |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from contracts with customers | 3,667 | 3,805 | 4,076
UScellular | Transferred over time |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from contracts with customers | 2,884 | 2,943 | 3,032
UScellular | Transferred over time | Retail service |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from contracts with customers | 2,674 | 2,742 | 2,793
UScellular | Transferred over time | Retail service | Out-of-period adjustment |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from contracts with customers |  | (5) |
UScellular | Transferred over time | Residential |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from contracts with customers | 0 | 0 | 0
UScellular | Transferred over time | Commercial |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from contracts with customers | 0 | 0 | 0
UScellular | Transferred over time | Wholesale |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from contracts with customers | 0 | 0 | 0
UScellular | Transferred over time | Other service |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from contracts with customers | 210 | 201 | 239
UScellular | Transferred at point in time | Equipment and product sales |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from contracts with customers | 783 | 862 | 1,044
TDS Telecom |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from contracts with customers | 1,058 | 1,025 | 1,016
TDS Telecom | Transferred over time |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from contracts with customers | 1,057 | 1,024 | 1,015
TDS Telecom | Transferred over time | Retail service |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from contracts with customers | 0 | 0 | 0
TDS Telecom | Transferred over time | Residential |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from contracts with customers | 740 | 700 | 669
TDS Telecom | Transferred over time | Commercial |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from contracts with customers | 148 | 155 | 173
TDS Telecom | Transferred over time | Wholesale |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from contracts with customers | 169 | 169 | 173
TDS Telecom | Transferred over time | Other service |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from contracts with customers | 0 | 0 | 0
TDS Telecom | Transferred at point in time | Equipment and product sales |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from contracts with customers | 1 | 1 | 1
Corporate, Eliminations and Other |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from contracts with customers | 118 | 203 | 201
Corporate, Eliminations and Other | Transferred over time |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from contracts with customers | 48 | 75 | 73
Corporate, Eliminations and Other | Transferred over time | Retail service |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from contracts with customers | 0 | 0 | 0
Corporate, Eliminations and Other | Transferred over time | Residential |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from contracts with customers | 0 | 0 | 0
Corporate, Eliminations and Other | Transferred over time | Commercial |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from contracts with customers | 0 | 0 | 0
Corporate, Eliminations and Other | Transferred over time | Wholesale |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from contracts with customers | 0 | 0 | 0
Corporate, Eliminations and Other | Transferred over time | Other service |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from contracts with customers | 48 | 75 | 73
Corporate, Eliminations and Other | Transferred at point in time | Equipment and product sales |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from contracts with customers | $ 70 | $ 128 | $ 128

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