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Revenue Recognition - Disaggregation Of Revenue (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Disaggregation of Revenue [Line Items] |  |  |
Revenue from contracts with customers | $ 5,220 | $ 5,120 | $ 5,076
Out-of-period adjustment |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Immaterial error correction | During the third quarter of 2021, UScellular recorded a $9 million out-of-period error related to the timing of recognition of regulatory fee billings. This adjustment had the impact of increasing Service revenue by $9 million in 2021. UScellular determined that this adjustment was not material to any of the periods impacted. |  |
Transferred over time |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from contracts with customers | $ 4,107 | 4,031 | 3,959
Transferred over time | Retail service |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from contracts with customers | 2,765 | 2,686 | 2,650
Transferred over time | Inbound roaming |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from contracts with customers | 110 | 152 | 174
Transferred over time | Residential |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from contracts with customers | 641 | 594 | 533
Transferred over time | Commercial |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from contracts with customers | 183 | 194 | 205
Transferred over time | Wholesale |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from contracts with customers | 178 | 184 | 188
Transferred over time | Other service |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from contracts with customers | 230 | 221 | 209
Transferred at point in time | Equipment and product sales |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from contracts with customers | 1,113 | 1,089 | 1,117
UScellular |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from contracts with customers | 4,039 | 3,960 | 3,948
UScellular | Transferred over time |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from contracts with customers | 3,032 | 2,990 | 2,961
UScellular | Transferred over time | Retail service |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from contracts with customers | 2,765 | 2,686 | 2,650
UScellular | Transferred over time | Retail service | Out-of-period adjustment |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from contracts with customers | 9 |  |
UScellular | Transferred over time | Inbound roaming |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from contracts with customers | 110 | 152 | 174
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 | 157 | 152 | 137
UScellular | Transferred at point in time | Equipment and product sales |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from contracts with customers | 1,007 | 970 | 987
TDS Telecom |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from contracts with customers | 1,003 | 973 | 927
TDS Telecom | Transferred over time |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from contracts with customers | 1,002 | 972 | 926
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 | Inbound roaming |  |  |
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 | 641 | 594 | 533
TDS Telecom | Transferred over time | Commercial |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from contracts with customers | 183 | 194 | 205
TDS Telecom | Transferred over time | Wholesale |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from contracts with customers | 178 | 184 | 188
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 | 178 | 187 | 201
Corporate, Eliminations and Other | Transferred over time |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from contracts with customers | 73 | 69 | 72
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 | Inbound roaming |  |  |
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 | 73 | 69 | 72
Corporate, Eliminations and Other | Transferred at point in time | Equipment and product sales |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from contracts with customers | $ 105 | $ 118 | $ 129

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