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Basis of Presentation (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2017 | Sep. 30, 2016 | Sep. 30, 2017 | Sep. 30, 2016
Basis of Presentation [Line Items] |  |  |  |
Amounts recorded gross in revenues that are billed to customers and remitted to governmental authorities | $ 20 | $ 21 | $ 58 | $ 65
Equipment Installment Plans Accounting Change |  |  |  |
Service revenue | 988 | 1,026 | 2,976 | 3,058
Interest and dividend income | 4 | 2 | 12 | 7
Adjustment |  |  |  |
Equipment Installment Plans Accounting Change |  |  |  |
Service revenue | $ 19 | 13 | $ 52 | 37
Interest and dividend income |  | $ (13) |  | $ (37)
U.S. Cellular |  |  |  |
Basis of Presentation [Line Items] |  |  |  |
TDS ownership of U.S. Cellular | 83.00% |  | 83.00% |

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