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Intangible Assets, Narrative (Details) - USD ($) $ in Millions | 9 Months Ended |
--- | --- | ---
Sep. 30, 2017 | Dec. 31, 2016
Indefinite Lived Intangible Assets By Major Class Line Items |  |
Loss on impairment | $ 262 |
Goodwill | 508 | $ 766
Franchise rights |  |
Indefinite Lived Intangible Assets By Major Class Line Items |  |
Other | 0 |
U.S. Cellular |  |
Indefinite Lived Intangible Assets By Major Class Line Items |  |
Loss on impairment | 227 |
Goodwill | 0 | 227
U.S. Cellular | Goodwill |  |
Indefinite Lived Intangible Assets By Major Class Line Items |  |
Accumulated impairment losses in prior periods |  | 334
TDS Telecom Wireline |  |
Indefinite Lived Intangible Assets By Major Class Line Items |  |
Loss on impairment | 0 |
Goodwill | 409 | 409
TDS Telecom Wireline | Goodwill |  |
Indefinite Lived Intangible Assets By Major Class Line Items |  |
Accumulated impairment losses in prior periods |  | 29
TDS Telecom Cable |  |
Indefinite Lived Intangible Assets By Major Class Line Items |  |
Loss on impairment | 0 |
Goodwill | 99 | 95
TDS Telecom Cable | Goodwill |  |
Indefinite Lived Intangible Assets By Major Class Line Items |  |
Accumulated impairment losses in prior periods |  | 0
TDS Telecom HMS |  |
Indefinite Lived Intangible Assets By Major Class Line Items |  |
Loss on impairment | 35 |
Goodwill | $ 0 | 35
TDS Telecom HMS | Goodwill |  |
Indefinite Lived Intangible Assets By Major Class Line Items |  |
Accumulated impairment losses in prior periods |  | 84
Corporate, Eliminations and Other | Goodwill |  |
Indefinite Lived Intangible Assets By Major Class Line Items |  |
Accumulated impairment losses in prior periods |  | $ 4

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