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Acquisitions, Divestitures and Exchanges, divestitures (Details) (USD $) | 3 Months Ended | 9 Months Ended | 0 Months Ended | 3 Months Ended | 9 Months Ended | 12 Months Ended | 9 Months Ended | 3 Months Ended | 9 Months Ended | 3 Months Ended | 9 Months Ended | 23 Months Ended | 0 Months Ended | 9 Months Ended | 12 Months Ended | 26 Months Ended | 38 Months Ended | 9 Months Ended | 12 Months Ended | 26 Months Ended | 38 Months Ended | 9 Months Ended | 23 Months Ended | 12 Months Ended | 36 Months Ended | 9 Months Ended | 3 Months Ended | 9 Months Ended | 23 Months Ended | 36 Months Ended | 9 Months Ended
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Sep. 30, 2014 | Sep. 30, 2013 | Sep. 30, 2014 | Sep. 30, 2013 | Sep. 10, 2014 Airadigm Communications, Inc. | Sep. 30, 2014 Airadigm Communications, Inc. | Sep. 30, 2014 Airadigm Communications, Inc. | Dec. 31, 2014 Minimum Expected event Airadigm Communications, Inc. | Dec. 31, 2014 Maximum Expected event Airadigm Communications, Inc. | Sep. 30, 2014 Employee related costs including severance, retention and outplacement Airadigm Communications, Inc. | Sep. 30, 2014 Contract termination costs Other current liabilities Airadigm Communications, Inc. | Sep. 30, 2014 Contract termination costs Other deferred liabilities and credits Airadigm Communications, Inc. | Sep. 30, 2014 U.S. Cellular | Sep. 30, 2013 U.S. Cellular | Sep. 30, 2014 U.S. Cellular | Sep. 30, 2013 U.S. Cellular | Sep. 30, 2014 U.S. Cellular Divestiture Transaction | Sep. 30, 2013 U.S. Cellular Divestiture Transaction | Sep. 30, 2014 U.S. Cellular Divestiture Transaction | Sep. 30, 2013 U.S. Cellular Divestiture Transaction | Sep. 30, 2014 U.S. Cellular Divestiture Transaction | Mar. 05, 2014 U.S. Cellular St. Louis | Sep. 30, 2014 U.S. Cellular St. Louis | Dec. 31, 2013 U.S. Cellular Minimum Divestiture Transaction | Dec. 31, 2014 U.S. Cellular Minimum Expected event Divestiture Transaction | Dec. 31, 2015 U.S. Cellular Minimum Expected event Divestiture Transaction | Sep. 30, 2014 U.S. Cellular Maximum Divestiture Transaction | Dec. 31, 2013 U.S. Cellular Maximum Divestiture Transaction | Dec. 31, 2014 U.S. Cellular Maximum Expected event Divestiture Transaction | Dec. 31, 2015 U.S. Cellular Maximum Expected event Divestiture Transaction | Sep. 30, 2013 U.S. Cellular Purchase price Divestiture Transaction | Sep. 30, 2014 U.S. Cellular Purchase price Divestiture Transaction | Dec. 31, 2013 U.S. Cellular Purchase price Minimum Divestiture Transaction | Dec. 31, 2013 U.S. Cellular Purchase price Maximum Divestiture Transaction | Dec. 31, 2015 U.S. Cellular Sprint Cost Reimbursement Maximum Expected event Divestiture Transaction | Sep. 30, 2014 U.S. Cellular Sprint Cost Reimbursement Cash received from divestitures Divestiture Transaction | Sep. 30, 2014 U.S. Cellular Sprint Cost Reimbursement (Gain) loss on sale of business and other exit costs, net Divestiture Transaction | Sep. 30, 2013 U.S. Cellular Sprint Cost Reimbursement (Gain) loss on sale of business and other exit costs, net Divestiture Transaction | Sep. 30, 2014 U.S. Cellular Sprint Cost Reimbursement (Gain) loss on sale of business and other exit costs, net Divestiture Transaction | Sep. 30, 2013 U.S. Cellular Sprint Cost Reimbursement (Gain) loss on sale of business and other exit costs, net Divestiture Transaction | Sep. 30, 2014 U.S. Cellular Sprint Cost Reimbursement (Gain) loss on sale of business and other exit costs, net Divestiture Transaction | Dec. 31, 2015 U.S. Cellular Sprint Cost Reimbursement (Gain) loss on sale of business and other exit costs, net Minimum Expected event Divestiture Transaction | Dec. 31, 2015 U.S. Cellular Sprint Cost Reimbursement (Gain) loss on sale of business and other exit costs, net Maximum Expected event Divestiture Transaction | Dec. 31, 2015 U.S. Cellular Sprint Cost Reimbursement Cost of services Maximum Expected event Divestiture Transaction | Sep. 30, 2014 U.S. Cellular Employee related costs including severance, retention and outplacement Divestiture Transaction | Sep. 30, 2014 U.S. Cellular Contract termination costs Other current liabilities Divestiture Transaction | Sep. 30, 2014 U.S. Cellular Contract termination costs Other deferred liabilities and credits Divestiture Transaction | Sep. 30, 2014 U.S. Cellular Contract termination costs Accounts payable Divestiture Transaction
Divestitures |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business divestiture date |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | May 16, 2013 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business divestiture description |  |  |  |  |  |  | On May 23, 2014 (the “Signing Date”), U.S. Cellular entered into a License Purchase and Customer Recommendation Agreement with Airadigm. Pursuant to the License Purchase and Customer Recommendation Agreement, on September 10, 2014, Airadigm transferred to U.S. Cellular Federal Communications Commission (“FCC”) spectrum licenses and certain tower assets in certain markets in Wisconsin, Iowa, Minnesota and Michigan, in consideration for $91.5 million in cash. Since both parties to this transaction are controlled by TDS, upon closing, U.S. Cellular recorded the transferred assets at Airadigm’s net book value. The transaction also impacts the expected realization of Airadigm’s federal net operating loss carryforwards and therefore TDS reduced its valuation allowance by $10.8 million upon the transaction closing and recognized an income tax benefit for this same amount. See Note 3 — Income Taxes. |  |  |  |  |  |  |  |  |  |  |  |  |  | On November 6, 2012, U.S. Cellular entered into a Purchase and Sale Agreement with subsidiaries of Sprint Corp., fka Sprint Nextel Corporation (“Sprint”). Pursuant to the Purchase and Sale Agreement, on May 16, 2013, U.S. Cellular transferred customers and certain PCS license spectrum to Sprint in U.S. Cellular’s Chicago, central Illinois, St. Louis and certain Indiana/Michigan/Ohio markets (“Divestiture Markets”) in consideration for $480 million in cash. The Purchase and Sale Agreement also contemplated certain other agreements, together with the Purchase and Sale Agreement collectively referred to as the “Divestiture Transaction.” Pursuant to the Purchase and Sale Agreement, U.S. Cellular and Sprint also entered into certain other agreements, including customer and network transition services agreements, which require U.S. Cellular to provide customer, billing and network services to Sprint for a period of up to 24 months after the May 16, 2013 closing date. Sprint will reimburse U.S. Cellular for providing such services at an amount equal to U.S. Cellular’s estimated costs, including applicable overhead allocations. These services were substantially complete as of March 31, 2014. In addition, these agreements require Sprint to reimburse U.S. Cellular up to $200 million (the “Sprint Cost Reimbursement”) for certain network decommissioning costs, network site lease rent and termination costs, network access termination costs, and employee termination benefits for specified engineering employees. |  |  |  | On March 5, 2014, U.S. Cellular sold the majority of its St. Louis area non-operating market spectrum license for $92.3 million. A gain of $75.8 million was recorded in (Gain) loss on license sales and exchanges in the Consolidated Statement of Operations in the first quarter of 2014. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Transition services agreement duration |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 24 months |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
(Increase) decrease in Operating Income | $ 125,415,000 | $ 33,085,000 | $ 153,820,000 | $ (256,296,000) |  |  |  |  |  |  |  |  |  |  | $ 51,354,000 | $ 43,207,000 | $ 93,836,000 | $ (177,351,000) | $ (6,794,000) | $ 43,333,000 | $ (11,403,000) | $ (164,770,000) | $ (90,314,000) |  |  |  |  | $ (126,927,000) |  |  |  | $ (140,927,000) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
(Gain) loss on license sales and exchanges |  |  | (91,446,000) |  |  |  |  |  |  |  |  |  |  |  |  |  | (91,446,000) |  |  |  |  |  |  | (75,800,000) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Increase (decrease) in valuation allowance |  |  |  |  | (10,800,000) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Divestiture Financial Impacts |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash received from divestitures |  |  | (151,369,000) | (484,300,000) | (91,500,000) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (92,300,000) |  |  |  |  |  |  |  |  | (480,000,000) | (480,000,000) | (480,000,000) | (480,000,000) | (200,000,000) | (52,000,000) | (1,454,000) | (4,213,000) | (50,648,000) | (4,221,000) | (98,289,000) | (120,000,000) | (175,000,000) | (25,000,000) |  |  |  |  |  |  |  |
Net assets transferred |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 160,073,000 | 160,073,000 |  |  | 160,073,000 |  |  |  | 160,073,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Non-cash charges for the write-off and write-down of property under construction and related assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (48,000) | (27,000) | 290,000 | 54,000 | 10,965,000 |  |  |  |  | 10,000,000 |  |  |  | 15,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Employee related costs including severance, retention and outplacement |  |  |  |  |  | 147,000 | 647,000 | 500,000 | 1,500,000 |  |  |  |  |  |  |  |  |  | 10,000 | (641,000) | (123,000) | 2,462,000 | 14,139,000 |  |  |  | 13,000,000 |  |  |  | 16,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Charges for the impairment and decomissioning of various operating assets |  |  |  |  |  | (3,495,000) | 8,719,000 | 8,000,000 | 12,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Contract termination costs |  |  |  |  |  | 11,042,000 | 11,450,000 | 10,000,000 | 15,000,000 |  |  |  |  |  |  |  |  |  | (9,040,000) | 2,176,000 | 21,793,000 | 18,781,000 | 81,377,000 |  |  |  |  | 70,000,000 |  |  |  | 100,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Transaction costs |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 156,000 | 362,000 | 618,000 | 4,081,000 | 6,183,000 |  |  |  | 5,000,000 |  |  |  | 7,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total (Gain) loss on sale of business and other exit costs, net | (4,790,000) | (1,534,000) | (9,079,000) | (297,637,000) |  | 7,694,000 | 20,816,000 | 18,500,000 | 28,500,000 |  |  |  |  |  | (10,283,000) | (1,534,000) | (27,694,000) | (243,627,000) | (10,376,000) | (2,343,000) | (28,070,000) | (298,770,000) | (305,552,000) |  |  |  |  | (341,927,000) |  |  |  | (356,927,000) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Incremental depreciation, amortization and accretion, net of salvage values | 205,529,000 | 255,295,000 | 635,015,000 | 751,575,000 |  |  |  |  |  |  |  |  |  |  | 148,952,000 | 200,985,000 | 465,042,000 | 593,410,000 | 3,582,000 | 45,676,000 | 16,667,000 | 134,000,000 | 215,238,000 |  |  |  | 215,000,000 |  |  |  | 216,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Balance Sheet rollforward |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Balance, beginning of period |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 2,053,000 |  | 13,992,000 |  | 30,849,000 |  |  |
Costs incurred |  |  |  |  |  |  |  |  |  | 647,000 |  | 7,475,000 |  | 3,975,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 99,000 |  | 12,703,000 |  | 24,171,000 |  | 4,018,000 |
Cash settlements |  |  |  |  |  |  |  |  |  | (247,000) | [1] | (1,770,000) | [1] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (1,121,000) | [2] | (19,390,000) | [2] | (3,380,000) | [2] |  |
Adjustments |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (221,000) | [3] | 1,367,000 | [3] | (29,707,000) | [3] | (1,070,000) | [3]
Balance, end of period |  |  |  |  |  |  |  |  |  | $ 400,000 |  | $ 5,705,000 |  | $ 3,975,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 810,000 |  | $ 8,672,000 |  | $ 21,933,000 |  | $ 2,948,000 |
[1] | Cash settlement amounts are included in either the Net income or changes in Other assets and liabilities line items as part of Cash flows from operating activities on the Consolidated Statement of Cash Flows.
[2] | Cash settlement amounts are included in either the Net income, changes in Accounts payable or changes in Other assets and liabilities line items as part of Cash flows from operating activities on the Consolidated Statement of Cash Flows.
[3] | Adjustment to liability represents changes to previously accrued amounts.

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