Intangible Assets, Key Assumptions (Details)	9 Months Ended
Sep. 30, 2017
U.S. Cellular
Fair Value Inputs
Revenue growth rate	0.80%
Terminal revenue growth rate	2.00%
Discount rate	9.50%
TDS Telecom HMS
Fair Value Inputs
Revenue growth rate	3.80%
Terminal revenue growth rate	2.50%
Discount rate	10.50%

Percentage of assumed growth in revenues, used as an input to measure fair value.

No definition available.

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- References

No definition available.

+ Details

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- Definition

Interest rate used to find the present value of an amount to be paid or received in the future as an input to measure fair value. For example, but not limited to, weighted average cost of capital (WACC), cost of capital, cost of equity and cost of debt.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (bbb)
-URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19207-110258

+ Details

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- Definition

Percentage of assumed long-term growth in revenues, used as an input to measure fair value.

+ References

+ Details

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- Details

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- Details

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