Wireless Licenses and Goodwill	12 Months Ended
Wireless Licenses and Goodwill	Dec. 31, 2013
Goodwill and Intangible Assets Disclosure [Abstract]
Wireless Licenses and Goodwill	Wireless Licenses and Goodwill Wireless Licenses As of December 31, 2013 and 2012, the carrying value of the Company's wireless licenses (excluding assets held for sale) was $2.1 billion and $1.9 billion, respectively. Wireless licenses to be disposed of by sale are carried at the lower of their carrying value or fair value less costs to sell. As of December 31, 2013, no wireless licenses were classified as assets held for sale. As of December 31, 2012, wireless licenses with carrying values and fair values of $136.2 million and $143.0 million, respectively, were classified as assets held for sale. For purposes of testing impairment, the Company's wireless licenses in its operating markets are combined into a single unit of account because management believes that utilizing these wireless licenses as a group represents the highest and best use of the assets, and the value of the wireless licenses would not be significantly impacted by a sale of one or a portion of the wireless licenses, among other factors. The Company's non-operating licenses are tested for impairment on an individual basis because these licenses are not functioning as part of a group with licenses in the Company's operating markets. As of December 31, 2013, the carrying values of the Company's operating and non-operating wireless licenses were $2,047.4 million and $43.9 million, respectively. In accordance with ASU 2012-02, for the 2013 annual impairment test, the Company elected to perform a qualitative assessment to determine whether it would be more likely than not that its wireless licenses were impaired. The Company considered a variety of relevant events and circumstances that could affect the significant inputs used to determine fair value, most specifically, how the values of wireless licenses have generally increased over time. No adverse events or circumstances were identified that would significantly affect the fair values of the Company's wireless licenses. As a result, the Company determined that it was more likely than not that its wireless licenses were not impaired, and therefore, the Company concluded that a quantitative impairment test was not necessary. Subsequent to the 2013 annual impairment test of its wireless licenses, the Company evaluated whether any triggering events or changes in circumstances occurred that indicated that an impairment condition may exist. This evaluation included consideration of whether there had been any significant adverse change in legal factors or in the Company's business climate, any adverse action or assessment by a regulator, unanticipated competition, loss of key personal or likely sale or disposal of all or a significant portion of an asset group. Based upon this evaluation, the Company concluded that no triggering events or changes in circumstances had occurred. In connection with the Company's 2012 annual impairment test, the aggregate fair value and carrying value of its operating wireless licenses (excluding assets held for sale) were $2,415.0 million and $1,745.7 million, respectively, as of September 30, 2012. No impairment charges were recorded during the years ended December 31, 2012 or 2011 with respect to the Company's operating wireless licenses as the aggregate fair value of these licenses exceeded their aggregate carrying value as of such dates. If the fair value of the Company's operating wireless licenses had declined by 10%, the Company would not have recognized any impairment loss. In connection with the Company's 2012 annual impairment test, the aggregate fair value and carrying value of its non-operating wireless licenses (excluding assets held for sale) were $77.9 million and $42.6 million, respectively, as of September 30, 2012. The Company did not record any impairment charges during the year ended December 31, 2012 to reduce the carrying value of any non-operating wireless license to its estimated fair value. If the fair value of the Company's non-operating wireless licenses had each declined by 10%, it would have recognized an impairment loss of approximately $0.1 million. The Company recorded an impairment charge of $0.4 million during the year ended December 31, 2011 to reduce the carrying values of certain non-operating wireless licenses to their estimated fair values. Goodwill The Company records the excess of the purchase price over the fair value of net assets acquired in a business combination as goodwill. As of December 31, 2013 and 2012, goodwill of $31.9 million primarily represented the excess of the purchase price over the fair values of the assets acquired (net of liabilities assumed, including the related deferred tax effects) by STX Wireless from Pocket in connection with the formation of the joint venture. During the third quarter of each year, the Company assesses its goodwill for impairment at the reporting unit level by applying a fair value test. This fair value test involves a two-step process. The first step is to compare the carrying value of the Company's net assets to their fair value. If the fair value is determined to be less than carrying value, a second step is performed to measure the amount of the impairment, if any. In connection with the Company's annual impairment testing of goodwill in 2013, management based the determination of fair value primarily upon its average market capitalization for the month of August 2013, which inherently included an assumed control premium due to the proposed Merger with AT&T. Average market capitalization is calculated based upon the average number of shares of Leap common stock outstanding during such month and the average closing price of Leap common stock during such month. The Company considered the month of August to be an appropriate period over which to measure average market capitalization in 2013 because trading prices during that period reflected market reaction to the Company's most recently announced financial and operating results, as well as the proposed Merger. As of December 31, 2013, the carrying value of the Company's goodwill was $31.9 million. Based upon the Company's annual impairment test conducted during the third quarter of 2013, the value of the Company's net assets as of August 31, 2013 was $58.4 million and the fair value of the Company, based upon its average market capitalization during the month of August, was $1,267.1 million. As such, the Company determined that no impairment condition existed and that it was not required to perform the second step of the goodwill impairment test. In the fourth quarter of 2013, the Company evaluated whether any triggering events or changes in circumstances had occurred subsequent to the annual impairment test conducted in the third quarter of 2013. As part of this evaluation, the Company considered whether there had been any events or circumstances that would indicate it was more likely than not that the Company’s carrying value exceeded its fair value. Based on this evaluation, the Company determined that there had not been any triggering events or changes in circumstances that indicated an impairment condition existed as of December 31, 2013. Had the Company concluded that a triggering event had occurred as of such date, the first step of the goodwill impairment test would have resulted in a determination that the fair value of the Company (based upon its average market capitalization in the month of December, which included an assumed control premium due to the proposed Merger) exceeded the carrying value of its net assets, and thus, the Company would not have been required to perform any further impairment evaluation. Based upon the Company’s annual impairment test conducted during the third quarter of 2012, the value of its net assets as of August 31, 2012 was $527.5 million and the fair value of the Company, based upon its average market capitalization during the month of August and an assumed control premium of 30%, was $573.5 million. The Company believes that consideration of a control premium is customary in determining fair value and is contemplated by the applicable accounting guidance. The Company believes that its consideration of a control premium was appropriate because it believes that its market capitalization did not fully capture the fair value of its business as a whole or the additional amount an assumed purchaser would pay to obtain a controlling interest in the Company. The Company determined the amount of the control premium as part of its third quarter 2012 testing based upon relevant transactional experience and an assessment of market, economic and other factors. As such, the Company determined that no impairment condition existed and that it was not required to perform the second step of the goodwill impairment test.

The entire disclosure for the aggregate amount of goodwill and a description of intangible assets, which may include (a) for amortizable intangible assets (also referred to as finite-lived intangible assets), the carrying amount, the amount of any significant residual value, and the weighted-average amortization period, (b) for intangible assets not subject to amortization (also referred to as indefinite-lived intangible assets), the carrying amount, and (c) the amount of research and development assets acquired and written off in the period, including the line item in the income statement in which the amounts written off are aggregated, if not readily apparent from the income statement. Also discloses (a) for amortizable intangibles assets in total and by major class, the gross carrying amount and accumulated amortization, the total amortization expense for the period, and the estimated aggregate amortization expense for each of the five succeeding fiscal years, (b) for intangible assets not subject to amortization the carrying amount in total and by major class, and (c) for goodwill, in total and for each reportable segment, the changes in the carrying amount of goodwill during the period (including the aggregate amount of goodwill acquired, the aggregate amount of impairment losses recognized, and the amount of goodwill included in the gain (loss) on disposal of a reporting unit). If any part of goodwill has not been allocated to a reportable segment, discloses the unallocated amount and the reasons for not allocating. For each impairment loss recognized related to an intangible asset (excluding goodwill), discloses: (a) a description of the impaired intangible asset and the facts and circumstances leading to the impairment, (b) the amount of the impairment loss and the method for determining fair value, (c) the caption in the income statement or the statement of activities in which the impairment loss is aggregated, and (d) the segment in which the impaired intangible asset is reported. For each goodwill impairment loss recognized, discloses: (a) a description of the facts and circumstances leading to the impairment, (b) the amount of the impairment loss and the method of determining the fair value of the associated reporting unit, and (c) if a recognized impairment loss is an estimate not finalized and the reasons why the estimate is not final. May also disclose the nature and amount of any significant adjustments made to a previous estimate of an impairment loss.

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