Impairment of Intangible Assets, Indefinite-lived (Excluding Goodwill), Assuming Ten Percent Decline in Fair Value.

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Namespace Prefix:	leap
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- Definition

The amount of impairment loss recognized in the period resulting from the write-down of the carrying amount of an indefinite-lived intangible asset, other than goodwill, to fair value.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 142

-Paragraph 46

-Subparagraph b

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 30

-Section 50

-Paragraph 3

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=6905858&loc=d3e16373-109275

+ Details

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Data Type:	xbrli:monetaryItemType
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Period Type:	duration

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ Details

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Balance Type:	na
Period Type:	duration

- Definition

This element represents various capitalized rights and intangible assets, excluding goodwill, having a projected indefinite period of benefit.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 157

-Paragraph 33

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

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Namespace Prefix:	us-gaap
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Carrying amount (original costs adjusted for previously recognized amortization and impairment) as of the balance sheet date for the capitalized costs to acquire rights under a license arrangement (for example, to sell specified products in a specified territory) having an indefinite period of benefit.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 142

-Paragraph 45

-Subparagraph b

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 30

-Section 50

-Paragraph 2

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=6905858&loc=d3e16323-109275

+ Details

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Balance Type:	debit
Period Type:	instant

Basis of Presentation and Significant Accounting Policies - Intangible Assets (Details) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010	Dec. 31, 2010
Indefinite-lived Intangible Assets by Major Class [Line Items]
Indefinite-Lived License Agreements	$ 1,940,824,000		$ 1,940,824,000		$ 1,968,075,000
Impairment of Intangible Assets	377,000	766,000	377,000	766,000
Operating Wireless Licenses [Member]
Indefinite-lived Intangible Assets by Major Class [Line Items]
Indefinite-Lived License Agreements	1,778,600,000		1,778,600,000
Wireless licenses fair value	2,453,000,000		2,453,000,000
Impairment of Intangible Assets Assuming 10% Decline in Fair Value	0
Impairment of Intangible Assets	0	0	0	0
Non-operating Wireless Licenses [Member]
Indefinite-lived Intangible Assets by Major Class [Line Items]
Indefinite-Lived License Agreements	162,200,000		162,200,000
Wireless licenses fair value	246,800,000		246,800,000
Impairment of Intangible Assets Assuming 10% Decline in Fair Value	2,200,000
Impairment of Intangible Assets	$ 400,000		$ 400,000	$ 800,000