2.4.0.82412401 - Disclosure - Income Taxes (Details)truefalsefalse1false USDfalsefalseD2013Q2YTDhttp://www.sec.gov/CIK0001065049duration2013-01-01T00:00:002013-06-30T00:00:00numberStandardhttp://www.xbrl.org/2003/instancepurexbrli0usdStandardhttp://www.xbrl.org/2003/iso4217USDiso42170$2false USDtruefalseD2013Q2YTD_us-gaap_IncomeTaxAuthorityAxis_us-gaap_InternalRevenueServiceIRSMemberhttp://www.sec.gov/CIK0001065049duration2013-01-01T00:00:002013-06-30T00:00:00falsefalseInternal Revenue Service (IRS) [Member]us-gaap_IncomeTaxAuthorityAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_InternalRevenueServiceIRSMemberus-gaap_IncomeTaxAuthorityAxisexplicitMemberusdStandardhttp://www.xbrl.org/2003/iso4217USDiso42170$3false USDtruefalseD2013Q2YTD_us-gaap_IncomeTaxAuthorityAxis_us-gaap_StateAndLocalJurisdictionMemberhttp://www.sec.gov/CIK0001065049duration2013-01-01T00:00:002013-06-30T00:00:00falsefalseState and Local Jurisdiction [Member]us-gaap_IncomeTaxAuthorityAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_StateAndLocalJurisdictionMemberus-gaap_IncomeTaxAuthorityAxisexplicitMemberusdStandardhttp://www.xbrl.org/2003/iso4217USDiso42170$4false truefalseD2013Q2_us-gaap_IncomeTaxAuthorityAxis_us-gaap_StateAndLocalJurisdictionMember_us-gaap_RangeAxis_us-gaap_MinimumMemberhttp://www.sec.gov/CIK0001065049duration2013-04-01T00:00:002013-06-30T00:00:00falsefalseState and Local Jurisdiction [Member]us-gaap_IncomeTaxAuthorityAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_StateAndLocalJurisdictionMemberus-gaap_IncomeTaxAuthorityAxisexplicitMemberfalsefalseMinimum [Member]us-gaap_RangeAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_MinimumMemberus-gaap_RangeAxisexplicitMember5false truefalseD2013Q2_us-gaap_IncomeTaxAuthorityAxis_us-gaap_StateAndLocalJurisdictionMember_us-gaap_RangeAxis_us-gaap_MaximumMemberhttp://www.sec.gov/CIK0001065049duration2013-04-01T00:00:002013-06-30T00:00:00falsefalseState and Local Jurisdiction [Member]us-gaap_IncomeTaxAuthorityAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_StateAndLocalJurisdictionMemberus-gaap_IncomeTaxAuthorityAxisexplicitMemberfalsefalseMaximum [Member]us-gaap_RangeAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_MaximumMemberus-gaap_RangeAxisexplicitMember6false USDtruefalse$I2013Q2_us-gaap_IncomeTaxAuthorityAxis_leap_TexasMarginsTaxMemberhttp://www.sec.gov/CIK0001065049instant2013-06-30T00:00:000001-01-01T00:00:00falsefalseTexas Margins Tax [Member]us-gaap_IncomeTaxAuthorityAxisxbrldihttp://xbrl.org/2006/xbrldileap_TexasMarginsTaxMemberus-gaap_IncomeTaxAuthorityAxisexplicitMemberusdStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$1true 4us-gaap_OperatingLossCarryforwardsLineItemsus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalse5falsefalsefalse00falsefalsefalse6falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse0Operating Loss Carryforwards [Line Items]2false 5leap_DeferredTaxAssetsOperatingLossCarryforwardsTaxEffectleap_falsedebitinstantfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalse5falsefalsefalse00falsefalsefalse6truefalsefalse19000001900000USD$falsetruefalsexbrli:monetaryItemTypemonetaryDeferred Tax Assets, Operating Loss Carryforwards, Tax Effect.No definition available.false2Deferred tax assets, operating loss carryforwards, tax effect3false 5leap_NetOperatingLossCarryforwardExpirationPeriodleap_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse0020 yearsfalsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse005 yearsfalsefalsefalse5falsefalsefalse0020 yearsfalsefalsefalse6falsefalsefalse00falsefalsefalsexbrli:durationItemTypenaNet Operating Loss Carryforward Expiration PeriodNo definition available.false0Operating loss carryforwad period4false 5us-gaap_OperatingLossCarryforwardsus-gaap_truedebitinstantfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2truefalsefalse29000000002900000000falsefalsefalse3truefalsefalse22000000002200000000falsefalsefalse4falsefalsefalse00falsefalsefalse5falsefalsefalse00falsefalsefalse6falsefalsefalse00falsefalsefalsexbrli:monetaryItemTypemonetaryThe sum of domestic, foreign and state and local operating loss carryforwards, before tax effects, available to reduce future taxable income under enacted tax laws.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32559-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 48 -Subparagraph a -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. false2Net operating loss carryforwards5false 5us-gaap_OperatingLossCarryforwardsExpirationDatesus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse002022falsefalsefalse3falsefalsefalse002013falsefalsefalse4falsefalsefalse00falsefalsefalse5falsefalsefalse00falsefalsefalse6falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringThe expiration date of each operating loss carryforward included in total operating loss carryforwards, or the applicable range of such expiration dates.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32559-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 48 -Subparagraph a -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. false0Net operating loss carryforwards, expiration dates6false 5leap_OperatingLossCarryforwardsAmountExpiringInCurrentYearleap_falsedebitinstantfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3truefalsefalse6980000069800000falsefalsefalse4falsefalsefalse00falsefalsefalse5falsefalsefalse00falsefalsefalse6falsefalsefalse00falsefalsefalsexbrli:monetaryItemTypemonetaryOperating Loss Carryforwards, Amount Expiring in Current Year.No definition available.false2Net operating loss carryforwards, amount expiring in current year7false 5us-gaap_DeferredTaxAssetsOperatingLossCarryforwardsus-gaap_truedebitinstantfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse11000000001100000000USD$falsetruefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalse5falsefalsefalse00falsefalsefalse6falsefalsefalse00falsefalsefalsexbrli:monetaryItemTypemonetaryAmount before allocation of valuation allowances of deferred tax asset attributable to deductible operating loss carryforwards.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32621-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 43, 289 -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 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32632-109319 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 25 -Paragraph 20 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6969291&loc=d3e28680-109314 false2Potential reduction in future cash tax liabilities8false 5leap_OperatingLossCarryforwardLimitationsOnUseOwnershipChangeAmountleap_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truetruefalse0.50.5falsefalsefalse2falsetruefalse00falsefalsefalse3falsetruefalse00falsefalsefalse4falsetruefalse00falsefalsefalse5falsetruefalse00falsefalsefalse6falsetruefalse00falsefalsefalsenum:percentItemTypepureOperating Loss Carryforward Limitations on Use Ownership Change AmountNo definition available.false0Net operating loss carryforward limitations on use, ownership change amount (as a percentage)9false 5leap_OperatingLossCarryforwardLimitationsOnUseOwnershipChangeSignificantStockholderOwnershipPercentageleap_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truetruefalse0.050.05falsefalsefalse2falsetruefalse00falsefalsefalse3falsetruefalse00falsefalsefalse4falsetruefalse00falsefalsefalse5falsetruefalse00falsefalsefalse6falsetruefalse00falsefalsefalsenum:percentItemTypepureOperating Loss Carryforward Limitations on Use Ownership Change Significant Stockholder Ownership PercentageNo definition available.false0Net operating loss carryforward limitations on use, ownership change significant stockholder ownership (as a percentage)10false 5leap_OperatingLossCarryforwardLimitationsOnUsePeriodForChangeInControlleap_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse33falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalse5falsefalsefalse00falsefalsefalse6falsefalsefalse00falsefalsefalsexbrli:integerItemTypeintegerOperating Loss Carryforward Limitations on Use Period For Change in ControlNo definition available.false0Net operating loss carryforward limitation on use, period for change in control11false 5leap_OperatingLossCarryforwardLimitationsOnUseOwnershipChangeOwnershipThresholdUnderTaxBenefitPreservationPlanleap_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truetruefalse0.04990.0499falsefalsefalse2falsetruefalse00falsefalsefalse3falsetruefalse00falsefalsefalse4falsetruefalse00falsefalsefalse5falsetruefalse00falsefalsefalse6falsetruefalse00falsefalsefalsenum:percentItemTypepureOperating Loss Carryforward Limitations on Use Ownership Change Ownership Threshold for Change in ControlNo definition available.false0Net operating loss carryforward limitations on use, ownership threshold under tax benefit preservation plan (as a percentage)falseIncome Taxes (Details) (USD $)NoRoundingUnKnownUnKnownUnKnowntruefalsefalseSheethttp://www.leapwireless.com/role/IncomeTaxesDetails611