2.2.0.25falsefalse40903 - Disclosure - Income Taxes (Reconciliation of Income Tax Expense Computed Using the US Statutory Federal Tax Rate) (Details)truefalseIn Millionsfalse1falsefalseUSDfalsefalse1/1/2010 - 3/31/2010 USD ($) / shares USD ($) $Duration_1_1_2010_To_3_31_2010http://www.sec.gov/CIK0000936468duration2010-01-01T00:00:002010-03-31T00:00:00Unit13Dividehttp://www.xbrl.org/2003/iso4217USDiso4217http://www.xbrl.org/2003/instancesharesxbrli0Unit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$2falsefalseUSDfalsefalse1/1/2010 - 12/31/2010 USD ($) / shares USD ($) $Duration_1_1_2010_To_12_31_2010http://www.sec.gov/CIK0000936468duration2010-01-01T00:00:002010-12-31T00:00:00Unit13Dividehttp://www.xbrl.org/2003/iso4217USDiso4217http://www.xbrl.org/2003/instancesharesxbrli0Unit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170Unit1Standardhttp://www.xbrl.org/2003/instancesharesxbrli0Unit14Standardhttp://www.xbrl.org/2003/instancepurexbrli0USDUSD$3falsefalseUSDfalsefalse1/1/2009 - 12/31/2009 USD ($) USD ($) / shares $Duration_1_1_2009_To_12_31_2009http://www.sec.gov/CIK0000936468duration2009-01-01T00:00:002009-12-31T00:00:00Unit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170Unit13Dividehttp://www.xbrl.org/2003/iso4217USDiso4217http://www.xbrl.org/2003/instancesharesxbrli0Unit1Standardhttp://www.xbrl.org/2003/instancesharesxbrli0Unit14Standardhttp://www.xbrl.org/2003/instancepurexbrli0USDUSD$4falsefalseUSDfalsefalse1/1/2008 - 12/31/2008 USD ($) USD ($) / shares $Duration_1_1_2008_To_12_31_2008http://www.sec.gov/CIK0000936468duration2008-01-01T00:00:002008-12-31T00:00:00Unit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170Unit13Dividehttp://www.xbrl.org/2003/iso4217USDiso4217http://www.xbrl.org/2003/instancesharesxbrli0Unit14Standardhttp://www.xbrl.org/2003/instancepurexbrli0Unit1Standardhttp://www.xbrl.org/2003/instancesharesxbrli0USDUSD$2true0us-gaap_IncomeTaxExpenseBenefitAbstractus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse4falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringNo definition available.falsefalse3false0us-gaap_IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRateus-gaaptruedebitdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalsefalsefalse2truefalsefalse13390000001339falsetruefalsefalsefalse3truefalsefalse14810000001481falsetruefalsefalsefalse4truefalsefalse16190000001619falsetruefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe amount of income t ax expense (benefit) for the period computed by applying the domestic federal statutory tax rates to pretax income from continuing operations.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 47 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 08 -Paragraph h -Subparagraph 2 -Article 4 falsefalse4true0us-gaap_IncomeTaxReconciliationDeductionsAbstractus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1false falsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalse false00falsefalsefalsefalsefalse4falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringNo definition available.falsefalse5false0us-gaap_IncomeTaxReconciliationDeductionsQualifiedProductionActivitiesus-gaaptruecreditdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalse truenegated1falsefalsefalse00falsefalsefalsefalsefalse2truefalsefalse-110000000-110falsefalsefalsefalsefalse3truefalsefalse-39000000-39falsefalsefalsefalsefalse4truefalsefalse-67000000-67falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe portion of the difference between total income tax expense (benefit) as reported in the Income Statement for the period and the expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income from continuing operations attributable to the deduction for qualified production activities received under enacted tax laws.No authoritative reference available.falsefalse6false0lmt_ReductionInNetEarningslmtfalsedebitdurationReduction in Net Earningsfalsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1truefalsefalse9600000096falsefalsefalsefalsefalse2truefalsefalse9600000096falsefalsefalsefalsefalse3falsefalsefalse00false< /IsIndependantCurrency>falsefalsefalsefalse4falsefalsefalse00falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryReduction in Net EarningsNo authoritative reference available.false< /IsTotalLabel>false7false0us-gaap_IncomeTaxReconciliationDeductionsDividendsus-gaaptruecreditdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsetruenegated1falsefalsefalse< /DisplayZeroAsNone>00falsefalsefalsefalsefalse2truefalsefalse-56000000-56falsefalsefalsefalsefalse3truefalsefal se-49000000-49falsefalsefalsefalsefalse4truefalsefalse-38000000-38falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe portion of the difference between total income tax expense (benefit) as reported in the Income Statement for the period and the expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income from continuing operations attributable to the deduction for dividends paid or received under enacted tax laws.No authoritative reference available.falsefalse8false0us-gaap_IncomeTaxReconciliationTaxCreditsResearchus-gaaptruecreditdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsetruenegated1falsefalsefalse00falsefalsefalsefalsefalse2truefalsefalse-43000000-43falsefalsefalsefalsefalse3truefalsefalse-43000000-43falsefalsefalsefalsefalse4 truefalsefalse-36000000-36falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe portion of the difference between total income tax expense (benefit) as reported in the Income Statement and the expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income from continuing operations attributable to research tax credits generated or utilized under enac ted tax laws during the period.No authoritative reference available.falsefalse9false0us-gaap_IncomeTaxReconciliationDeductionsOtherus-gaaptruecreditdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsetruenegated1falsefalsefalse00falsefalsefalsefalsefalse2truefalsefalse-45000000-45falsefalsefalsefalsefalse3truefalsefalse-119000000-119falsefalsefalsefalsefalse4truefalsefalse-19000000-19falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe portion of the difference between total income tax expense (benefit) as reported in the Income Statement for the period and the expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income from continuing operations attributable to other deductions received under enacted tax laws not otherwise listed in the existing taxonomy.No authoritative reference available.falsefalse10false0us-gaap_IncomeTaxExpenseBenefitus-gaaptruedebitdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalsetotallabel1falsefalsefalse00falsefalsefalsefalsefalse2truefalsefalse11810000001181falsetruefalsefalsefalse3truefalsefalse12310000001231falsetruefalsefalsefalse4truefalsefalse14590000001459falsetruefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe sum of the current income tax expense (benefit) and the deferred income tax expense (benefit) pertaining to continuing operations.Referenc e 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 08 -Paragraph h -Article 4 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 45 -Subparagraph a, b truefalse49Income Taxes (Reconciliation of Income Tax Expense Computed Using the US Statutory Federal Tax Rate) (Details) (USD $)MillionsUnKnownUnKnownUnKnownfalsetrue