1.0.0.3 false Statement Of Cash Flows Indirect (USD $) In Millions false 1 $ false false iso4217_USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 iso4217_USD_per_shares Divide http://www.xbrl.org/2003/iso4217 USD iso4217 http://www.xbrl.org/2003/instance shares 0 false 2 $ false false iso4217_USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 iso4217_USD_per_shares Divide http://www.xbrl.org/2003/iso4217 USD iso4217 http://www.xbrl.org/2003/instance shares 0 false 3 $ false false iso4217_USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 iso4217_USD_per_shares Divide http://www.xbrl.org/2003/iso4217 USD iso4217 http://www.xbrl.org/2003/instance shares 0 5 3 us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract us-gaap true na duration string No definition available. false false false false false true false false false 1 false false 0 0 false false 2 false false 0 0 false false 3 false false 0 0 false false No definition available. false 6 4 us-gaap_NetIncomeLoss us-gaap true credit duration monetary No definition available. false false false false false false false false false 1 true true 3024000000 3024 false false 2 true true 3217000000 3217 false false 3 true true 3033000000 3033 false false No definition available. No authoritative reference available. false 7 4 us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract us-gaap true na duration string No definition available. false false false false false true false false false 1 false false 0 0 false false 2 false false 0 0 false false 3 false false 0 0 false false No definition available. false 8 5 us-gaap_Depreciation us-gaap true debit duration monetary No definition available. false false false false false false false false false 1 false true 750000000 750 false false 2 false true 727000000 727 false false 3 false true 666000000 666 false false No definition available. No authoritative reference available. false 9 5 us-gaap_AmortizationOfIntangibleAssets us-gaap true debit duration monetary No definition available. false false false false false false false false false 1 false true 104000000 104 false false 2 false true 118000000 118 false false 3 false true 153000000 153 false false No definition available. No authoritative reference available. false 10 5 us-gaap_ShareBasedCompensation us-gaap true debit duration monetary No definition available. false false false false false false false false false 1 false true 154000000 154 false false 2 false true 155000000 155 false false 3 false true 149000000 149 false false No definition available. No authoritative reference available. false 11 5 us-gaap_ExcessTaxBenefitFromShareBasedCompensationOperatingActivities us-gaap true credit duration monetary No definition available. false false false false false false false false false 1 false true -21000000 -21 false false 2 false true -92000000 -92 false false 3 false true -124000000 -124 false false No definition available. No authoritative reference available. false 12 5 us-gaap_DeferredIncomeTaxExpenseBenefit us-gaap true debit duration monetary No definition available. false false false false false false false false false 1 false true 542000000 542 false false 2 false true 72000000 72 false false 3 false true 110000000 110 false false No definition available. No authoritative reference available. false 13 5 lmt_QualifiedDefinedBenefitPlanContributionsByEmployer lmt false credit duration monetary The amount of cash or cash equivalents contributed by the entity to fund its qualified defined benefit plans. false false false false false false false false false 1 false true -1482000000 -1482 false false 2 false true -109000000 -109 false false 3 false true -335000000 -335 false false The amount of cash or cash equivalents contributed by the entity to fund its qualified defined benefit plans. No authoritative reference available. false 14 5 us-gaap_IncreaseDecreaseInOperatingCapitalAbstract us-gaap true na duration string No definition available. false false false false false true false false false 1 false false 0 0 false false 2 false false 0 0 false false 3 false false 0 0 false false No definition available. false 15 6 us-gaap_IncreaseDecreaseInReceivables us-gaap true credit duration monetary No definition available. false false false false false false false false false 1 false true -719000000 -719 false false 2 false true -333000000 -333 false false 3 false true -324000000 -324 false false No definition available. No authoritative reference available. false 16 6 us-gaap_IncreaseDecreaseInInventories us-gaap true credit duration monetary No definition available. false false false false false false false false false 1 false true -233000000 -233 false false 2 false true -183000000 -183 false false 3 false true -57000000 -57 false false No definition available. No authoritative reference available. false 17 6 us-gaap_IncreaseDecreaseInAccountsPayable us-gaap true debit duration monetary No definition available. false false false false false false false false false 1 false true -21000000 -21 false false 2 false true -141000000 -141 false false 3 false true -66000000 -66 false false No definition available. No authoritative reference available. false 18 6 us-gaap_IncreaseDecreaseInCustomerAdvances us-gaap true debit duration monetary No definition available. false false false false false false false false false 1 false true 482000000 482 false false 2 false true 313000000 313 false false 3 false true 394000000 394 false false No definition available. No authoritative reference available. false 19 6 us-gaap_IncreaseDecreaseInOtherOperatingCapitalNet us-gaap true credit duration monetary No definition available. false false false false false false false false false 1 false true 593000000 593 false false 2 false true 677000000 677 false false 3 false true 639000000 639 false false No definition available. No authoritative reference available. false 20 4 us-gaap_NetCashProvidedByUsedInOperatingActivities us-gaap true na duration monetary No definition available. false false false false false false false false false 1 false true 3173000000 3173 false false 2 false true 4421000000 4421 false false 3 false true 4238000000 4238 false false No definition available. No authoritative reference available. true 21 3 us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract us-gaap true na duration string No definition available. false false false false false true false false false 1 false false 0 0 false false 2 false false 0 0 false false 3 false false 0 0 false false No definition available. false 22 4 us-gaap_PaymentsToAcquirePropertyPlantAndEquipment us-gaap true credit duration monetary No definition available. false false false false false false false false false 1 false true -852000000 -852 false false 2 false true -926000000 -926 false false 3 false true -940000000 -940 false false No definition available. No authoritative reference available. false 23 4 us-gaap_PaymentsToAcquireBusinessesAndInterestInAffiliates us-gaap true credit duration monetary No definition available. false false false false false false false false false 1 false true -435000000 -435 false false 2 false true -233000000 -233 false false 3 false true -337000000 -337 false false No definition available. No authoritative reference available. false 24 4 us-gaap_PaymentsForProceedsFromInvestments us-gaap true credit duration monetary No definition available. false false false false false false false false false 1 false true -279000000 -279 false false 2 false true 272000000 272 false false 3 false true 48000000 48 false false No definition available. No authoritative reference available. false 25 4 us-gaap_PaymentsForProceedsFromOtherInvestingActivities us-gaap true credit duration monetary No definition available. false false false false false false false false false 1 false true 48000000 48 false false 2 false true -20000000 -20 false false 3 false true 24000000 24 false false No definition available. No authoritative reference available. false 26 4 us-gaap_NetCashProvidedByUsedInInvestingActivities us-gaap true debit duration monetary No definition available. false false false false false false false false false 1 false true -1518000000 -1518 false false 2 false true -907000000 -907 false false 3 false true -1205000000 -1205 false false No definition available. No authoritative reference available. true 27 3 us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract us-gaap true na duration string No definition available. false false false false false true false false false 1 false false 0 0 false false 2 false false 0 0 false false 3 false false 0 0 false false No definition available. false 28 4 us-gaap_PaymentsForRepurchaseOfCommonStock us-gaap true credit duration monetary No definition available. false false false false false false false false false 1 false true -1851000000 -1851 false false 2 false true -2931000000 -2931 false false 3 false true -2127000000 -2127 false false No definition available. No authoritative reference available. false 29 4 us-gaap_ProceedsFromIssuanceOfCommonStock us-gaap true debit duration monetary No definition available. false false false false false false false false false 1 false true 40000000 40 false false 2 false true 250000000 250 false false 3 false true 350000000 350 false false No definition available. No authoritative reference available. false 30 4 us-gaap_ExcessTaxBenefitFromShareBasedCompensationFinancingActivities us-gaap true debit duration monetary No definition available. false false false false false false false false false 1 false true 21000000 21 false false 2 false true 92000000 92 false false 3 false true 124000000 124 false false No definition available. No authoritative reference available. false 31 4 us-gaap_PaymentsOfDividendsCommonStock us-gaap true credit duration monetary No definition available. false false false false false false false false false 1 false true -908000000 -908 false false 2 false true -737000000 -737 false false 3 false true -615000000 -615 false false No definition available. No authoritative reference available. false 32 4 us-gaap_ProceedsFromIssuanceOfLongTermDebt us-gaap true debit duration monetary No definition available. false false false false false false false false false 1 false true 1464000000 1464 false false 2 false true 491000000 491 false false 3 false true 0 0 false false No definition available. No authoritative reference available. false 33 4 us-gaap_RepaymentsOfLongTermDebt us-gaap true credit duration monetary No definition available. false false false false false false false false false 1 false true -242000000 -242 false false 2 false true -1103000000 -1103 false false 3 false true -32000000 -32 false false No definition available. No authoritative reference available. false 34 4 us-gaap_NetCashProvidedByUsedInFinancingActivities us-gaap true debit duration monetary No definition available. false false false false false false false false false 1 false true -1476000000 -1476 false false 2 false true -3938000000 -3938 false false 3 false true -2300000000 -2300 false false No definition available. No authoritative reference available. true 35 3 us-gaap_EffectOfExchangeRateOnCashAndCashEquivalents us-gaap true debit duration monetary No definition available. false false false false false false false false false 1 false true 44000000 44 false false 2 false true -56000000 -56 false false 3 false true 3000000 3 false false No definition available. No authoritative reference available. false 36 3 us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease us-gaap true na duration monetary No definition available. false false false false false false false false false 1 false true 223000000 223 false false 2 false true -480000000 -480 false false 3 false true 736000000 736 false false No definition available. No authoritative reference available. true 37 3 us-gaap_CashAndCashEquivalentsAtCarryingValue us-gaap true debit instant monetary No definition available. false false false false false false true false false 1 false true 2168000000 2168 false false 2 false true 2648000000 2648 false false 3 false true 1912000000 1912 false false No definition available. No authoritative reference available. false 38 3 us-gaap_CashAndCashEquivalentsAtCarryingValue us-gaap true debit instant monetary No definition available. false false false false false false false true false 1 true true 2391000000 2391 false false 2 true true 2168000000 2168 false false 3 true true 2648000000 2648 false false No definition available. No authoritative reference available. false false 3 34 false Millions UnKnown UnKnown false true