1.0.0.3 false Statement Of Income (USD $) In Millions, except Per Share data 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_SalesRevenueNetAbstract 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_SalesRevenueGoodsNet us-gaap true credit duration monetary No definition available. false false false false false false false false false 1 true true 36336000000 36336 false false 2 true true 34809000000 34809 false false 3 true true 35267000000 35267 false false No definition available. No authoritative reference available. false 7 4 us-gaap_SalesRevenueServicesNet us-gaap true credit duration monetary No definition available. false false false false false false false false false 1 false true 8853000000 8853 false false 2 false true 7922000000 7922 false false 3 false true 6595000000 6595 false false No definition available. No authoritative reference available. false 8 4 us-gaap_SalesRevenueNet us-gaap true credit duration monetary No definition available. false false false false false false false false false 1 false true 45189000000 45189 false false 2 false true 42731000000 42731 false false 3 false true 41862000000 41862 false false No definition available. No authoritative reference available. true 9 3 us-gaap_CostOfGoodsAndServicesSoldAbstract 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 10 4 us-gaap_CostOfGoodsSold us-gaap true debit duration monetary No definition available. false false false false false false false false false 1 false true -32301000000 -32301 false false 2 false true -30874000000 -30874 false false 3 false true -31479000000 -31479 false false No definition available. No authoritative reference available. false 11 4 us-gaap_CostOfServices us-gaap true debit duration monetary No definition available. false false false false false false false false false 1 false true -7993000000 -7993 false false 2 false true -7147000000 -7147 false false 3 false true -5874000000 -5874 false false No definition available. No authoritative reference available. false 12 4 us-gaap_OtherCostAndExpenseOperating us-gaap true debit duration monetary No definition available. false false false false false false false false false 1 false true -671000000 -671 false false 2 false true -61000000 -61 false false 3 false true -275000000 -275 false false No definition available. No authoritative reference available. false 13 4 us-gaap_CostOfGoodsAndServicesSold us-gaap true debit duration monetary No definition available. false false false false false false false false false 1 false true -40965000000 -40965 false false 2 false true -38082000000 -38082 false false 3 false true -37628000000 -37628 false false No definition available. No authoritative reference available. true 14 3 us-gaap_GrossProfit us-gaap true credit duration monetary No definition available. false false false false false false false false false 1 false true 4224000000 4224 false false 2 false true 4649000000 4649 false false 3 false true 4234000000 4234 false false No definition available. No authoritative reference available. true 15 3 lmt_OtherOperatingIncomeExpense lmt false credit duration monetary The total amount of other operating income and expenses, not previously categorized, from items that are associated with the... false false false false false false false false false 1 false true 242000000 242 false false 2 false true 482000000 482 false false 3 false true 293000000 293 false false The total amount of other operating income and expenses, not previously categorized, from items that are associated with the entity's normal revenue producing operation. No authoritative reference available. false 16 3 us-gaap_OperatingIncomeLoss us-gaap true credit duration monetary No definition available. false false false false false false false false false 1 false true 4466000000 4466 false false 2 false true 5131000000 5131 false false 3 false true 4527000000 4527 false false No definition available. No authoritative reference available. true 17 3 us-gaap_InterestExpense us-gaap true debit duration monetary No definition available. false false false false false false false false false 1 false true -305000000 -305 false false 2 false true -341000000 -341 false false 3 false true -352000000 -352 false false No definition available. No authoritative reference available. false 18 3 us-gaap_OtherNonoperatingIncomeExpense us-gaap true credit duration monetary No definition available. false false false false false false false false false 1 false true 123000000 123 false false 2 false true -88000000 -88 false false 3 false true 193000000 193 false false No definition available. No authoritative reference available. false 19 3 lmt_IncomeLossFromContinuingOperationsBeforeIncomeTaxes lmt false credit duration monetary Sum of operating profit and nonoperating income (expense) before income taxes, extraordinary items, and cummulative effects... false false false false false false false false false 1 false true 4284000000 4284 false false 2 false true 4702000000 4702 false false 3 false true 4368000000 4368 false false Sum of operating profit and nonoperating income (expense) before income taxes, extraordinary items, and cummulative effects of changes in accounting principles. No authoritative reference available. true 20 3 us-gaap_IncomeTaxExpenseBenefit us-gaap true debit duration monetary No definition available. false false false false false false false false false 1 false true -1260000000 -1260 false false 2 false true -1485000000 -1485 false false 3 false true -1335000000 -1335 false false No definition available. No authoritative reference available. false 21 3 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. true 22 3 us-gaap_EarningsPerShareAbstract 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 23 4 us-gaap_EarningsPerShareBasic us-gaap true na duration decimal No definition available. false false false false false false false false true 1 true true 7.86 7.86 false false 2 true true 8.05 8.05 false false 3 true true 7.29 7.29 false false No definition available. No authoritative reference available. false 24 4 us-gaap_EarningsPerShareDiluted us-gaap true na duration decimal No definition available. false false false false false false false false true 1 true true 7.78 7.78 false false 2 true true 7.86 7.86 false false 3 true true 7.10 7.10 false false No definition available. No authoritative reference available. false false 3 20 false Millions UnKnown Hundreds false true