1.0.0.3 false Statement Of Shareholders Equity And Other Comprehensive Income (Parenthetical) (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_CommonStockDividendsPerShareDeclared us-gaap true na duration decimal No definition available. false false false false false false false false true 1 true true 2.34 2.34 false false 2 true true 1.83 1.83 false false 3 true true 1.47 1.47 false false No definition available. No authoritative reference available. false 6 3 lmt_OtherComprehensiveIncomePostretirementBenefitPlansUnrecognizedAmountsTax lmt false debit duration monetary Tax effects of the actuarial gains (losses) due to differences between actual experience and actuarial assumptions, and prior... false false false false false false false false false 1 true true -121000000 -121 false false 2 true true 4011000000 4011 false false 3 true true -840000000 -840 false false Tax effects of the actuarial gains (losses) due to differences between actual experience and actuarial assumptions, and prior service credits (costs) from improvements or reductions in plan benefits, each of which occurred during the year and were recognized as a component of other comprehensive income (loss) at the end of the year. No authoritative reference available. false 7 3 lmt_OtherComprehensiveIncomePostretirementBenefitPlansReclassificationAdjustmentForRecognitionOfPriorPeriodAmountsTax lmt false debit duration monetary Tax effects of amounts that were amortized as a component of expense for the year and are no longer included in accumulated... false false false false false false false false false 1 false true 158000000 158 false false 2 false true 25000000 25 false false 3 false true 98000000 98 false false Tax effects of amounts that were amortized as a component of expense for the year and are no longer included in accumulated other comprehensive income (loss) as of the end of the year. No authoritative reference available. false 8 3 lmt_OtherComprehensiveIncomeOtherTax lmt false credit duration monetary Tax effect on the adjustment for other components of other comprehensive income not separately disclosed, including deferred... false false false false false false false false false 1 true true 13000000 13 false false 2 true true 16000000 16 false false 3 true true 7000000 7 false false Tax effect on the adjustment for other components of other comprehensive income not separately disclosed, including deferred gains (losses) on qualifying hedges and unrealized holding gains (losses) on available-for-sale securities. No authoritative reference available. false false 3 4 false Millions UnKnown Hundreds false true