1.0.0.3falseStatement Of Shareholders Equity And Other Comprehensive Income (Parenthetical) (USD $)In Millions, except Per Share datafalse1$falsefalseiso4217_USDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170iso4217_USD_per_sharesDividehttp://www.xbrl.org/2003/iso4217USDiso4217http://www.xbrl.org/2003/instanceshares0false2$falsefalseiso4217_USDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170iso4217_USD_per_sharesDividehttp://www.xbrl.org/2003/iso4217USDiso4217http://www.xbrl.org/2003/instanceshares0false3$falsefalseiso4217_USDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170iso4217_USD_per_sharesDividehttp://www.xbrl.org/2003/iso4217USDiso4217http://www.xbrl.org/2003/instanceshares053us-gaap_CommonStockDividendsPerShareDeclaredus-gaaptruenadurationdecimalNo definition available.falsefalsefalsefalsefalsefalsefalsefalsetrue1truetrue2.342.34falsefalse2truetrue1.831.83falsefalse3truetrue1.471.47falsefalseNo definition available.No authoritative reference available.false63lmt_OtherComprehensiveIncomePostretirementBenefitPlansUnrecognizedAmountsTaxlmtfalsedebitdurationmonetaryTax effects of the actuarial gains (losses) due to differences between actual experience and actuarial assumptions, and prior...falsefalsefalsefalsefalsefalsefalsefalsefalse1truetrue-121000000-121falsefalse2truetrue40110000004011falsefalse3truetrue-840000000-840falsefalseTax 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.false73lmt_OtherComprehensiveIncomePostretirementBenefitPlansReclassificationAdjustmentForRecognitionOfPriorPeriodAmountsTaxlmtfalsedebitdurationmonetaryTax effects of amounts that were amortized as a component of expense for the year and are no longer included in accumulated...falsefalsefalsefalsefalsefalsefalsefalsefalse1falsetrue158000000158falsefalse2falsetrue2500000025falsefalse3falsetrue9800000098falsefalseTax 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.false83lmt_OtherComprehensiveIncomeOtherTaxlmtfalsecreditdurationmonetaryTax effect on the adjustment for other components of other comprehensive income not separately disclosed, including deferred...falsefalsefalsefalsefalsefalsefalsefalsefalse1truetrue1300000013falsefalse2truetrue1600000016falsefalse3truetrue70000007falsefalseTax 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.falsefalse34falseMillionsUnKnownHundredsfalsetrue