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LOCKHEED MARTIN CORP

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2.2.0.25truefalse41106 - Disclosure - Postretirement Benefit Plans (Actuarial Assumptions for Discount Rates Used to Measure Benefit Obligations Related to Postretirement Benefit Plans) (Details)truefalsefalse1falsefalsetruefalse{us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis} : Benefit Obligation [Member] 12/31/2010 As_Of_12_31_2010229http://www.sec.gov/CIK0000936468instant2010-12-31T00:00:000001-01-01T00:00:00falsefalseBenefit Obligation [Member]us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisxbrldihttp://xbrl.org/2006/xbrldilmt_BenefitObligationMemberus-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisexplicitMemberUnit14Standardhttp://www.xbrl.org/2 003/instancepurexbrli02falsefalsetruefalse{us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis} : Benefit Obligation [Member] 12/31/2009 As_Of_12_31_200917http://www.sec.gov/CIK0000936468instant2009-12-31T00:00:000001-01-01T00:00:00falsefalseBenefit Obligation [Member]us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisxbrldihttp://xbrl.org/2006/xbrldilmt_BenefitObligationMemberus-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisexplicitMemberUnit14Standardhttp://www.xbrl.org/20 03/instancepurexbrli02false0us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRateus-gaaptruenainstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truetruefalse0.0550.055falsefalsefalsefalsefalse2truetruefalse0.058750.05875falsefalsefalsefalsefalseOtherus-types:percentItemTypepureThe interest rate used to adjust for the time value of money for the plan.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 132R -Paragraph 5 -Subparagraph j falsefalse3false0us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationRateOfCompensationIncreaseus-gaaptruenainstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truetruefalse0.0440.044falsefalsefalsefalsefalse2truetruefalse0.0450.045falsefalsefalsefalsefalseOtherus-types:percentItemTypepureExpected rate of compensation increases (for pay-related plans).Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 132R -Paragraph 5 -Subparagraph j falsefalse22Postretirement Benefit Plans (Actuarial Assumptions for Discount Rates Used to Measure Benefit Obligations Related to Postretirement Benefit Plans) (Details) (Benefit Obligation [Member])UnKnownUnKnownUnKnownUnKnowntruetrue