1.0.0.3 false Entity Information (USD $) 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 shares Standard http://www.xbrl.org/2003/instance shares 0 false 3 $ false false iso4217_USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 5 3 dei_TradingSymbol dei false na duration normalizedstring No definition available. false false false false false false false false false 1 false false 0 0 LMT LMT false false 2 false false 0 0 false false 3 false false 0 0 false false No definition available. No authoritative reference available. false 6 3 dei_EntityRegistrantName dei false na duration normalizedstring No definition available. false false false false false false false false false 1 false false 0 0 LOCKHEED MARTIN CORP LOCKHEED MARTIN CORP false false 2 false false 0 0 false false 3 false false 0 0 false false No definition available. No authoritative reference available. false 7 3 dei_EntityCentralIndexKey dei false na duration na No definition available. false false false false false false false false false 1 false false 0 0 0000936468 0000936468 false false 2 false false 0 0 false false 3 false false 0 0 false false No definition available. No authoritative reference available. false 8 3 dei_CurrentFiscalYearEndDate dei false na duration monthday No definition available. false false false false false false false false false 1 false false 0 0 --12-31 --12-31 false false 2 false false 0 0 false false 3 false false 0 0 false false No definition available. No authoritative reference available. false 9 3 dei_EntityWellKnownSeasonedIssuer dei false na duration na No definition available. false false false false false false false false false 1 false false 0 0 Yes Yes false false 2 false false 0 0 false false 3 false false 0 0 false false No definition available. No authoritative reference available. false 10 3 dei_EntityCurrentReportingStatus dei false na duration na No definition available. false false false false false false false false false 1 false false 0 0 Yes Yes false false 2 false false 0 0 false false 3 false false 0 0 false false No definition available. No authoritative reference available. false 11 3 dei_EntityVoluntaryFilers dei false na duration na No definition available. false false false false false false false false false 1 false false 0 0 No No false false 2 false false 0 0 false false 3 false false 0 0 false false No definition available. No authoritative reference available. false 12 3 dei_EntityFilerCategory dei false na duration na No definition available. false false false false false false false false false 1 false false 0 0 Large Accelerated Filer Large Accelerated Filer false false 2 false false 0 0 false false 3 false false 0 0 false false No definition available. No authoritative reference available. false 13 3 dei_EntityCommonStockSharesOutstanding dei false na instant shares No definition available. false false false false false false false false false 1 false false 0 0 false false 2 false true 375428680 375428680 false false 3 false false 0 0 false false No definition available. No authoritative reference available. false 14 3 dei_EntityPublicFloat dei false credit instant monetary No definition available. false false false false false false false false false 1 false false 0 0 false false 2 false false 0 0 false false 3 true true 30900000000 30900000000 false false No definition available. No authoritative reference available. false false 3 10 false NoRounding NoRounding UnKnown false true