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true true false false 228000000 228000000 true false false 2 true true false false 144000000 144000000 true false false 3 false false false false 0 0 true false false 4 true true false false 323000000 323000000 true false false 5 false false false false 0 0 true false false 6 false false false false 0 0 true false false 7 false false false false 0 0 true false false 8 false false false false 0 0 true false false 9 false false false false 0 0 true false false 10 false false false false 0 0 true false false 11 false false false false 0 0 true false false 12 false false false false 0 0 true false false 13 false false false false 0 0 true false false 14 false false false false 0 0 true false false 15 false false false false 0 0 true false false 16 false false false false 0 0 true false false xbrli:monetaryItemType monetary Total contract value. 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Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Statement of Position (SOP) -Number 90-7 -Paragraph 26 false 9 Assets Total relative to environmental costs eligible for future recovery 3 lmt_EnvironmentalAssetsDeemedRecoverable lmt false debit instant Environmental costs eligible for future recovery. false false false false false false false false false false false false 1 false false false false 0 0 true false false 2 false false false false 0 0 true false false 3 false false false false 0 0 true false false 4 false false false false 0 0 true false false 5 false false false false 0 0 true false false 6 false false false false 0 0 true false false 7 false false false false 0 0 true false false 8 false false false false 0 0 true false false 9 false true false false 714000000 714000000 true false false 10 false true false false 630000000 630000000 true false false 11 false true false false 825000000 825000000 true false false 12 false true false false 740000000 740000000 true false false 13 false false false false 0 0 true false false 14 false false false false 0 0 true false false 15 false false false false 0 0 true false false 16 false false false false 0 0 true false false xbrli:monetaryItemType monetary Environmental costs eligible for future recovery. No authoritative reference available. false 10 Percentage of expenditures for certain remediation activities 3 lmt_PercentageOfEnvironmentalRemediationCostsReimbursed lmt false na duration Approximate percentage of costs to be reimbursed for environmental remediation activities at two California sites per... false false false false false false false false false false false false 1 false false false false 0 0 true false false 2 false false false false 0 0 true false false 3 false false false false 0 0 true false false 4 false false false false 0 0 true false false 5 false true false false 0.5 0.5 true false false 6 false false false false 0 0 true false false 7 false false false false 0 0 true false false 8 false false false false 0 0 true false false 9 false false false false 0 0 true false false 10 false false false false 0 0 true false false 11 false false false false 0 0 true false false 12 false false false false 0 0 true false false 13 false false false false 0 0 true false false 14 false false false false 0 0 true false false 15 false false false false 0 0 true false false 16 false false false false 0 0 true false false us-types:percentItemType pure Approximate percentage of costs to be reimbursed for environmental remediation activities at two California sites per agreement. No authoritative reference available. false 11 Outstanding letters of credit, surety bonds and other arrangements 3 lmt_LettersOfCreditSuretyBondsAndOtherArrangements lmt false credit instant Outstanding letters of credit, surety bonds, and other arrangements. false false false false false false false false false false false false 1 false false false false 0 0 true false false 2 false false false false 0 0 true false false 3 false false false false 0 0 true false false 4 false false false false 0 0 true false false 5 false false false false 0 0 true false false 6 false false false false 0 0 true false false 7 false false false false 0 0 true false false 8 false false false false 0 0 true false false 9 false false false false 0 0 true false false 10 false false false false 0 0 true false false 11 false false false false 0 0 true false false 12 false false false false 0 0 true false false 13 false true false false 3700000000 3700000000 true false false 14 false true false false 3600000000 3600000000 true false false 15 false false false false 0 0 true false false 16 false false false false 0 0 true false false xbrli:monetaryItemType monetary Outstanding letters of credit, surety bonds, and other arrangements. 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No authoritative reference available. false 16 10 false NoRounding UnKnown UnKnown false true