2.2.0.25falsefalse40701 - Disclosure - Inventories (Narrative) (Details)truefalseIn Millionsfalse1falsefalseUSDfalsefalse1/1/2010 - 12/31/2010
USD ($) / shares
USD ($)
$Duration_1_1_2010_To_12_31_2010http://www.sec.gov/CIK0000936468duration2010-01-01T00:00:002010-12-31T00:00:00Unit13Dividehttp://www.xbrl.org/2003/iso4217USDiso4217http://www.xbrl.org/2003/instancesharesxbrli0Unit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170Unit1Standardhttp://www.xbrl.org/2003/instancesharesxbrli0Unit14Standardhttp://www.xbrl.org/2003/instancepurexbrli0USDUSD$2falsefalseUSDfalsefalse1/1/2009 - 12/31/2009
USD ($)
USD ($) / shares
$Duration_1_1_2009_To_12_31_2009http://www.sec.gov/CIK0000936468duration2009-01-01T00:00:002009-12-31T00:00:00Unit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170Unit13Dividehttp://www.xbrl.org/2003/iso4217USDiso4217http://www.xbrl.org/2003/instancesharesxbrli0Unit1Standardhttp://www.xbrl.org/2003/instancesharesxbrli0Unit14Standardhttp://www.xbrl.org/2003/instancepurexbrli0USDUSD$3falsefalseUSDfalsefalse1/1/2008 - 12/31/2008
USD ($)
USD ($) / shares
$Duration_1_1_2008_To_12_31_2008http://www.sec.gov/CIK0000936468duration2008-01-01T00:00:002008-12-31T00:00:00Unit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170Unit13Dividehttp://www.xbrl.org/2003/iso4217USDiso4217http://www.xbrl.org/2003/instancesharesxbrli0Unit14Standardhttp://www.xbrl.org/2003/instancepurexbrli0Unit1Standardhttp://www.xbrl.org/2003/instancesharesxbrli0USDUSD$2true0us-gaap_InventoryNetAbstractus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefa
lsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringNo definition available.falsefalse3false0lmt_GeneralAndAdministrativeCostsInWorkInProcessInventorieslmtfalsedebitinstantGeneral and administrative costs in work-in-process inventories.falsefalsefalsefalsefalse<
IsEquityPrevioslyReportedAsRow>falsefalsefalsefalsefalseverboselabel1truefalsefalse522000000522falsetruefalsefalsefalse2truefalsefalse550000000550falsetruefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryGe
neral and administrative costs in work-in-process inventories.No authoritative reference available.falsefalse4false0us-gaap_GeneralAndAdministrativeCostsInInventoryAmountIncurredus-gaaptruedebitinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse23250000002325falsefalsefalsefalsefalse2truefalsefalse23520000002352falsefalsefalsefalsefalse3truefalsefalse23240000002324falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryIf any general and administrative costs are charged to inventory, state the aggregate amount of the general and administrative costs incurred in each period.Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 02
-Paragraph 6
-Subparagraph b
-Article 5
falsefalse5false0lmt_GeneralAndAdministrativeCostsChargedToCostOfSalesFromInventorieslmtfalsedebitdurationGeneral and administrative costs charged to cost of sales from inventoriesfalsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsefalse23520000002352falsetruefalsefalsefalse2truefalsefalse21080000002108falsetruefalsefalsefalse3truefalsefalse22130000002213falsetruefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryGeneral and administrative costs charged to cost of sales from inventoriesNo authoritative reference available.falsefalse34Inventories (Narrative) (Details) (USD $)MillionsUnKnownUnKnownUnKnownfalsetrue
