2.2.0.25falsefalse40203 - Disclosure - Discontinued Operations (Major Classes of Assets and Liabilities Related to Discontinued Operations and Classified as Held for Sale in the Balance Sheet) (Details)truefalseIn Millionsfalse1falsefalseUSDfalsefalse12/31/2010 USD ($) USD ($) / shares $As_Of_12_31_2010http://www.sec.gov/CIK0000936468instant2010-12-31T00:00:000001-01-01T00:00:00Unit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170Unit1Standardhttp://www.xbrl.org/2003/instancesharesxbrli0Unit13Divide http://www.xbrl.org/2003/iso4217USDiso4217http://www.xbrl.org/2003/instancesharesxbrli0Unit14Standardhttp://www.xbrl.org/2003/instancepurexbrli0USDUSD$3true0us-gaap_AssetsOfDisposalGroupIncludingDiscontinuedOperationAbstractu s-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringNo definition available.falsefalse4false0us-gaap_DisposalGroupIncludingDiscontinuedOperationAccountsNotesAndLoansReceivableNetus-gaaptruedebitinstantNo definition available.falsefalsefalsefalsefalse falsefalsefalsefalsefalseverboselabel1truefalsefalse267000000267falsetruefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryFor the disposal group, including a component of the entity (discontinued operation), the aggregate of amounts due from customers or clients for goods or services that have been delivered or sold in the normal course of business and an amount representing an agreement for an unconditional promise by the maker to pay the entity (holder) a definite sum of money at a future date, reduced to their estimated net realizable fair value by an allowance established by the entity of the amount it deems uncertain of collection and net of any write-downs taken for collection uncertainty on the part of the holder, respectively.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 144 -Paragraph 47 -Subparagraph a falsefalse5false0lmt_DisposalGroupIncludingDiscontinuedOperationGoodwillAndOtherIntangibleAssetslmtfalsedebitinstantFor the disposal group, including a component of the entity (discontinued operation), the carrying amount as of the balance...falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1truefalsefalse132000000132falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryFor the disposal group, including a component of the entity (discontinued operation), the carrying amount as of the balance sheet date of goodwill and other intangible assets.No authoritative reference available.falsefalse6false0us-gaap_AssetsOfDisposalGroupIncludingDiscontinuedOperationCurrentus-gaaptruedebitinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalsetotallabel1truefalsefalse399000000399falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe aggregate value (measured at the lower of net carrying value or fair value less cost of disposal) for current assets (assets with expected useful life shorter than one year or one operating cycle, whichever is longer) of a disposal group, including a component of the entity (discontinued operation), to be sold or that has subsequently been disposed of through sale, a s of the financial statement date.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 144 -Paragraph 46 truefalse7true0us-gaap_LiabilitiesOfDisposalGroupIncludingDiscontinuedOperationAbstractus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringNo definition available.falsefalse8false0us-gaap_AccountsPayableAndAccruedLiabilitiesCurrentus-gaaptruecreditinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsefalse122000000122falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryAccounts Payable and Accrued Liabilities, CurrentReference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19, 20 -Article 5 falsefalse9false0us-gaap_DisposalGroupIncludingDiscontinuedOperationOtherLiabilitiesus-gaaptruecreditinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsefalse8200000082falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryFor the disposal group, including a component of the entity (discontinued operation), obligations not otherwise itemized.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 144 -Paragraph 47 -Subparagraph a falsefalse10false0us-gaap_LiabilitiesOfDisposalGroupIncludingDiscontinuedOperationCurrentus-gaaptruecreditinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalsetotallabel1truefalsefalse204000000204falsetruefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryCarrying value as of the balance sheet date of current obligations (due less than one year or one operating cycle, if longer) arising from the sale, disposal or planned sale in the near future (generally within one year) of a disposal group, including a component of the entity (discontinued operation).Reference 1: http://ww w.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 144 -Paragraph 46 truefalse18Discontinued Operations (Major Classes of Assets and Liabilities Related to Discontinued Operations and Classified as Held for Sale in the Balance Sheet) (Details) (USD $)MillionsUnKnownUnKnownUnKnownfalsetrue