2.2.0.25truefalse40601 - Disclosure - Receivables (Schedule of Receivables by Component) (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$2falsefalseUSDfalsefalse12/31/2009 USD ($) USD ($) / shares $As_Of_12_31_2009http://www.sec.gov/CIK0000936468instant2009-12-31T00:00:000001-01-01T00:00:00Unit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170Unit13Dividehttp://www.xbrl.org/2003/iso4217USDiso4217http://www.xbrl.org/2003/instancesharesxbrli0Unit1Standardhttp://www.xbrl.org/2003/instancesharesxbrli0USDUSD$2false0us-gaap_CustomerAdvancesAndDepositsus-gaaptruecreditinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsetruenegated1truefalsefalse-5719000000-5719falsetruefalsefalsefalse2truefalsefalse-504 9000000-5049falsetruefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryRefundable consideration, usually cash, held by the entity pending satisfactory completion of the entity's obligations or pending the closing of a contract.No authoritative reference available.falsefalse3false0us-gaap_R eceivablesNetCurrentus-gaaptruedebitinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalsetotallabel1truefalsefalse57570000005757falsefalsefalsefalsefalse2truefalsefalse60610000006061falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe total amount due to the entity within one year of the balance sheet date (or one operating cycle , if longer) from outside sources, including trade accounts receivable, notes and loans receivable, as well as any other types of receivables, net of allowances established for the purpose of reducing such receivables to an amount that approximates their net realizable value.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 4 -Article 5 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 3 -Subparagraph a -Article 5 truefalse4false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://www.lockheedmartin.com/taxonomy/role/disclosurereceivablesscheduleofreceivablesbycomponentdetails1false falsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse< Id>3falsefalseUSDtruefalse{us-gaap_AccountsNotesLoansAndFinancingReceivablesByIndustryOfCounterpartyTypeAxis} : U.S. Government [Member] 12/31/2010 USD ($) $As_Of_12_31_20103http://www.sec.gov/CIK0000936468instant2010-12-31T00:00:000001-01-01T00:00:00falsefalseU.S. Government [Member]us-gaap_AccountsNotesLoansAndFinancingReceivablesByIndustryOfCounterpartyTypeAxisxbrldihttp://xbrl.org/2006/xbrldilmt_USGovernmentMemberus-gaap_AccountsNotesLoansAndFinancingReceivablesByIndustryOfCounterpartyTypeAxisexplicitMemberUnit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$4falsefalseUSDtruefalse{us-gaap_AccountsNotesLoansAndFinancingReceivablesByIndustryOfCounterpartyTypeAxis} : U.S. Government [Member] 12/31/2009 USD ($) $As_Of_12_31_20092http://www.sec.gov/CIK0000936468instant2009-12-31T00:00:000001-01-01T00:00:00falsefalseU.S. Government [Member]us-gaap_AccountsNotesLoansAndFinancingReceivablesByIndustryOfCounterpartyTypeAxisxbrldihttp://xbrl.org/2006/xbrldilmt_USGovernmentMemberus-gaap_AccountsNotesLoansAndFinancingReceivablesByIndustryOfCounterpartyTypeAxisexplicitMemberUnit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$OthernaNo definition available.No authoritative reference available.falsefalse5false0us-gaap_BilledContractReceivablesus-gaaptruedebit instantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse13600000001360falsefalsefalsefals efalse2truefalsefalse16480000001648falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryAmounts due for billed services rendered or to be rendered, actions taken or to be taken, or a promise to refrain from taking certain actions in accordance with the terms of a legally binding agreement between the Company and, at a minimum, one other party. An example would be amounts billed to customers under contracts or programs but not paid as of the balance sheet date.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 3 -Article 5 falsefalse6false0us-gaap_UnbilledContractsReceivableus-gaaptruedebitinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse31270000003127falsefalsefalsefalsefalse2truefalsefalse27180000002718falsefalsefalsefalsefalseMonetaryxbrli:monet aryItemTypemonetaryUnbilled amounts due for services rendered or to be rendered, actions taken or to be taken, or a promise to refrain from taking certain actions in accordance with the terms of a legally binding agreement between the entity and, at a minimum, one other party. An example would be amounts associated with contracts or programs where the recognized revenue for performance thereunder exceeds the amounts billed under the terms thereof as of the date of the balance sheet.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 3 -Subparagraph c(3) -Article 5 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 43 -Chapter 11 -Section A -Paragraph 4, 21 falsefalse7false0lmt_CustomerAdvancesAndProgressPaymentslmtfalsecreditinstantPrepayments received from customers for goods or services to be provided in the future and liabilities due to billings on...falsefalsefalsefalsefalsefalsefalsefalsefalsetruenegated1truefalsefalse-591000000-591falsefalsefalsefalsefalse2truefalsefalse-486000000-486falsefalsefalsefal sefalseMonetaryxbrli:monetaryItemTypemonetaryPrepayments received from customers for goods or services to be provided in the future and liabilities due to billings on long term contracts that exceed the income recorded under the percentage of completion contract accounting method.No authoritative reference available.falsefalse8false0us-gaap_ReceivablesNetCurrentus-gaaptruedebitinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalsetotallabel1truefalsefalse38960000003896falsefalsefalsefalsefalse2truefalsefalse38800000003880falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe total amount due to the entity within one year of the balance sheet date (or one operating cycle, if longer) from outside sources, including trade accounts receivable, notes and loans receivable, as well as any other types of receivables, net of allowances established for the purpose of reducing such receivables to an amount t hat approximates their net realizable value.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 4 -Article 5 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 3 -Subparagraph a -Article 5 truefalse9false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://www.lockheedmartin.com/taxonomy/role/disclosurereceivablesscheduleofreceivablesbycomponentdetails1false falsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse< Id>5falsefalseUSDtruefalse{us-gaap_AccountsNotesLoansAndFinancingReceivablesByIndustryOfCounterpartyTypeAxis} : Foreign Governments [Member] 12/31/2010 USD ($) $As_Of_12_31_201015http://www.sec.gov/CIK0000936468instant2010-12-31T00:00:000001-01-01T00:00:00falsefalseForeign Governments [Member]us-gaap_AccountsNotesLoansAndFinancingReceivablesByIndustryOfCounterpartyTypeAxisxbrldihttp://xbrl.org/2006/xbrldilmt_ForeignGovernmentMemberus-gaap_AccountsNotesLoansAndFinancingReceivablesByIndustryOfCounterpartyTypeAxisexplicitMemberUnit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$6falsefalseUSDtruefalse{us-gaap_AccountsNotesLoansAndFinancingReceivablesByIndustryOfCounterpartyTypeAxis} : Foreign Governments [Member] 12/31/2009 USD ($) $As_Of_12_31_200913http://www.sec.gov/CIK0000936468instant2009-12-31T00:00:000001-01-01T00:00:00falsefalseForeign Governments [Member]us-gaap_AccountsNotesLoansAndFinancingReceivablesByIndustryOfCounterpartyTypeAxisxbrldihttp://xbrl.org/2006/xbrldilmt_ForeignGovernmentMemberus-gaap_AccountsNotesLoansAndFinancingReceivablesByIndustryOfCounterpartyTypeAxisexplicitMemberUnit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$OthernaNo definition available.No authoritative reference available.falsefalse10false0us-gaap_BilledContractReceivablesus-gaaptrue debitinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse461000000461falsefalsefalse falsefalse2truefalsefalse598000000598falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryAmounts due for billed services rendered or to be rendered, actions taken or to be taken, or a promise to refrain from taking certain actions in accordance with the terms of a legally binding agreement between the Company and, at a minimum, one other pa rty. An example would be amounts billed to customers under contracts or programs but not paid as of the balance sheet date.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 3 -Article 5 falsefalse11false0us-gaap_UnbilledContractsReceivableus-gaaptruedebitinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse16490000001649falsefalsefalsefalsefalse2truefalsefalse18110000001811falsefalsefalsefalsefalseMonetaryxbrli:mone taryItemTypemonetaryUnbilled amounts due for services rendered or to be rendered, actions taken or to be taken, or a promise to refrain from taking certain actions in accordance with the terms of a legally binding agreement between the entity and, at a minimum, one other party. An example would be amounts associated with contracts or programs where the recognized revenue for performance thereunder exceeds the amounts billed under the terms thereof as of the date of the balance sheet.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 3 -Subparagraph c(3) -Article 5 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 43 -Chapter 11 -Section A -Paragraph 4, 21 falsefalse12false0us-gaap_CustomerAdvancesAndDepositsus-gaaptruecreditinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsetruenegated1truefalsefalse-249000000-249falsefalsefalsefalsefalse2truefalsefalse-228000000-228falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryRefundable consideration, usually cash, held by the entity pending satisfactory completion of the entity's obligations or pending the closing of a contract.No authoritative reference available.falsefalse13false0us-gaap_ReceivablesNetCurrentus-gaaptruedebitinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalsetotallabel1truefalsefalse18610000001861falsetruefalsefalsefalse2truefalsefalse21810000002181falsetruefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe total amount due to the entity within one year of the balance sheet date (or one operating cycle, if longer) from outside sources, including trade accounts receivable, notes and loans receivable, as well as any other types of receivables, net of allowances established for the purpose of reducing such receivables to an amount that approximates their net realizable value.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 4 -Article 5 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 3 -Subparagraph a -Article 5 truefalse212Receivables (Schedule of Receivables by Component) (Details) (USD $)MillionsUnKnownUnKnownUnKnownfalsetrue