XML 61 R43.htm IDEA: XBRL DOCUMENT
v3.8.0.1

Significant Accounting Policies - Additional Information (Detail) |  |  | 3 Months Ended | 8 Months Ended | 12 Months Ended | 16 Months Ended
--- | --- | --- | --- | --- | --- | ---
Aug. 24, 2016 | Nov. 06, 2015 USD ($) | Dec. 31, 2017 USD ($) program $ / shares | Sep. 24, 2017 USD ($) $ / shares | Jun. 25, 2017 USD ($) $ / shares | Mar. 26, 2017 USD ($) $ / shares | Dec. 31, 2016 USD ($) $ / shares | Sep. 25, 2016 USD ($) $ / shares | Jun. 26, 2016 USD ($) $ / shares | Mar. 27, 2016 USD ($) $ / shares | Aug. 23, 2016 | Dec. 31, 2017 USD ($) program $ / shares | Dec. 31, 2016 USD ($) $ / shares | Dec. 31, 2015 USD ($) $ / shares | Dec. 31, 2017 USD ($) program
Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Acquisitions of businesses and investments in affiliates |  |  |  |  |  |  |  |  |  |  |  | $ 0 | $ 0 | $ 9,003,000,000 |
Additional charge for performance matter on EADGE-T, gross |  |  |  |  |  | $ 120,000,000 |  |  |  |  |  |  |  |  |
Additional charge for performance matter on EADGE-T, after tax |  |  |  |  |  | $ 74,000,000 |  |  |  |  |  |  |  |  |
Additional charge for performance matter on EADGE-T, after tax (in dollars per share) | $ / shares |  |  |  |  |  | $ 0.25 |  |  |  |  |  |  |  |  |
Cumulative losses, including reserves |  |  |  |  |  |  |  |  |  |  |  | 260,000,000 |  |  |
Operating profit |  |  | $ 1,859,000,000 | $ 1,428,000,000 | $ 1,485,000,000 | $ 1,149,000,000 | $ 1,428,000,000 | $ 1,588,000,000 | $ 1,375,000,000 | $ 1,158,000,000 |  | 5,921,000,000 | 5,549,000,000 | 4,712,000,000 |
Net earnings |  |  | $ (642,000,000) | $ 939,000,000 | $ 942,000,000 | $ 763,000,000 | $ 988,000,000 | $ 2,395,000,000 | $ 1,021,000,000 | $ 898,000,000 |  | $ 2,002,000,000 | $ 5,302,000,000 | $ 3,605,000,000 |
Diluted earnings per share (in dollars per share) | $ / shares |  |  | $ (2.25) | $ 3.24 | $ 3.23 | $ 2.61 | $ 3.35 | $ 7.93 | $ 3.32 | $ 2.91 |  | $ 6.89 | $ 17.49 | $ 11.46 |
Service method, revenue recognition interval |  |  |  |  |  |  |  |  |  |  |  | 6 months |  |  |
Independent research and development costs charged to cost of sales |  |  |  |  |  |  |  |  |  |  |  | $ 1,200,000,000 | $ 988,000,000 | $ 817,000,000 |
Financing receivable, significant sales |  |  |  |  |  |  |  |  |  |  |  | 698,000,000 |  |  |
Gain (loss) on sale of accounts receivable |  |  |  |  |  |  |  |  |  |  |  | 0 |  |  |
Depreciation |  |  |  |  |  |  |  |  |  |  |  | 760,000,000 | 747,000,000 | 716,000,000 |
Capitalized internal-use software, net |  |  | $ 424,000,000 |  |  |  | $ 427,000,000 |  |  |  |  | 424,000,000 | 427,000,000 |  | $ 424,000,000
Capitalized internal-use software accumulated amortization |  |  | 2,000,000,000 |  |  |  | 1,900,000,000 |  |  |  |  | 2,000,000,000 | 1,900,000,000 |  | 2,000,000,000
Goodwill |  |  | 10,807,000,000 |  |  |  | 10,764,000,000 |  |  |  |  | $ 10,807,000,000 | 10,764,000,000 | 10,695,000,000 | 10,807,000,000
Weighted average remaining contractual life, vested |  |  |  |  |  |  |  |  |  |  |  | 3 years |  |  |
Percentage of gains and losses recognition to the extent exciding greater of plan assets or obligations |  |  |  |  |  |  |  |  |  |  |  | 10.00% |  |  |
Average future service period of employees expected to receive benefits under the plans |  |  |  |  |  |  |  |  |  |  |  | 9 years |  |  |
Time period environmental costs and recovery of environmental costs are projected over, years |  |  |  |  |  |  |  |  |  |  |  | 20 years |  |  |
Fair value of trading securities |  |  | 1,400,000,000 |  |  |  | 1,200,000,000 |  |  |  |  | $ 1,400,000,000 | 1,200,000,000 |  | 1,400,000,000
Net gains (losses) on marketable securities |  |  |  |  |  |  |  |  |  |  |  | 150,000,000 | 66,000,000 | (11,000,000) |
Total equity method investments |  |  | 1,400,000,000 |  |  |  | 1,400,000,000 |  |  |  |  | 1,400,000,000 | 1,400,000,000 |  | 1,400,000,000
Net earnings from equity method investments |  |  |  |  |  |  |  |  |  |  |  | 207,000,000 | 443,000,000 | 320,000,000 |
Equity method investee impairment |  |  |  |  |  |  |  |  |  |  |  |  |  | 90,000,000 |
ASC 606 | Scenario, Plan |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cumulative effect of new accounting principle in period of adoption, percent increase in current assets |  |  |  | 2.00% |  |  |  |  |  |  |  |  |  |  |
Cumulative effect of new accounting principle in period of adoption, percent increase in current liabilities |  |  |  | 2.00% |  |  |  |  |  |  |  |  |  |  |
Contracts Accounted for under Percentage of Completion |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Operating profit |  |  |  |  |  |  |  |  |  |  |  | 1,500,000,000 | 1,500,000,000 | 1,700,000,000 |
Net earnings |  |  |  |  |  |  |  |  |  |  |  | $ 980,000,000 | $ 950,000,000 | $ 1,100,000,000 |
Diluted earnings per share (in dollars per share) | $ / shares |  |  |  |  |  |  |  |  |  |  |  | $ 3.37 | $ 3.13 | $ 3.50 |
Minimum |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Acquired finite-lived intangible assets are amortized |  |  |  |  |  |  |  |  |  |  |  | 3 years |  |  |
Minimum | Customer relationships |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Acquired finite-lived intangible assets are amortized |  |  |  |  |  |  |  |  |  |  |  | 4 years |  |  |
Minimum | Customer programs |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Acquired finite-lived intangible assets are amortized |  |  |  |  |  |  |  |  |  |  |  | 9 years |  |  |
Maximum |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Acquired finite-lived intangible assets are amortized |  |  |  |  |  |  |  |  |  |  |  | 20 years |  |  |
Maximum | Customer relationships |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Acquired finite-lived intangible assets are amortized |  |  |  |  |  |  |  |  |  |  |  | 10 years |  |  |
Maximum | Customer programs |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Acquired finite-lived intangible assets are amortized |  |  |  |  |  |  |  |  |  |  |  | 20 years |  |  |
Designated as hedges | Interest rate swaps |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Aggregate notional amount of derivatives |  |  | 1,200,000,000 |  |  |  | 1,200,000,000 |  |  |  |  | $ 1,200,000,000 | $ 1,200,000,000 |  | 1,200,000,000
Designated as hedges | Foreign currency contracts |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Aggregate notional amount of derivatives |  |  | $ 4,100,000,000 |  |  |  | 4,000,000,000 |  |  |  |  | $ 4,100,000,000 | 4,000,000,000 |  | $ 4,100,000,000
Space |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of commercial satellite programs with performance issues | program |  |  | 2 |  |  |  |  |  |  |  |  | 2 |  |  | 2
Goodwill |  |  | $ 1,587,000,000 |  |  |  | 1,585,000,000 |  |  |  |  | $ 1,587,000,000 | 1,585,000,000 | $ 1,588,000,000 | $ 1,587,000,000
Net earnings from equity method investments |  |  |  |  |  |  |  |  |  |  |  | $ 205,000,000 | 325,000,000 | 245,000,000 |
Buildings | Minimum |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Property, plant and equipment, estimated life (years) |  |  |  |  |  |  |  |  |  |  |  | 10 years |  |  |
Buildings | Maximum |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Property, plant and equipment, estimated life (years) |  |  |  |  |  |  |  |  |  |  |  | 40 years |  |  |
Machinery and equipment | Minimum |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Property, plant and equipment, estimated life (years) |  |  |  |  |  |  |  |  |  |  |  | 5 years |  |  |
Machinery and equipment | Maximum |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Property, plant and equipment, estimated life (years) |  |  |  |  |  |  |  |  |  |  |  | 15 years |  |  |
Capitalized Software |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Capitalized internal-use software amortization |  |  |  |  |  |  |  |  |  |  |  | $ 123,000,000 | 136,000,000 | $ 161,000,000 |
Capitalized Software | Minimum |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Property, plant and equipment, estimated life (years) |  |  |  |  |  |  |  |  |  |  |  | 2 years |  |  |
Capitalized Software | Maximum |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Property, plant and equipment, estimated life (years) |  |  |  |  |  |  |  |  |  |  |  | 6 years |  |  |
Operating Profit | Accounting Standards Update 2017-07 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cumulative effect of new accounting principle in period of adoption, increase (decrease) |  |  | 846,000,000 |  |  |  | 471,000,000 |  |  |  |  | $ 846,000,000 | 471,000,000 |  | 846,000,000
Nonoperating Income (Loss) | Accounting Standards Update 2017-07 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cumulative effect of new accounting principle in period of adoption, increase (decrease) |  |  | (846,000,000) |  |  |  | $ (471,000,000) |  |  |  |  | $ (846,000,000) | $ (471,000,000) |  | $ (846,000,000)
AWE Management Limited |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Ownership interest percentage owned immediately before acquisition | 33.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |
Ownership interest percentage owned subsequent acquisition | 51.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |
AWE Management Limited | Customer relationships |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Acquired finite-lived intangible assets are amortized | 8 years |  |  |  |  |  |  |  |  |  |  |  |  |  |
Sikorsky Aircraft Corporation |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Acquisitions of businesses and investments in affiliates |  | $ 9,000,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Goodwill |  | $ 2,842,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Concentration Risk | Net Sales | AWE Management Limited | Space |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Concentration percentage |  |  |  |  |  |  |  |  |  |  |  | 100.00% |  |  | 100.00%
Segment Concentration Risk | Operating profit | AWE Management Limited | Space |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Concentration percentage |  |  |  |  |  |  |  |  |  |  |  | 51.00% |  |  | 51.00%
Equity Method Investment Risk | Net Sales | AWE Management Limited | Space |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Concentration percentage |  |  |  |  |  |  |  |  |  |  |  | 0.00% |  |  |
Equity Method Investment Risk | Net Earnings | AWE Management Limited | Space |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Concentration percentage |  |  |  |  |  |  |  |  |  |  | 33.00% |  |  |  |
LM2100 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Commercial satellite cumulative losses on development |  |  | $ 305,000,000 |  |  |  |  |  |  |  |  | $ 305,000,000 |  |  | $ 305,000,000
Commercial satellite losses on development, after tax |  |  |  |  |  |  |  |  |  |  |  | $ 83,000,000 |  |  |
Commercial satellite losses on development, after tax (in dollars per share) | $ / shares |  |  |  |  |  |  |  |  |  |  |  | $ 0.29 |  |  |
Independent research and development costs charged to cost of sales |  |  |  |  |  |  |  |  |  |  |  | $ 135,000,000 |  |  |
AMMROC |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Equity method investee impairment |  |  |  |  |  | $ 64,000,000 |  |  |  |  |  | $ 64,000,000 |  |  |
Increase in net earnings due to profit rate adjustments |  |  |  |  |  | $ 40,000,000 |  |  |  |  |  |  |  |  |
Increase in diluted earnings per common share due to profit rate adjustments (in dollars per share) | $ / shares |  |  |  |  |  | $ 0.14 |  |  |  |  |  |  |  |  |

X
- Definition Aggregate notional amount specified by the derivative(s). Expressed as an absolute value. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Article 12 -Section 13 -Sentence Column B + Details
Name: | invest_DerivativeNotionalAmount
Namespace Prefix: | invest_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | instant

X
- Definition Actuarial Gains Losses Threshold For Recognition In Net Periodic Benefit Costs Percentage Of Projected Benefit Obligation Or Fair Value Of Plan Assets + References No definition available. + Details
Name: | lmt_ActuarialGainsLossesThresholdForRecognitionInNetPeriodicBenefitCostsPercentageOfProjectedBenefitObligationOrFairValueOfPlanAssets
Namespace Prefix: | lmt_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Accumulated amortization of capitalized internal-use software. + References No definition available. + Details
Name: | lmt_CapitalizedInternalUseSoftwareAccumulatedAmortization
Namespace Prefix: | lmt_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Certain costs capitalized associated with the development or purchase of internal-use software net of accumulated amortization. + References No definition available. + Details
Name: | lmt_CapitalizedInternalUseSoftwareNet
Namespace Prefix: | lmt_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Cumulative Effect Of New Accounting Principle In Period Of Adoption, Percent Increase In Current Assets + References No definition available. + Details
Name: | lmt_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoptionPercentIncreaseInCurrentAssets
Namespace Prefix: | lmt_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Cumulative Effect Of New Accounting Principle In Period Of Adoption, Percent Increase In Current Liabilities + References No definition available. + Details
Name: | lmt_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoptionPercentIncreaseInCurrentLiabilities
Namespace Prefix: | lmt_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Equity method investment other than temporary impairment earnings per share. + References No definition available. + Details
Name: | lmt_EquityMethodInvestmentOtherThanTemporaryImpairmentEarningsPerShare
Namespace Prefix: | lmt_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | duration

X
- Definition Equity method investment other than temporary impairment net of tax. + References No definition available. + Details
Name: | lmt_EquityMethodInvestmentOtherThanTemporaryImpairmentNetOfTax
Namespace Prefix: | lmt_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Estimated Cumulative Losses + References No definition available. + Details
Name: | lmt_EstimatedCumulativeLosses
Namespace Prefix: | lmt_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Estimated cumulative losses including reserves. + References No definition available. + Details
Name: | lmt_EstimatedCumulativeLossesIncludingReserves
Namespace Prefix: | lmt_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Minimum Employee Service Period For Plan Eligibility + References No definition available. + Details
Name: | lmt_MinimumEmployeeServicePeriodForPlanEligibility
Namespace Prefix: | lmt_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number Of Commercial Satellite Programs With Performance Issues + References No definition available. + Details
Name: | lmt_NumberOfCommercialSatelliteProgramsWithPerformanceIssues
Namespace Prefix: | lmt_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Research And Development Expense, After Tax + References No definition available. + Details
Name: | lmt_ResearchAndDevelopmentExpenseAfterTax
Namespace Prefix: | lmt_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Research And Development Expense, After Tax, Per Share + References No definition available. + Details
Name: | lmt_ResearchAndDevelopmentExpenseAfterTaxPerShare
Namespace Prefix: | lmt_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | duration

X
- Definition Revenue Recognition, Service Method, Revenue Recognition Interval + References No definition available. + Details
Name: | lmt_RevenueRecognitionServiceMethodRevenueRecognitionInterval
Namespace Prefix: | lmt_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Significant Accounting Policies [Line Items] + References No definition available. + Details
Name: | lmt_SignificantAccountingPoliciesLineItems
Namespace Prefix: | lmt_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Time period environmental costs and recovery of environmental costs are projected over. + References No definition available. + Details
Name: | lmt_TimePeriodEnvironmentalCostsAndRecoveryOfEnvironmentalCostsAreProjectedOver
Namespace Prefix: | lmt_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Valuation allowances and reserves charged to cost and expense earnings per share. + References No definition available. + Details
Name: | lmt_ValuationAllowancesAndReservesChargedToCostAndExpenseEarningsPerShare
Namespace Prefix: | lmt_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | duration

X
- Definition Valuation allowances and reserves charged to cost and expense, net of tax. + References No definition available. + Details
Name: | lmt_ValuationAllowancesAndReservesChargedToCostAndExpenseNetOfTax
Namespace Prefix: | lmt_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The aggregate amount of recurring noncash expense charged against earnings in the period to allocate the cost of assets over their estimated remaining economic lives. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 + Details
Name: | us-gaap_AdjustmentForAmortization
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Percentage of voting equity interests acquired in a business combination achieved in stages, including equity interests in the acquiree held by the acquirer immediately before the acquisition date and acquired at the acquisition date. + References No definition available. + Details
Name: | us-gaap_BusinessCombinationStepAcquisitionEquityInterestInAcquireeIncludingSubsequentAcquisitionPercentage
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Percentage of equity in the acquiree held by the acquirer immediately before the acquisition date in a business combination. + References No definition available. + Details
Name: | us-gaap_BusinessCombinationStepAcquisitionEquityInterestInAcquireePercentage
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 275 -SubTopic 10 -Section 50 -Paragraph 18 -URI http://asc.fasb.org/extlink&oid=84177426&loc=d3e6351-108592 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=77997519&loc=d3e13531-108611 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 275 -SubTopic 10 -Section 50 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=84177426&loc=d3e6404-108592 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 21 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=77997519&loc=d3e13537-108611 + Details
Name: | us-gaap_ConcentrationRiskPercentage1
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount after tax of increase (decrease) to equity or (increase) decrease to net assets, resulting from the cumulative effect adjustment of a new accounting principle applied in the period of adoption. + References No definition available. + Details
Name: | us-gaap_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The amount of expense recognized in the current period that reflects the allocation of the cost of tangible assets over the assets' useful lives. Includes production and non-production related depreciation. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229 + Details
Name: | us-gaap_Depreciation
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The amount of net income (loss) for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-04(19)) -URI http://asc.fasb.org/extlink&oid=6879464&loc=d3e573970-122913 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=96947427&loc=d3e1252-109256 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03(21)) -URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04(23)) -URI http://asc.fasb.org/extlink&oid=6879574&loc=d3e536633-122882 + Details
Name: | us-gaap_EarningsPerShareDiluted
Namespace Prefix: | us-gaap_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | duration

X
- Definition Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (i) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + Details
Name: | us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition This item represents an other than temporary decline in value that has been recognized against an investment accounted for under the equity method of accounting. The excess of the carrying amount over the fair value of the investment represents the amount of the write down which is or was reflected in earnings. The written down value is a new cost basis with the adjusted value of the investment becoming its new carrying value subject to the equity accounting method. Evidence of a loss in value might include, but would not necessarily be limited to, absence of an ability to recover the carrying amount of the investment or inability of the investee to sustain an earnings capacity which would justify the carrying amount of the investment. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -SubTopic 10 -Section 35 -Paragraph 32 -URI http://asc.fasb.org/extlink&oid=99375318&loc=d3e32787-111569 + Details
Name: | us-gaap_EquityMethodInvestmentOtherThanTemporaryImpairment
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition This item represents the carrying amount on the entity's balance sheet of its investment in common stock of an equity method investee. This is not an indicator of the fair value of the investment, rather it is the initial cost adjusted for the entity's share of earnings and losses of the investee, adjusted for any distributions (dividends) and other than temporary impairment (OTTI) losses recognized. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -SubTopic 10 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=66022249&loc=d3e33749-111570 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.12) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
Name: | us-gaap_EquityMethodInvestments
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The amount of any significant sales of financing receivables during the reporting period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (f) -URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953423-111524 + Details
Name: | us-gaap_FinancingReceivableSignificantSales
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Remaining amortization period of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
Name: | us-gaap_FiniteLivedIntangibleAssetsRemainingAmortizationPeriod1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Reflects the net positive or negative amount derived from subtracting from net proceeds of sale, the carrying amounts, net of allocated reserves, of accounts receivable transferred to a third party in a transaction that qualifies for sales treatment. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 20 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=82924980&loc=d3e107425-111719 + Details
Name: | us-gaap_GainLossOnSaleOfAccountsReceivable
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6388280&loc=d3e13770-109266 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=77989000&loc=SL49117168-202975 + Details
Name: | us-gaap_Goodwill
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition This item represents the entity's proportionate share for the period of the net income (loss) of its investee (such as unconsolidated subsidiaries and joint ventures) to which the equity method of accounting is applied. This item includes income or expense related to stock-based compensation based on the investor's grant of stock to employees of an equity method investee. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03(12)) -URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-04(10)) -URI http://asc.fasb.org/extlink&oid=6879464&loc=d3e573970-122913 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3602-108585 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -SubTopic 10 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=66022249&loc=d3e33749-111570 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04(13)(f)) -URI http://asc.fasb.org/extlink&oid=6879574&loc=d3e536633-122882 + Details
Name: | us-gaap_IncomeLossFromEquityMethodInvestments
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition This item represents the net total realized and unrealized gain (loss) included in earnings for the period as a result of selling or holding marketable securities categorized as trading, available-for-sale, or held-to-maturity, including the unrealized holding gain (loss) of held-to-maturity securities transferred to the trading security category and the cumulative unrealized gain (loss) which was included in other comprehensive income (a separate component of shareholders' equity) for available-for-sale securities transferred to trading securities during the period. Additionally, this item would include any losses recognized for other than temporary impairments (OTTI) of the subject investments in debt and equity securities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 9 -Subparagraph (a),(c)-(e) -URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27357-111563 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.7(c)) -URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 10 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27405-111563 + Details
Name: | us-gaap_MarketableSecuritiesGainLoss
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The portion of profit or loss for the period, net of income taxes, which is attributable to the parent. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04(22)) -URI http://asc.fasb.org/extlink&oid=6879574&loc=d3e536633-122882 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-04(18)) -URI http://asc.fasb.org/extlink&oid=6879464&loc=d3e573970-122913 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03(20)) -URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688 + Details
Name: | us-gaap_NetIncomeLoss
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The net result for the period of deducting operating expenses from operating revenues. + References No definition available. + Details
Name: | us-gaap_OperatingIncomeLoss
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The cash outflow associated with the acquisition of a controlling interest in another entity or an entity that is related to it but not strictly controlled (for example, an unconsolidated subsidiary, affiliate, joint venture or equity method investment). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3213-108585 + Details
Name: | us-gaap_PaymentsToAcquireBusinessesAndInterestInAffiliates
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment. + References No definition available. + Details
Name: | us-gaap_PropertyPlantAndEquipmentUsefulLife
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition The aggregate costs incurred (1) in a planned search or critical investigation aimed at discovery of new knowledge with the hope that such knowledge will be useful in developing a new product or service, a new process or technique, or in bringing about a significant improvement to an existing product or process; or (2) to translate research findings or other knowledge into a plan or design for a new product or process or for a significant improvement to an existing product or process whether intended for sale or the entity's use, during the reporting period charged to research and development projects, including the costs of developing computer software up to the point in time of achieving technological feasibility, and costs allocated in accounting for a business combination to in-process projects deemed to have no alternative future use. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 730 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6420194&loc=d3e21568-108373 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 985 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6501960&loc=d3e128462-111756 + Details
Name: | us-gaap_ResearchAndDevelopmentExpense
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of investments in debt and equity securities and other forms of securities that provide ownership interests classified as trading. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=82896770&loc=d3e26626-111562 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.4) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=82896770&loc=d3e26610-111562 + Details
Name: | us-gaap_TradingSecurities
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of increase in the allowances and reserves, which consist of the valuation and qualifying accounts that are either netted against the cost of an asset or that reflect a liability established to represent expected future costs, from charges to costs and expenses. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 4 -Subparagraph (SX 210.12-09) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e24092-122690 + Details
Name: | us-gaap_ValuationAllowancesAndReservesChargedToCostAndExpense
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Details
Name: | us-gaap_AdjustmentsForNewAccountingPronouncementsAxis=us-gaap_AccountingStandardsUpdate201409Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementScenarioAxis=us-gaap_ScenarioPlanMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ChangeInAccountingEstimateByTypeAxis=us-gaap_ContractsAccountedForUnderPercentageOfCompletionMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RangeAxis=us-gaap_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis=us-gaap_CustomerRelationshipsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis=us-gaap_CustomerContractsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RangeAxis=us-gaap_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_HedgingDesignationAxis=us-gaap_DesignatedAsHedgingInstrumentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=us-gaap_InterestRateSwapMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=us-gaap_ForeignExchangeContractMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=lmt_SpaceSystemsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=us-gaap_BuildingMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=us-gaap_MachineryAndEquipmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=us-gaap_SoftwareAndSoftwareDevelopmentCostsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_IncomeStatementLocationAxis=lmt_OperatingProfitMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ProspectiveAdoptionOfNewAccountingPronouncementsAxis=lmt_AccountingStandardsUpdate201707Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_IncomeStatementLocationAxis=us-gaap_NonoperatingIncomeExpenseMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_BusinessAcquisitionAxis=lmt_AweManagementLimitedMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_BusinessAcquisitionAxis=lmt_SikorskyAircraftCorporationMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ConcentrationRiskByTypeAxis=lmt_SegmentConcentrationRiskMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ConcentrationRiskByBenchmarkAxis=us-gaap_SalesRevenueNetMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ConcentrationRiskByBenchmarkAxis=lmt_OperatingIncomeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ConcentrationRiskByTypeAxis=lmt_InvestmentConcentrationRiskMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ConcentrationRiskByBenchmarkAxis=lmt_NetIncomeLossMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationByPropertyOrProjectAxis=lmt_LM2100ProjectMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis=lmt_AdvancedMilitaryMaintenanceRepairandOverhaulCenterMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |