XML 61 R49.htm IDEA: XBRL DOCUMENT
v3.21.2

OTHER - Lockheed Martin Ventures Fund (Details) - USD ($) $ / shares in Units, $ in Millions | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 27, 2021 | Jun. 27, 2021 | Dec. 31, 2020
Accounting Policies [Abstract] |  |  |
Carrying amount of investments held in Lockheed Martin Venture Fund | $ 240 | $ 240 | $ 173
Realized gain reflected in other non-operating income | 14 | 82 |
Realized gain recognized for changes in fair value, net of tax | $ 11 | $ 62 |
Realized gain recognized for changes in fair value, net of tax (in dollars per share) | $ 0.04 | $ 0.22 |

X
- Definition Equity Securities, FV-NI, Realized Gain (Loss), Net of Tax + References No definition available. + Details
Name: | lmt_EquitySecuritiesFVNIRealizedGainLossNetOfTax
Namespace Prefix: | lmt_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Equity Securities, FV-NI, Realized Gain (Loss), Net of Tax, Amount Per Share + References No definition available. + Details
Name: | lmt_EquitySecuritiesFVNIRealizedGainLossNetOfTaxAmountPerShare
Namespace Prefix: | lmt_
Data Type: | dtr-types:perShareItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_AccountingPoliciesAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of realized gain (loss) from sale of investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI). + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 321 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=123583765&loc=SL75117546-209714 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 220 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-04(3)(d)) -URI http://asc.fasb.org/extlink&oid=120400993&loc=SL114874131-224263 + Details
Name: | us-gaap_EquitySecuritiesFvNiRealizedGainLoss
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of investment in equity security without readily determinable fair value. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 321 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=123583765&loc=SL75117539-209714 + Details
Name: | us-gaap_EquitySecuritiesWithoutReadilyDeterminableFairValueAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant