v3.26.1
Master Trust - Master Trust Balance (Details) - EBP 017 - USD ($)
$ in Thousands
Dec. 31, 2025
Dec. 31, 2024
EBP, Master Trust [Line Items]    
Accrued expenses $ (5,494) $ (5,823)
Total net assets available for benefits 55,427,658 51,442,801
Accrual variance 7,800 (7,600)
Participant- Directed Investments     
EBP, Master Trust [Line Items]    
Total investment assets at fair value 1,700 1,500
Accrued expenses (5,494) (5,823)
Total net assets available for benefits 47,144,842 42,698,980
Master Trust Balance    
EBP, Master Trust [Line Items]    
Total investment assets at fair value 55,496,381 50,978,328
Fully benefit-responsive investment contracts at contract value 4,887,387 4,991,458
Due from broker for securities sold 23,298 5,003
Accrued interest and dividends 55,418 39,222
Other receivables 44,842 67,276
Due to broker for securities purchased (47,874) (19,006)
Accrued expenses (50,044) (77,077)
Other payables (296) (26)
Total net assets available for benefits 60,409,112 55,985,178
Master Trust Balance | Cash and cash equivalents and short-term investment fund    
EBP, Master Trust [Line Items]    
Total investment assets at fair value 675,098 724,303
Master Trust Balance | Common and preferred stocks    
EBP, Master Trust [Line Items]    
Total investment assets at fair value 8,447,158 6,934,489
Master Trust Balance | Common stocks - Lockheed Martin    
EBP, Master Trust [Line Items]    
Total investment assets at fair value 11,373,758 12,097,506
Master Trust Balance | Common/collective trusts    
EBP, Master Trust [Line Items]    
Total investment assets at fair value 28,919,660 26,108,226
Master Trust Balance | Registered investment companies (mutual funds)    
EBP, Master Trust [Line Items]    
Total investment assets at fair value 1,012,735 718,567
Master Trust Balance | Corporate debt securities    
EBP, Master Trust [Line Items]    
Total investment assets at fair value 867,174 755,451
Master Trust Balance | U.S. Government securities    
EBP, Master Trust [Line Items]    
Total investment assets at fair value 662,609 667,026
Master Trust Balance | Other investments    
EBP, Master Trust [Line Items]    
Total investment assets at fair value 148,008 130,680
Master Trust Balance | Self-directed brokerage account    
EBP, Master Trust [Line Items]    
Total investment assets at fair value 3,390,181 2,842,080
Plan’s Interest in Master Trust Balance    
EBP, Master Trust [Line Items]    
Total investment assets at fair value 50,778,883 46,691,665
Fully benefit-responsive investment contracts at contract value 4,374,595 4,482,556
Due from broker for securities sold 21,277 4,575
Accrued interest and dividends 50,610 35,862
Other receivables 40,952 61,512
Due to broker for securities purchased (43,721) (17,378)
Accrued expenses (45,703) (70,473)
Other payables (270) (24)
Total net assets available for benefits 55,176,623 51,188,295
Plan’s Interest in Master Trust Balance | Cash and cash equivalents and short-term investment fund    
EBP, Master Trust [Line Items]    
Total investment assets at fair value 606,689 651,587
Plan’s Interest in Master Trust Balance | Common and preferred stocks    
EBP, Master Trust [Line Items]    
Total investment assets at fair value 7,605,598 6,232,879
Plan’s Interest in Master Trust Balance | Common stocks - Lockheed Martin    
EBP, Master Trust [Line Items]    
Total investment assets at fair value 10,589,182 11,258,467
Plan’s Interest in Master Trust Balance | Common/collective trusts    
EBP, Master Trust [Line Items]    
Total investment assets at fair value 26,380,818 23,842,794
Plan’s Interest in Master Trust Balance | Registered investment companies (mutual funds)    
EBP, Master Trust [Line Items]    
Total investment assets at fair value 909,319 646,229
Plan’s Interest in Master Trust Balance | Corporate debt securities    
EBP, Master Trust [Line Items]    
Total investment assets at fair value 779,955 679,812
Plan’s Interest in Master Trust Balance | U.S. Government securities    
EBP, Master Trust [Line Items]    
Total investment assets at fair value 594,991 599,901
Plan’s Interest in Master Trust Balance | Other investments    
EBP, Master Trust [Line Items]    
Total investment assets at fair value 133,163 117,723
Plan’s Interest in Master Trust Balance | Self-directed brokerage account    
EBP, Master Trust [Line Items]    
Total investment assets at fair value $ 3,179,168 $ 2,662,273