v3.26.1
Master Trust - Master Trust Balance (Details) - EBP 033 - USD ($)
$ in Thousands
Dec. 31, 2025
Dec. 31, 2024
EBP, Master Trust [Line Items]    
Accrued expenses $ (39) $ (44)
Total net assets available for benefits 394,999 389,108
Accrual variance 4,400 (3,700)
Participant- Directed Investments     
EBP, Master Trust [Line Items]    
Total investment assets at fair value 1,700 1,500
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 359,456 348,289
Fully benefit-responsive investment contracts at contract value 38,606 35,583
Due from broker for securities sold 154 34
Accrued interest and dividends 368 269
Other receivables 297 461
Due to broker for securities purchased (318) (130)
Accrued expenses (332) (529)
Other payables (2) 0
Total net assets available for benefits 398,229 383,977
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 5,168 5,772
Plan’s Interest in Master Trust Balance | Common and preferred stocks    
EBP, Master Trust [Line Items]    
Total investment assets at fair value 60,254 51,552
Plan’s Interest in Master Trust Balance | Common stocks - Lockheed Martin    
EBP, Master Trust [Line Items]    
Total investment assets at fair value 73,180 81,029
Plan’s Interest in Master Trust Balance | Common/collective trusts    
EBP, Master Trust [Line Items]    
Total investment assets at fair value 185,983 178,224
Plan’s Interest in Master Trust Balance | Registered investment companies (mutual funds)    
EBP, Master Trust [Line Items]    
Total investment assets at fair value 10,610 8,666
Plan’s Interest in Master Trust Balance | Corporate debt securities    
EBP, Master Trust [Line Items]    
Total investment assets at fair value 8,729 8,418
Plan’s Interest in Master Trust Balance | U.S. Government securities    
EBP, Master Trust [Line Items]    
Total investment assets at fair value 6,141 6,589
Plan’s Interest in Master Trust Balance | Other investments    
EBP, Master Trust [Line Items]    
Total investment assets at fair value 1,521 1,464
Plan’s Interest in Master Trust Balance | Self-directed brokerage account    
EBP, Master Trust [Line Items]    
Total investment assets at fair value $ 7,870 $ 6,575