v3.26.1
Master Trust - Master Trust Balance (Details) - EBP 055 - USD ($)
$ in Thousands
Dec. 31, 2025
Dec. 31, 2024
EBP, Master Trust [Line Items]    
Accrued expenses $ (338) $ (338)
Total net assets available for benefits 3,407,757 2,986,853
Accrual variance (15,400) 3,400
Participant- Directed Investments     
EBP, Master Trust [Line Items]    
Total Investments at fair value 1,700 1,500
Master Trust Balance    
EBP, Master Trust [Line Items]    
Total Investments 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 Investments at fair value 675,098 724,303
Master Trust Balance | Common and preferred stocks    
EBP, Master Trust [Line Items]    
Total Investments at fair value 8,447,158 6,934,489
Master Trust Balance | Common stocks - Lockheed Martin    
EBP, Master Trust [Line Items]    
Total Investments at fair value 11,373,758 12,097,506
Master Trust Balance | Common/collective trusts    
EBP, Master Trust [Line Items]    
Total Investments at fair value 28,919,660 26,108,226
Master Trust Balance | Registered investment companies (mutual funds)    
EBP, Master Trust [Line Items]    
Total Investments at fair value 1,012,735 718,567
Master Trust Balance | Corporate debt securities    
EBP, Master Trust [Line Items]    
Total Investments at fair value 867,174 755,451
Master Trust Balance | U.S. Government securities    
EBP, Master Trust [Line Items]    
Total Investments at fair value 662,609 667,026
Master Trust Balance | Other investments    
EBP, Master Trust [Line Items]    
Total Investments at fair value 148,008 130,680
Master Trust Balance | Self-directed brokerage account    
EBP, Master Trust [Line Items]    
Total Investments at fair value 3,390,181 2,842,080
Plan’s Interest in Master Trust Balance    
EBP, Master Trust [Line Items]    
Total Investments at fair value 3,036,086 2,654,788
Fully benefit-responsive investment contracts at contract value 298,693 287,601
Due from broker for securities sold 1,287 263
Accrued interest and dividends 3,061 2,062
Other receivables 2,477 3,537
Due to broker for securities purchased (2,644) (999)
Accrued expenses (2,764) (4,052)
Other payables (17) (1)
Total net assets available for benefits 3,336,179 2,943,199
Plan’s Interest in Master Trust Balance | Cash and cash equivalents and short-term investment fund    
EBP, Master Trust [Line Items]    
Total Investments at fair value 42,536 43,804
Plan’s Interest in Master Trust Balance | Common and preferred stocks    
EBP, Master Trust [Line Items]    
Total Investments at fair value 551,797 436,933
Plan’s Interest in Master Trust Balance | Common stocks - Lockheed Martin    
EBP, Master Trust [Line Items]    
Total Investments at fair value 442,939 458,545
Plan’s Interest in Master Trust Balance | Common/collective trusts    
EBP, Master Trust [Line Items]    
Total Investments at fair value 1,694,586 1,465,903
Plan’s Interest in Master Trust Balance | Registered investment companies (mutual funds)    
EBP, Master Trust [Line Items]    
Total Investments at fair value 57,532 37,102
Plan’s Interest in Master Trust Balance | Corporate debt securities    
EBP, Master Trust [Line Items]    
Total Investments at fair value 49,175 40,177
Plan’s Interest in Master Trust Balance | U.S. Government securities    
EBP, Master Trust [Line Items]    
Total Investments at fair value 38,475 36,102
Plan’s Interest in Master Trust Balance | Other investments    
EBP, Master Trust [Line Items]    
Total Investments at fair value 8,358 6,953
Plan’s Interest in Master Trust Balance | Self-directed brokerage account    
EBP, Master Trust [Line Items]    
Total Investments at fair value $ 150,688 $ 129,269