v3.26.1
FINANCIAL INSTRUMENTS (Details) - EBP 015 - USD ($)
Dec. 31, 2025
Dec. 31, 2024
EBP, Investment, Fair Value and NAV [Line Items]    
Investments, at fair value $ 16,594,424,000  
Plan interest in Master Trust   $ 14,914,440,000
L3Harris common stock    
EBP, Investment, Fair Value and NAV [Line Items]    
Plan interest in Master Trust 1,703,713,532 1,341,277,592
Total    
EBP, Investment, Fair Value and NAV [Line Items]    
Investments, at fair value 5,378,787,000  
Plan interest in Master Trust   4,865,026,000
Total | Brokerage window account    
EBP, Investment, Fair Value and NAV [Line Items]    
Investments, at fair value 1,078,335,000  
Plan interest in Master Trust   917,574,000
Total | L3Harris common stock    
EBP, Investment, Fair Value and NAV [Line Items]    
Investments, at fair value 1,703,714,000  
Plan interest in Master Trust   1,351,012,000
Total | Equities    
EBP, Investment, Fair Value and NAV [Line Items]    
Investments, at fair value 2,294,463,000  
Plan interest in Master Trust   2,335,075,000
Total | Fixed income    
EBP, Investment, Fair Value and NAV [Line Items]    
Investments, at fair value 302,275,000  
Plan interest in Master Trust   261,365,000
Level 1    
EBP, Investment, Fair Value and NAV [Line Items]    
Investments, at fair value 5,076,512,000  
Plan interest in Master Trust   4,603,661,000
Level 1 | Brokerage window account    
EBP, Investment, Fair Value and NAV [Line Items]    
Investments, at fair value 1,078,335,000  
Plan interest in Master Trust   917,574,000
Level 1 | L3Harris common stock    
EBP, Investment, Fair Value and NAV [Line Items]    
Investments, at fair value 1,703,714,000  
Plan interest in Master Trust   1,351,012,000
Level 1 | Equities    
EBP, Investment, Fair Value and NAV [Line Items]    
Investments, at fair value 2,294,463,000  
Plan interest in Master Trust   2,335,075,000
Level 1 | Fixed income    
EBP, Investment, Fair Value and NAV [Line Items]    
Investments, at fair value 0  
Plan interest in Master Trust   0
Level 2    
EBP, Investment, Fair Value and NAV [Line Items]    
Investments, at fair value 302,275,000  
Plan interest in Master Trust   261,365,000
Level 2 | Brokerage window account    
EBP, Investment, Fair Value and NAV [Line Items]    
Investments, at fair value 0  
Plan interest in Master Trust   0
Level 2 | L3Harris common stock    
EBP, Investment, Fair Value and NAV [Line Items]    
Investments, at fair value 0  
Plan interest in Master Trust   0
Level 2 | Equities    
EBP, Investment, Fair Value and NAV [Line Items]    
Investments, at fair value 0  
Plan interest in Master Trust   0
Level 2 | Fixed income    
EBP, Investment, Fair Value and NAV [Line Items]    
Investments, at fair value 302,275,000  
Plan interest in Master Trust   261,365,000
Level 3    
EBP, Investment, Fair Value and NAV [Line Items]    
Investments, at fair value 0  
Plan interest in Master Trust   0
Level 3 | Brokerage window account    
EBP, Investment, Fair Value and NAV [Line Items]    
Investments, at fair value 0  
Plan interest in Master Trust   0
Level 3 | L3Harris common stock    
EBP, Investment, Fair Value and NAV [Line Items]    
Investments, at fair value 0  
Plan interest in Master Trust   0
Level 3 | Equities    
EBP, Investment, Fair Value and NAV [Line Items]    
Investments, at fair value 0  
Plan interest in Master Trust   0
Level 3 | Fixed income    
EBP, Investment, Fair Value and NAV [Line Items]    
Investments, at fair value 0  
Plan interest in Master Trust   0
NAV    
EBP, Investment, Fair Value and NAV [Line Items]    
Investments, at fair value $ 11,215,637,000  
Plan interest in Master Trust   $ 10,049,414,000