v3.26.1
RELATED PARTY AND EXEMPT PARTY-IN-INTEREST TRANSACTIONS (Details) - EBP 310 - USD ($)
12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
EBP, Master Trust [Line Items]    
Total investments at fair value $ 488,511,000 $ 442,383,000
EBP, investment, employer, common stock, to total asset, percentage 2.00% 2.00%
Master Trust Balances    
EBP, Master Trust [Line Items]    
Total investments at fair value $ 6,568,083,000 $ 5,644,890,000
Dividends $ 13,646,000  
HII common stock | Master Trust Balances    
EBP, Master Trust [Line Items]    
EBP, investment, number of shares (in shares) 806,762 957,878
Total investments at fair value $ 274,356,000 $ 181,010,000
Dividends 4,961,000  
Interest-Bearing Deposits | Master Trust Balances    
EBP, Master Trust [Line Items]    
Total investments at fair value $ 469,000 $ 550,000