v3.26.1
INVESTMENTS - Schedule of Master Trust Net Assets (Details) - EBP 310 - USD ($)
Dec. 31, 2025
Dec. 31, 2024
At fair value:    
Total investments at fair value $ 488,511,000 $ 442,383,000
Liabilities:    
NET ASSETS AVAILABLE FOR BENEFITS 518,046,000 470,357,000
Master Trust Balances    
At fair value:    
Total investments at fair value 6,568,083,000 5,644,890,000
At contract value:    
Total investments at contract value 671,822,000 687,944,000
Receivables:    
Pending receivable 40,687,000 37,618,000
Accrued balance 421,000 382,000
Receivables 41,108,000 38,000,000
Total assets 7,281,013,000 6,370,834,000
Liabilities:    
Accrued expenses 749,000 497,000
Total liabilities 749,000 497,000
NET ASSETS AVAILABLE FOR BENEFITS 7,280,264,000 6,370,337,000
Master Trust Balances | Short-term investment funds    
At fair value:    
Total investments at fair value 21,639,000 21,658,000
Master Trust Balances | HII common stock    
At fair value:    
Total investments at fair value 274,356,000 181,010,000
Master Trust Balances | Collective trust funds    
At fair value:    
Total investments at fair value 5,820,851,000 5,040,576,000
Master Trust Balances | Schwab Personal Choice Retirement Account    
At fair value:    
Total investments at fair value 451,237,000 401,646,000
Master Trust Balances | Synthetic guaranteed investment contracts    
At contract value:    
Total investments at contract value 671,822,000 687,944,000
Plan's Interest in Master Trust Balances    
At fair value:    
Total investments at fair value 450,541,000 402,455,000
At contract value:    
Total investments at contract value 36,756,000 38,882,000
Receivables:    
Pending receivable 0 0
Accrued balance 421,000 382,000
Receivables 421,000 382,000
Total assets 487,718,000 441,719,000
Liabilities:    
Accrued expenses 0 0
Total liabilities 0 0
NET ASSETS AVAILABLE FOR BENEFITS 487,718,000 441,719,000
Plan's Interest in Master Trust Balances | Short-term investment funds    
At fair value:    
Total investments at fair value 1,167,000 1,207,000
Plan's Interest in Master Trust Balances | HII common stock    
At fair value:    
Total investments at fair value 5,307,000 4,400,000
Plan's Interest in Master Trust Balances | Collective trust funds    
At fair value:    
Total investments at fair value 444,067,000 396,848,000
Plan's Interest in Master Trust Balances | Schwab Personal Choice Retirement Account    
At fair value:    
Total investments at fair value 0 0
Plan's Interest in Master Trust Balances | Synthetic guaranteed investment contracts    
At contract value:    
Total investments at contract value $ 36,756,000 $ 38,882,000