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Inventoried Costs, Net (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Inventory [Line Items]    
Inventory, Raw Materials, Net of Reserves $ 306 $ 293
Inventory, Work in Process, Net of Reserves 945 1,118
Inventory, Finished Goods, Net of Reserves 58 44
Inventoried costs, net 1,309 $ 1,455
Increase (Decrease) in Inventoried Costs, Net $ (146)  
Percent Increase (Decrease) in Inventoried Costs, Net (10.00%)