Inventory (Details) - USD ($) $ in Millions	Sep. 30, 2024	Dec. 31, 2023
Inventory [Line Items]
Contracts in process	$ 1,076	$ 647
Inventory, Raw Materials, Net of Reserves	388	338
Inventory, Work in Process, Net of Reserves	115	72
Inventory, Finished Goods, Net of Reserves	67	52
Total product inventory	570	462
Inventoried costs, net	$ 1,646	$ 1,109