Basis of Presentation (Unaudited) Property Plant and Equipment (Details 4) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
Property, Plant and Equipment [Abstract]
Proceeds from sale of equipment to a customer	$ 0	$ 100
Capital Expenditures Incurred but Not yet Paid	$ 134	118
Noncash Investing and Financing Activities Related Text	During the nine months ended September 30, 2022, the company received lease incentives for landlord funded leasehold improvements of $96 million related to a Space Systems real estate lease, which were recorded in PP&E and included in non-cash investing activities. During the nine months ended September 30, 2022, the company acquired $46 million of internal use software through long-term financing directly with the supplier. The software was recorded in PP&E as a non-cash investing activity and the related liability was recorded in long-term debt as a non-cash financing activity. Non-cash investing activities also include capital expenditures incurred but not yet paid of $134 million and $118 million as of September 30, 2023 and 2022, respectively. In the fourth quarter of 2020, the company completed a sale of equipment to a customer on a restricted Aeronautics Systems program. During the nine months ended September 30, 2022, the company received cash payments of $100 million related to the equipment sale and included it in Proceeds from sale of equipment to a customer in the unaudited condensed consolidated statement of cash flows.
Leasehold Improvements [Member]
Property, Plant and Equipment [Line Items]
Noncash or Part Noncash Acquisition, Fixed Assets Acquired		96
Software and Software Development Costs [Member]
Property, Plant and Equipment [Line Items]
Noncash or Part Noncash Acquisition, Fixed Assets Acquired		$ 46