Summary of Significant Accounting Policies Backlog and Contract Assets and Liabilities (Details 6) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Backlog, Awards, and Related Adjustments [Line Items]
Revenue, Remaining Performance Obligation, Amount	$ 91,500
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Explanation	Of our December 31, 2024 backlog, we expect to recognize approximately 40 percent as revenue over the next 12 months and 65 percent as revenue over the next 24 months, with the remainder to be recognized thereafter.
Change in Contract with Customer, Asset and Liability [Abstract]
Contract with Customer, Liability, Revenue Recognized	$ 3,600	$ 3,100	$ 2,400
Unbilled Receivables, Current	5,908	5,693
Increase (Decrease) in Contract with Customer, Asset	$ 215
Percent increase (decrease) in Unbilled Receivables	4.00%
Advance payments and billings in excess of costs incurred	$ (4,070)	(4,193)
Amount of decrease (increase) in Contract with Customer, Liability, Current	$ 123
Percent decrease (increase) in Contract with Customer, Liability, Current	(3.00%)
Net contract assets	$ 1,838	$ 1,500
Amount of increase (decrease) in net contract assets (liabilities)	$ 338
Percent increase (decrease) in net contract assets (liabilities)	23.00%
Contract with Customer, Asset, Explanation of Change	Changes in the company’s contract assets and liabilities primarily result from timing differences between revenue recognition and customer billings and/or payments. Net contract assets as of December 31, 2024 increased 23 percent from the prior year, primarily due to the burn down of advances on certain Aeronautics Systems programs and an increase in unbilled receivables on several programs at Space Systems.
Space Systems | Restricted Space [Member]
Backlog, Awards, and Related Adjustments [Line Items]
Backlog Reduction Due to Contract Termination	$ 1,600
Space Systems | NGI Program [Member]
Backlog, Awards, and Related Adjustments [Line Items]
Backlog Reduction Due to Contract Termination	$ 700
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-12-31
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Percentage	40.00%
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period	12 months
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Percentage	65.00%
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period	24 months