Summary of Significant Accounting Policies (Unaudited) Backlog and Contract Assets and Liabilities (Details 3) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Change in Contract with Customer, Liability [Abstract]
Contract with Customer, Liability, Revenue Recognized	$ 780	$ 1,100	$ 2,700	$ 3,000
Backlog, Awards, and Related Adjustments [Line Items]
Revenue, Remaining Performance Obligation, Amount	89,700		$ 89,700
Defense Systems [Member] | IMS business
Backlog, Awards, and Related Adjustments [Line Items]
Backlog Reduction due to Divestiture	$ 150
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-06-30
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Percentage	40.00%		40.00%
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period	12 months		12 months
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-07-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Percentage	65.00%		65.00%
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period	24 months		24 months