Summary of Significant Accounting Policies (Unaudited) Contract Estimates (Details 2) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024	Dec. 31, 2023
Change in Accounting Estimate [Line Items]
Operating income	$ 573	$ 1,071
Net earnings	$ 481	$ 944
Diluted earnings per share	$ 3.32	$ 6.32
B-21 loss provision	$ 477	$ 0
Contracts Accounted for under Percentage of Completion [Member]
Change in Accounting Estimate [Line Items]
Revenue	38	74
Operating income	(100)	94
Net earnings	$ (79)	$ 74
Diluted earnings per share	$ (0.55)	$ 0.50
B-21 Program LRIP Options 1-5 | Contracts Accounted for under Percentage of Completion [Member] | Aeronautics Systems [Member]
Change in Accounting Estimate [Line Items]
B-21 loss provision	$ 477		$ 1,560
Loss Contingency Accrual	1,700
B-21 Program LRIP Options 1-2 | Contracts Accounted for under Percentage of Completion [Member] | Aeronautics Systems [Member]
Change in Accounting Estimate [Line Items]
Operating income	226
B-21 Program LRIP Options 3-5 | Contracts Accounted for under Percentage of Completion [Member] | Aeronautics Systems [Member]
Change in Accounting Estimate [Line Items]
B-21 loss provision	$ 251