Summary of Significant Accounting Policies (Unaudited) Contract Estimates (Details 2) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended					9 Months Ended
	Sep. 30, 2025	Jun. 30, 2025	Mar. 31, 2025	Sep. 30, 2024	Dec. 31, 2023	Sep. 30, 2025	Sep. 30, 2024
Change in Accounting Estimate [Abstract]
Operating income	$ 1,242			$ 1,120		$ 3,240	$ 3,281
Net earnings	$ 1,100			$ 1,026		$ 2,755	$ 2,910
Diluted earnings per share	$ 7.67			$ 7.00		$ 19.12	$ 19.69
B-21 loss provision						$ 477	$ 0
Change in Accounting Estimate [Line Items]
Operating income	$ 1,242			$ 1,120		3,240	3,281
Net earnings	$ 1,100			$ 1,026		$ 2,755	$ 2,910
Diluted earnings per share	$ 7.67			$ 7.00		$ 19.12	$ 19.69
B-21 loss provision						$ 477	$ 0
Contracts Accounted for under Percentage of Completion [Member]
Change in Accounting Estimate [Abstract]
Revenue	$ 181			$ 131		383	242
Operating income	81			136		107	268
Net earnings	$ 64			$ 107		$ 85	$ 212
Diluted earnings per share	$ 0.45			$ 0.73		$ 0.59	$ 1.43
Change in Accounting Estimate [Line Items]
Revenue	$ 181			$ 131		$ 383	$ 242
Operating income	81			136		107	268
Net earnings	$ 64			$ 107		$ 85	$ 212
Diluted earnings per share	$ 0.45			$ 0.73		$ 0.59	$ 1.43
B-21 Program LRIP Options 1-5 | Contracts Accounted for under Percentage of Completion [Member] | Aeronautics Systems [Member]
Change in Accounting Estimate [Abstract]
B-21 loss provision			$ 477		$ 1,560
Loss Contingency Accrual	$ 1,600					$ 1,600
Change in Accounting Estimate [Line Items]
B-21 loss provision			477		$ 1,560
Loss Contingency Accrual	1,600					$ 1,600
B-21 Program LRIP Options 1-2 | Contracts Accounted for under Percentage of Completion [Member] | Aeronautics Systems [Member]
Change in Accounting Estimate [Abstract]
Operating income	(122)		(226)
Change in Accounting Estimate [Line Items]
Operating income	(122)		$ (226)
Sentinel EMD phase [Member] | Contracts Accounted for under Percentage of Completion [Member] | Defense Systems [Member]
Change in Accounting Estimate [Abstract]
Operating income		$ 76
Change in Accounting Estimate [Line Items]
Operating income		$ 76
HALO Program | Contracts Accounted for under Percentage of Completion [Member] | Space Systems [Member]
Change in Accounting Estimate [Abstract]
Operating income				$ 39
Change in Accounting Estimate [Line Items]
Operating income				$ 39
Restricted Microelectronics | Contracts Accounted for under Percentage of Completion [Member] | Mission Systems [Member]
Change in Accounting Estimate [Abstract]
Operating income	68
Change in Accounting Estimate [Line Items]
Operating income	$ 68