Summary of Significant Accounting Policies (Unaudited) Contract Estimates (Details 2) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended				6 Months Ended
	Jun. 30, 2025	Mar. 31, 2025	Jun. 30, 2024	Dec. 31, 2023	Jun. 30, 2025	Jun. 30, 2024
Change in Accounting Estimate [Abstract]
Operating income	$ 1,425		$ 1,090		$ 1,998	$ 2,161
Net earnings	$ 1,174		$ 940		$ 1,655	$ 1,884
Diluted earnings per share	$ 8.15		$ 6.36		$ 11.45	$ 12.69
B-21 loss provision					$ 477	$ 0
Change in Accounting Estimate [Line Items]
Operating income	$ 1,425		$ 1,090		1,998	2,161
Net earnings	$ 1,174		$ 940		$ 1,655	$ 1,884
Diluted earnings per share	$ 8.15		$ 6.36		$ 11.45	$ 12.69
B-21 loss provision					$ 477	$ 0
Contracts Accounted for under Percentage of Completion [Member]
Change in Accounting Estimate [Abstract]
Revenue	$ 164		$ 37		202	111
Operating income	126		38		26	132
Net earnings	$ 100		$ 30		$ 21	$ 104
Diluted earnings per share	$ 0.69		$ 0.20		$ 0.15	$ 0.70
Change in Accounting Estimate [Line Items]
Revenue	$ 164		$ 37		$ 202	$ 111
Operating income	126		38		26	132
Net earnings	$ 100		$ 30		$ 21	$ 104
Diluted earnings per share	$ 0.69		$ 0.20		$ 0.15	$ 0.70
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		226
Change in Accounting Estimate [Line Items]
Operating income		$ 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