Basis of Presentation (Unaudited) Contract Estimates (Details 2) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended				9 Months Ended
	Sep. 30, 2024	Dec. 31, 2023	Sep. 30, 2023	Jun. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Change in Accounting Estimate [Line Items]
Operating income	$ 1,120		$ 1,016		$ 3,281	$ 2,930
Net earnings	$ 1,026		$ 937		$ 2,910	$ 2,591
Diluted earnings per share	$ 7.00		$ 6.18		$ 19.69	$ 17.00
Contracts Accounted for under Percentage of Completion [Member]
Change in Accounting Estimate [Line Items]
Revenue	$ 131		$ 95		$ 242	$ 252
Operating income	136		58		268	180
Net earnings	$ 107		$ 46		$ 212	$ 142
Diluted earnings per share	$ 0.73		$ 0.30		$ 1.43	$ 0.93
Contracts Accounted for under Percentage of Completion [Member] | B-21 Program LRIP Options [Member] | Aeronautics Systems [Member]
Change in Accounting Estimate [Line Items]
Loss Contingency, Loss in Period		$ 1,560
Loss Contingency Accrual	$ 1,400				$ 1,400
Loss Contingency, Accrual, Current	946				$ 946
Contracts Accounted for under Percentage of Completion [Member] | HALO Program | Space Systems [Member]
Change in Accounting Estimate [Line Items]
Operating income	$ 39			$ (36)