Basis of Presentation (Unaudited) Contract Estimates (Details 2) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Change in Accounting Estimate [Line Items]
Operating income	$ 1,016	$ 844	$ 2,930	$ 2,695
Net earnings	$ 937	$ 915	$ 2,591	$ 2,816
Diluted earnings per share	$ 6.18	$ 5.89	$ 17.00	$ 18.06
Contracts Accounted for under Percentage of Completion [Member]
Change in Accounting Estimate [Line Items]
Revenue	$ 95	$ 59	$ 252	$ 363
Operating income	58	45	180	310
Net earnings	$ 46	$ 36	$ 142	$ 245
Diluted earnings per share	$ 0.30	$ 0.23	$ 0.93	$ 1.57