Basis of Presentation (Unaudited) Contract Estimates (Details 2) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Change in Accounting Estimate [Line Items]
Revenue	$ 95	$ 95	$ 157	$ 304
Operating income	967	954	1,914	1,851
Net earnings	$ 812	$ 946	$ 1,654	$ 1,901
Diluted earnings per share	$ 5.34	$ 6.06	$ 10.83	$ 12.16
Contracts Accounted for under Percentage of Completion [Member]
Change in Accounting Estimate [Line Items]
Operating income	$ 76	$ 92	$ 122	$ 265
Net earnings	$ 60	$ 73	$ 96	$ 209
Diluted earnings per share	$ 0.39	$ 0.47	$ 0.63	$ 1.34