Basis of Presentation (Unaudited) Contract Estimates (Details 2) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Change in Accounting Estimate [Line Items]
Revenue	$ 59	$ 116	$ 363	$ 478
Operating income	844	1,043	2,695	4,909
Net earnings	$ 915	$ 1,063	$ 2,816	$ 4,295
Diluted earnings per share	$ 5.89	$ 6.63	$ 18.06	$ 26.55
Contracts Accounted for under Percentage of Completion [Member]
Change in Accounting Estimate [Line Items]
Operating income	$ 45	$ 109	$ 310	$ 453
Net earnings	$ 36	$ 86	$ 245	$ 358
Diluted earnings per share	$ 0.23	$ 0.54	$ 1.57	$ 2.21