Basis of Presentation (Unaudited) Contract Estimates (Details 2) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Change in Accounting Estimate [Line Items]
Revenue	$ 62	$ 209
Operating income	947	897
Net earnings	$ 842	$ 955
Diluted earnings per share	$ 5.50	$ 6.10
Contracts Accounted for under Percentage of Completion [Member]
Change in Accounting Estimate [Line Items]
Operating income	$ 46	$ 173
Net earnings	$ 36	$ 137
Diluted earnings per share	$ 0.23	$ 0.87