Basis of Presentation (Unaudited) Contract Estimates (Details 2) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Change in Accounting Estimate [Line Items]
Revenue	$ 209	$ 202
Operating income	897	2,822
Net earnings	$ 955	$ 2,195
Diluted earnings per share	$ 6.10	$ 13.43
Contracts Accounted for under Percentage of Completion [Member]
Change in Accounting Estimate [Line Items]
Operating income	$ 173	$ 190
Net earnings	$ 137	$ 150
Diluted earnings per share	$ 0.87	$ 0.92