Summary of Significant Accounting Policies Contract Estimates (Details 5) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		12 Months Ended
	Dec. 31, 2022	Mar. 31, 2022	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Change in Accounting Estimate [Line Items]
Contract with Customer, Performance Obligation Satisfied in Previous Period			$ 447	$ 568	$ 504
Operating income			3,601	5,651	4,065
Net earnings			$ 4,896	$ 7,005	$ 3,189
Diluted earnings per share			$ 31.47	$ 43.54	$ 19.03
Contracts Accounted for under Percentage of Completion [Member]
Change in Accounting Estimate [Line Items]
Operating income			$ 360	$ 527	$ 466
Net earnings			$ 284	$ 416	$ 368
Diluted earnings per share			$ 1.83	$ 2.59	$ 2.20
F-35 Program | Contracts Accounted for under Percentage of Completion [Member] | Aeronautics Systems
Change in Accounting Estimate [Line Items]
Operating income				$ (135)
Restricted Program | Contracts Accounted for under Percentage of Completion [Member] | Aeronautics Systems
Change in Accounting Estimate [Line Items]
Operating income	$ 66	$ 67