Basis of Presentation (Unaudited) (Details 1) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Change in Accounting Estimate [Line Items]
Operating income	$ 946	$ 817	$ 1,882	$ 1,665
Net earnings	$ 861	$ 789	$ 1,724	$ 1,629
Earnings Per Share, Diluted	$ 5.06	$ 4.50	$ 10.11	$ 9.29
Contract with Customer, Performance Obligation Satisfied in Previous Period	$ 154	$ 156	$ 320	$ 289
Contracts Accounted for under Percentage of Completion [Member]
Change in Accounting Estimate [Line Items]
Operating income	158	143	296	259
Net earnings	$ 125	$ 113	$ 234	$ 205
Earnings Per Share, Diluted	$ 0.73	$ 0.64	$ 1.37	$ 1.17
Aerospace Systems [Member] | Contracts Accounted for under Percentage of Completion [Member]
Change in Accounting Estimate [Line Items]
Operating income		$ 69