Contract Asset and Liability (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2022
Revenue from contract with customer [Line Items]
Contract assets	$ 12,696		$ 12,696		$ 11,534
Contract liabilities	(15,248)		(15,248)		(14,598)
Net contract liabilities	(2,552)		(2,552)		(3,064)
Contract with Customer, Asset, Change			1,162
Contract with Customer, Liability, Change			650
Contract with Customer, Liability, Revenue Recognized	900	$ 1,100	4,400	$ 4,100
Advances received to date on contracts related to precision guided munitions to certain Middle Eastern customers pending U.S. government approval	390		390
Contract with Customer, Asset, Allowance for Credit Loss	$ 235		$ 235		$ 318