Contract Asset and Liability (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021
Revenue from contract with customer [Line Items]
Contract assets	$ 11,566		$ 11,361
Contract liabilities	(13,739)		(13,720)
Net contract liabilities	(2,173)		(2,359)
Contract with Customer, Asset, Change	205
Contract with Customer, Liability, Revenue Recognized	1,800	$ 1,700
Advances received to date on contracts related to precision guided munitions to certain Middle Eastern customers pending U.S. government approval	420
Contract with Customer, Asset, Allowance for Credit Loss	$ 330		$ 251