Accounts Receivable (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Accounts Receivable [Line Items]
Total accounts receivable	$ 3,041	$ 3,161
Non-U.S. Government
Accounts Receivable [Line Items]
Total accounts receivable	1,569	1,701
Receivables related to long-term production programs	1,400	1,600
Receivables related to long-term production programs, net of customer advances	(55)	(245)
U.S. Government
Accounts Receivable [Line Items]
Total accounts receivable	1,043	1,040
Commercial
Accounts Receivable [Line Items]
Total accounts receivable	$ 429	$ 420