Receivables, net, Contract Assets and Contract Liabilities - Additional Information (Details) - USD ($)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Accounts, Notes, Loans and Financing Receivable [Line Items]
U.S. government receivables	$ 1,300,000,000
Receivables from other governments and commercial customers	1,963,000,000	$ 1,978,000,000
Contract assets, progress payments	43,900,000,000	39,700,000,000
Increase in contract assets	1,034,000,000	451,000,000	$ (378,000,000)
Impairment loss	0	0
Increase in contract liability	562,000,000	491,000,000	563,000,000
Liability, revenue recognized	4,500,000,000	$ 4,000,000,000	$ 3,900,000,000
Other Governments and Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Receivables from other governments and commercial customers	$ 708,000,000