Accounts Receivable, Net (Schedule of Accounts Receivable, Net) (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Accounts Notes And Loans Receivable [Line Items]
U.S. government contracts (including foreign military sales)	$ 1,204	$ 1,039
Allowance for expected credit losses	(475)	(546)
Accounts receivable, net	9,661	9,254
Other Customer
Accounts Notes And Loans Receivable [Line Items]
Accounts Receivable, Other Customers	$ 8,932	$ 8,761