Accounts Receivable (Schedule Of Accounts Receivable) (Details) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
Accounts Receivables [Line Items]
Less valuation allowance, Current	$ 73	$ 57
Accounts receivable, net	3,266	3,879
U.S. Government Contracts [Member]
Accounts Receivables [Line Items]
Accounts Receivable, before Allowance for Credit Loss, Current	1,121	1,877
Commercial Airplanes Accounts Receivable [Member]
Accounts Receivables [Line Items]
Accounts Receivable, before Allowance for Credit Loss, Current	29	51
Global Services Accounts Receivable [Member]
Accounts Receivables [Line Items]
Accounts Receivable, before Allowance for Credit Loss, Current	1,967	1,783
Defense, Space, & Security Accounts Receivable [Member]
Accounts Receivables [Line Items]
Accounts Receivable, before Allowance for Credit Loss, Current	220	222
Other Accounts Receivable [Member]
Accounts Receivables [Line Items]
Accounts Receivable, before Allowance for Credit Loss, Current	$ 2	$ 3