Accounts Receivable (Schedule Of Accounts Receivable) (Details) - USD ($) $ in Millions		Dec. 31, 2016	Dec. 31, 2015
Accounts Receivables [Line Items]
Less valuation allowance, Current		$ (65)	$ (94)
Accounts receivable, Net, Current		8,832	8,713
U S Government Contracts [Member]
Accounts Receivables [Line Items]
Accounts Receivable, Gross, Current		4,639	4,864
Commercial Airplanes Accounts Receivable [Member]
Accounts Receivables [Line Items]
Accounts Receivable, Gross, Current		2,432	2,250
Defense, Space & Security Customers Excluding US Government Contracts [Member]
Accounts Receivables [Line Items]
Accounts Receivable, Gross, Current	[1]	733	889
Reinsurance Receivables [Member]
Accounts Receivables [Line Items]
Accounts Receivable, Gross, Current		526	550
Other Account Receivable [Member]
Accounts Receivables [Line Items]
Accounts Receivable, Gross, Current		$ 567	$ 254

[1] Excludes U.S. government contracts