Investments (Schedule Of Ownership Percentages And Balances Of Equity Method Investments) (Details) - USD ($) $ in Millions		Dec. 31, 2015	Dec. 31, 2014
Schedule of Equity Method Investments [Line Items]
Equity method investments	[1]	$ 1,230	$ 1,114
Defense, Space & Security [Member] | Network & Space Systems [Member] | United Launch Alliance [Member]
Schedule of Equity Method Investments [Line Items]
Equity Method Investment, Ownership Percentage		50.00%	50.00%
Equity method investments		$ 908	$ 916
Commercial Airplanes, Network & Space Systems, and Global Services & Support [Member] | Other [Member]
Schedule of Equity Method Investments [Line Items]
Equity method investments		$ 322	$ 198

[1] Dividends received were $239 and $293 during 2015 and 2014. Retained earnings at December 31, 2015 include undistributed earnings from our equity method investments of $251.