Investments (Schedule Of Ownership Percentages And Balances Of Equity Method Investments) (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2012		Dec. 31, 2011
Schedule of Equity Method Investments [Line Items]
Equity method investments	$ 1,137	[1]	$ 1,003	[1]
Network & Space Systems [Member] | United Launch Alliance [Member]
Schedule of Equity Method Investments [Line Items]
Ownership Percentages	50.00%
Equity method investments	946		983
Network & Space Systems [Member] | United Space Alliance [Member]
Schedule of Equity Method Investments [Line Items]
Ownership Percentages	50.00%
Equity method investments	28	[2]	(147)	[3]
Commercial Airplanes [Member] | Other [Member]
Schedule of Equity Method Investments [Line Items]
Equity method investments	$ 163		$ 167

[1] Dividends received were $341 and $239 during 2012 and 2011.

[2] The positive balance at December 31, 2012 reflects the termination and settlement of the defined benefit pension plans during the third quarter of 2012.

[3] The credit balance in 2011 was a result of our proportionate share of the joint venture’s pension and postretirement related adjustments which reduced the carrying value of the investment.