Segment Information (Narrative) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013 segments	Dec. 31, 2012	Dec. 31, 2011
Segment Reporting Information [Line Items]
Number of Reportable Segments	5
Percent of operating assets located outside the United States	3.00%	3.00%
Earnings from operations associated with our cost and equity method investments	$ 214	$ 268	$ 278
Defense, Space & Security [Member] | Network & Space Systems [Member]
Segment Reporting Information [Line Items]
Earnings from operations associated with our cost and equity method investments	203	196	210
Defense, Space & Security [Member] | U S Government Contracts [Member] | Sales [Member]
Segment Reporting Information [Line Items]
Entity-Wide Revenue, Major Customer, Percentage	34.00%	33.00%	37.00%
Commercial Airplanes [Member]
Segment Reporting Information [Line Items]
Earnings from operations associated with our cost and equity method investments	$ 25	$ 77	$ 69