Goodwill and Other Purchased Intangible Assets Goodwill and Other Purchased Intangible Assets (Details 4) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Goodwill [Line Items]
Amortization of Intangible Assets	$ 26	$ 36	$ 37
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	21 years
Disclosure of Change of Date for Annual Goodwill Impairment Test	the fourth quarter of 2013, the company changed the date of its annual goodwill impairment test from November 30 to December 31.
Aerospace Systems [Member]
Goodwill [Line Items]
Goodwill, Impaired, Accumulated Impairment Loss	$ 570