Legal Proceedings (Details) (A-12 Program [Member], USD $) In Millions, unless otherwise specified	0 Months Ended	3 Months Ended	1 Months Ended
	Mar. 31, 1998	Dec. 31, 2013	Dec. 31, 2009 Unliquidated Progress Payments [Member]
Legal Proceedings [Line Items]
Award of unreimbursed costs	$ 1,200
Loss contingency, estimate of possible loss			1,352
Charge/(Benefit) Related to Litigation Settlement		$ 406