Basis of Presentation (Details Textual) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Apr. 02, 2011
Basis of Presentation (Textual) [Abstract]
Gross favorable program profit adjustments	$ 17	$ 21
Gross unfavorable program profit adjustments	13	7
Contracts Accounted for under Percentage of Completion Method [Member]
Change in Accounting Estimate [Line Items]
Income from continuing operations before income taxes	4	14
Income from continuing operations after tax	$ 2	$ 8
Income from continuing operations per diluted share	$ 0.01	$ 0.03