Segment Information (Details 2) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Aerospace Systems
Intersegment sales and operating income (Table Amounts) [Abstract]
Sales	$ 149	$ 171	$ 134
Operating Income	18	20	18
Electronic Systems
Intersegment sales and operating income (Table Amounts) [Abstract]
Sales	629	607	649
Operating Income	125	110	131
Information Systems
Intersegment sales and operating income (Table Amounts) [Abstract]
Sales	504	682	687
Operating Income	63	78	68
Technical Services
Intersegment sales and operating income (Table Amounts) [Abstract]
Sales	659	624	568
Operating Income	50	50	41
Intersegment Eliminations [Member]
Intersegment sales and operating income (Table Amounts) [Abstract]
Sales	1,941	2,084	2,038
Operating Income	$ 256	$ 258	$ 258