Segment Information (Details 3) (USD $) In Millions, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Total assets by segment (Table Amounts) [Abstract]
Total assets	$ 26,381	$ 26,543
Aerospace Systems
Total assets by segment (Table Amounts) [Abstract]
Total assets	6,490	6,657
Electronic Systems
Total assets by segment (Table Amounts) [Abstract]
Total assets	4,400	4,551
Information Systems
Total assets by segment (Table Amounts) [Abstract]
Total assets	6,887	6,940
Technical Services
Total assets by segment (Table Amounts) [Abstract]
Total assets	1,367	1,313
Total segment
Total assets by segment (Table Amounts) [Abstract]
Total assets	19,144	19,461
Corporate
Total assets by segment (Table Amounts) [Abstract]
Total assets	$ 7,237	$ 7,082