Segment Information (Details 1) (USD $) In Millions, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2013 segment	Dec. 31, 2012	Dec. 31, 2011
Sales and Service Revenues by Segment (Table Amounts) [Abstract]
Number of reportable segments									4
Total sales	$ 6,157	$ 6,106	$ 6,294	$ 6,104	$ 6,476	$ 6,270	$ 6,274	$ 6,198	$ 24,661	$ 25,218	$ 26,412
Net FAS/CAS pension adjustment									168	132	400
Unallocated Corporate Expenses									(119)	(168)	(166)
Other Reconciling Expenses (Income)									(6)	(10)	(13)
Operating income	768	790	806	759	824	736	774	796	3,123	3,130	3,276
Aerospace Systems
Sales and Service Revenues by Segment (Table Amounts) [Abstract]
Total sales									10,014	9,977	9,964
Operating income									1,215	1,218	1,217
Electronic Systems
Sales and Service Revenues by Segment (Table Amounts) [Abstract]
Total sales									7,149	6,950	7,372
Operating income									1,226	1,187	1,070
Information Systems
Sales and Service Revenues by Segment (Table Amounts) [Abstract]
Total sales									6,596	7,356	7,921
Operating income									633	761	766
Technical Services
Sales and Service Revenues by Segment (Table Amounts) [Abstract]
Total sales									2,843	3,019	3,193
Operating income									262	268	260
Intersegment eliminations
Sales and Service Revenues by Segment (Table Amounts) [Abstract]
Total sales									(1,941)	(2,084)	(2,038)
Operating income									(256)	(258)	(258)
Total segment operating income
Sales and Service Revenues by Segment (Table Amounts) [Abstract]
Operating income									$ 3,080	$ 3,176	$ 3,055