Segment Information (Unaudited) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014 segment	Jun. 30, 2013
Segment Reporting Information [Line Items]
Number of reportable segments			4
Sales	$ 6,039	$ 6,294	$ 11,887	$ 12,398
Operating income	820	806	1,665	1,565
Operating Segments [Member]
Segment Reporting Information [Line Items]
Operating income	742	797	1,499	1,545
Operating Segments [Member] | Aerospace Systems [Member]
Segment Reporting Information [Line Items]
Sales	2,502	2,613	4,922	5,098
Operating income	290	336	614	606
Operating Segments [Member] | Electronic Systems [Member]
Segment Reporting Information [Line Items]
Sales	1,744	1,771	3,388	3,492
Operating income	291	322	559	618
Operating Segments [Member] | Information Systems [Member]
Segment Reporting Information [Line Items]
Sales	1,562	1,689	3,139	3,363
Operating income	153	141	315	312
Operating Segments [Member] | Technical Services [Member]
Segment Reporting Information [Line Items]
Sales	732	722	1,429	1,439
Operating income	68	69	136	134
Intersegment Eliminations [Member]
Segment Reporting Information [Line Items]
Sales	(501)	(501)	(991)	(994)
Operating income	(60)	(71)	(125)	(125)
Segment Reconciling Items [Member]
Segment Reporting Information [Line Items]
Net FAS/CAS pension adjustment	110	31	220	64
Other	(1)	(1)	(1)	(4)
Corporate, Non-Segment [Member]
Segment Reporting Information [Line Items]
Unallocated corporate expenses	$ (31)	$ (21)	$ (53)	$ (40)