Goodwill and Other Purchased Intangible Assets (Details 1) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Goodwill (Table Amounts)
Beginning balance	$ 12,466	$ 12,438
Businesses acquired and other	(6)	28
Ending balance	12,460	12,466
Aerospace Systems
Goodwill (Table Amounts)
Beginning balance	3,758	3,758
Businesses acquired and other	0	0
Ending balance	3,758	3,758
Electronic Systems
Goodwill (Table Amounts)
Beginning balance	2,410	2,410
Businesses acquired and other	0	0
Ending balance	2,410	2,410
Information Systems
Goodwill (Table Amounts)
Beginning balance	5,286	5,294
Businesses acquired and other	(2)	(8)
Ending balance	5,284	5,286
Technical Services
Goodwill (Table Amounts)
Beginning balance	1,012	976
Businesses acquired and other	(4)	36
Ending balance	$ 1,008	$ 1,012