Goodwill and Other Purchased Intangible Assets (Details 1) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Goodwill (Table Amounts)
Beginning balance	$ 12,438	$ 12,431
Businesses acquired and other	28	7
Ending balance	12,466	12,438
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	5,294	5,287
Businesses acquired and other	(8)	7
Ending balance	5,286	5,294
Technical Services
Goodwill (Table Amounts)
Beginning balance	976	976
Businesses acquired and other	36	0
Ending balance	$ 1,012	$ 976