Goodwill and Identifiable Intangible Assets - Changes in Goodwill by Segment (Detail) (USD $) In Millions, unless otherwise specified	9 Months Ended
	Sep. 26, 2014
Goodwill [Line Items]
Balance, Beginning	$ 7,796
Business acquisition	36
Foreign currency translation adjustments	(48)
Balance, Ending	7,784
Electronic Systems [Member]
Goodwill [Line Items]
Balance, Beginning	4,085
Business acquisition	(3)
Foreign currency translation adjustments	(39)
Balance, Ending	4,043
Aerospace Systems [Member]
Goodwill [Line Items]
Balance, Beginning	1,751
Business acquisition
Foreign currency translation adjustments	(9)
Balance, Ending	1,742
Communication Systems [Member]
Goodwill [Line Items]
Balance, Beginning	992
Business acquisition
Foreign currency translation adjustments
Balance, Ending	992
NSS [Member]
Goodwill [Line Items]
Balance, Beginning	968
Business acquisition	39
Foreign currency translation adjustments
Balance, Ending	$ 1,007