Goodwill and Identifiable Intangible Assets - Changes in Goodwill by Segment (Detail) $ in Millions	6 Months Ended
	Jun. 26, 2015 USD ($)
Goodwill [Line Items]
Balance, Beginning	$ 7,501
Business acquisitions	188
Business divestiture	(11)
Foreign currency translation adjustments	(29)
Balance, Ending	7,649
Electronic Systems [Member]
Goodwill [Line Items]
Balance, Beginning	3,773
Business acquisitions	177
Business divestiture	(11)
Foreign currency translation adjustments	(15)
Balance, Ending	3,924
Aerospace Systems [Member]
Goodwill [Line Items]
Balance, Beginning	$ 1,730
Business acquisitions
Business divestiture
Foreign currency translation adjustments	$ (14)
Balance, Ending	1,716
Communication Systems [Member]
Goodwill [Line Items]
Balance, Beginning	992
Business acquisitions	$ 11
Business divestiture
Foreign currency translation adjustments
Balance, Ending	$ 1,003
NSS [Member]
Goodwill [Line Items]
Balance, Beginning	$ 1,006
Business acquisitions
Business divestiture
Foreign currency translation adjustments
Balance, Ending	$ 1,006