Goodwill and Acquired Intangibles (Detail) $ in Millions	3 Months Ended
	Mar. 27, 2016 USD ($)
Goodwill [Line Items]
Goodwill, beginning balance	$ 13,576
Foreign currency translation	7
Goodwill, ending balance	13,583
Aeronautics
Goodwill [Line Items]
Goodwill, beginning balance	171
Goodwill, ending balance	171
Information Systems & Global Solutions
Goodwill [Line Items]
Goodwill, beginning balance	2,881
Foreign currency translation	(6)
Goodwill, ending balance	2,875
Missiles and Fire Control
Goodwill [Line Items]
Goodwill, beginning balance	2,198
Foreign currency translation	(3)
Goodwill, ending balance	2,195
Mission Systems and Training
Goodwill [Line Items]
Goodwill, beginning balance	6,738
Foreign currency translation	16
Goodwill, ending balance	6,754
Space Systems
Goodwill [Line Items]
Goodwill, beginning balance	1,588
Goodwill, ending balance	$ 1,588