Acquisitions and Divestitures, Goodwill, and Intangible Assets Changes In Amount Of Goodwill (Detail) - USD ($) $ in Millions		3 Months Ended
		Apr. 02, 2017	Dec. 31, 2015
Goodwill [Roll Forward]
Goodwill, beginning of period	[1]	$ 11,445
Acquisitions	[2]	33
Other	[3]	54
Goodwill, end of period		11,532
Aerospace
Goodwill [Roll Forward]
Goodwill, beginning of period	[1]	2,537
Acquisitions	[2]	33
Other	[3]	35
Goodwill, end of period		2,605
Combat Systems
Goodwill [Roll Forward]
Goodwill, beginning of period	[1]	2,598
Acquisitions	[2]	0
Other	[3]	15
Goodwill, end of period		2,613
Information Systems and Technology
Goodwill [Roll Forward]
Goodwill, beginning of period	[1]	6,013
Acquisitions	[2]	0
Other	[3]	4
Goodwill, end of period		6,017
Accumulated impairment loss			$ 2,000
Marine Systems
Goodwill [Roll Forward]
Goodwill, beginning of period	[1]	297
Acquisitions	[2]	0
Other	[3]	0
Goodwill, end of period		$ 297

[1] Goodwill on December 31, 2016, in the Information Systems and Technology reporting unit is net of $2 billion of accumulated impairment losses.

[2] Includes adjustments during the purchase price allocation period.

[3] Consists primarily of adjustments for foreign currency translation.