Acquisitions and Divestitures, Goodwill, and Intangible Assets Changes In Amount Of Goodwill (Details) - USD ($) $ in Millions		6 Months Ended
		Jul. 02, 2017	Dec. 31, 2016
Goodwill [Roll Forward]
Goodwill, beginning of period	[1]	$ 11,445
Acquisitions	[2]	61
Other	[3]	173
Goodwill, end of period	[1]	11,679
Aerospace
Goodwill [Roll Forward]
Goodwill, beginning of period	[1]	2,537
Acquisitions	[2]	32
Other	[3]	113
Goodwill, end of period	[1]	2,682
Combat Systems
Goodwill [Roll Forward]
Goodwill, beginning of period	[1]	2,598
Acquisitions	[2]	0
Other	[3]	47
Goodwill, end of period	[1]	2,645
Information Systems and Technology
Goodwill [Roll Forward]
Goodwill, beginning of period	[1]	6,013
Acquisitions	[2]	29
Other	[3]	13
Goodwill, end of period	[1]	6,055
Accumulated impairment loss		2,000	$ 2,000
Marine Systems
Goodwill [Roll Forward]
Goodwill, beginning of period	[1]	297
Acquisitions	[2]	0
Other	[3]	0
Goodwill, end of period	[1]	$ 297

[1] Goodwill on December 31, 2016, and July 2, 2017, 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.