Goodwill and Identifiable Intangible Assets - Allocated by Reportable Segment (Details) - USD ($) $ in Millions	6 Months Ended
	Jun. 29, 2018	Dec. 31, 2017
Goodwill [Line Items]
Goodwill	$ 6,755	$ 6,719
Accumulated impairment losses	(104)	(104)
Balance	6,615
Business acquisitions	59
Foreign currency translation adjustments	(23)
Balance	6,651
Electronic Systems [Member]
Goodwill [Line Items]
Goodwill	2,857	2,856
Accumulated impairment losses	(43)	(43)
Balance	2,813
Business acquisitions	16
Foreign currency translation adjustments	(15)
Balance	2,814
Aerospace Systems [Member]
Goodwill [Line Items]
Goodwill	1,143	1,146
Accumulated impairment losses	0	0
Balance	1,146
Business acquisitions	0
Foreign currency translation adjustments	(3)
Balance	1,143
Communication Systems [Member]
Goodwill [Line Items]
Goodwill	1,058	1,058
Accumulated impairment losses	(35)	(35)
Balance	1,023
Business acquisitions	0
Foreign currency translation adjustments	0
Balance	1,023
Sensor Systems [Member]
Goodwill [Line Items]
Goodwill	1,697	1,659
Accumulated impairment losses	(26)	$ (26)
Balance	1,633
Business acquisitions	43
Foreign currency translation adjustments	(5)
Balance	$ 1,671