Goodwill and Identifiable Intangible Assets - Allocated by Reportable Segment (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 30, 2018	Dec. 31, 2017
Goodwill [Line Items]
Goodwill	$ 6,736	$ 6,719
Accumulated impairment losses	(104)	(104)
Balance	6,615
Foreign currency translation adjustments	17
Balance	6,632
Electronic Systems [Member]
Goodwill [Line Items]
Goodwill	2,870	2,856
Accumulated impairment losses	(43)	(43)
Balance	2,813
Foreign currency translation adjustments	14
Balance	2,827
Aerospace Systems [Member]
Goodwill [Line Items]
Goodwill	1,144	1,146
Accumulated impairment losses	0	0
Balance	1,146
Foreign currency translation adjustments	(2)
Balance	1,144
Communication Systems [Member]
Goodwill [Line Items]
Goodwill	1,058	1,058
Accumulated impairment losses	(35)	(35)
Balance	1,023
Foreign currency translation adjustments	0
Balance	1,023
Sensor Systems [Member]
Goodwill [Line Items]
Goodwill	1,664	1,659
Accumulated impairment losses	(26)	$ (26)
Balance	1,633
Foreign currency translation adjustments	5
Balance	$ 1,638