Goodwill and Identifiable Intangible Assets - Changes in Goodwill by Segment (Detail) $ in Millions	3 Months Ended
	Mar. 25, 2016 USD ($)
Goodwill [Line Items]
Goodwill	$ 6,723
Accumulated impairment losses	(442)
Balance, Beginning	6,281
Business acquisitions	22
Foreign currency translation adjustments	3
Balance, Ending	6,306
Goodwill	6,748
Accumulated impairment losses	(442)
Goodwill, net of accumulated impairment losses	6,306
Electronic Systems [Member]
Goodwill [Line Items]
Goodwill	3,994
Accumulated impairment losses	(69)
Balance, Beginning	$ 3,925
Business acquisitions
Foreign currency translation adjustments	$ (7)
Balance, Ending	3,918
Goodwill	3,987
Accumulated impairment losses	(69)
Goodwill, net of accumulated impairment losses	3,918
Aerospace Systems [Member]
Goodwill [Line Items]
Goodwill	1,691
Accumulated impairment losses	(338)
Balance, Beginning	$ 1,353
Business acquisitions
Foreign currency translation adjustments	$ 10
Balance, Ending	1,363
Goodwill	1,701
Accumulated impairment losses	(338)
Goodwill, net of accumulated impairment losses	1,363
Communication Systems [Member]
Goodwill [Line Items]
Goodwill	1,038
Accumulated impairment losses	(35)
Balance, Beginning	1,003
Business acquisitions	$ 22
Foreign currency translation adjustments
Balance, Ending	$ 1,025
Goodwill	1,060
Accumulated impairment losses	(35)
Goodwill, net of accumulated impairment losses	$ 1,025