Goodwill and Identifiable Intangible Assets - Additional Information (Detail) - USD ($) $ in Millions	Jun. 26, 2015	Dec. 31, 2014
Goodwill [Line Items]
Accumulated goodwill impairment losses	$ 58	$ 58
Electronic Systems [Member]
Goodwill [Line Items]
Accumulated goodwill impairment losses	43	43
Communication Systems [Member]
Goodwill [Line Items]
Accumulated goodwill impairment losses	$ 15	$ 15