Cost Of Contracts (Detail) - USD ($) $ in Millions	Apr. 03, 2016	Dec. 31, 2015
Contractors [Abstract]
Contract costs and estimated profits	$ 24,969	$ 20,742
Other contract costs	907	965
Costs in excess of billings on uncompleted contracts or programs, total	25,876	21,707
Advances and progress payments	(21,171)	(17,350)
Total contracts in process	$ 4,705	$ 4,357