Debt - Additional Information (Detail) - L-3 Communications Corporation [Member] - 3.95% Senior Notes due 2016 [Member] - USD ($) $ in Millions	3 Months Ended
	Mar. 25, 2016	Mar. 24, 2016
Debt Instrument [Line Items]
Redemption amount		$ 300
Redemption Date	May 20, 2016
Minimum [Member]
Debt Instrument [Line Items]
Redemption price as percentage of principal amount		100.00%
Redemption at treasury rate		0.50%