Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Millions		3 Months Ended
		Mar. 25, 2016	Mar. 27, 2015
Statement of Comprehensive Income [Abstract]
Net income		$ 230	$ 109
Other comprehensive income (loss):
Foreign currency translation adjustments		1	(87)
Unrealized gains (losses) on hedging instruments	[1]	7	(3)
Pension and postretirement benefit plans:
Amortization of net loss and prior service cost previously recognized	[2]	8	11
Total other comprehensive income (loss)		16	(79)
Comprehensive income		246	30
Comprehensive income attributable to noncontrolling interests		(3)	(4)
Comprehensive income attributable to L-3		$ 243	$ 26

[1] Net of income taxes of $3 million for the quarterly period ended March 25, 2016.

[2] Net of income taxes of $4 million and $6 million for the quarterly periods ended March 25, 2016 and March 27, 2015, respectively.