Unaudited Condensed Consolidated Statements of Equity (USD $) In Millions	Total		L-3 Holdings' Common Stock	Additional Paid-in Capital	Treasury Stock	Retained Earnings	Accumulated Other Comprehensive (Loss) Income	Noncontrolling Interests
Beginning Balance at Dec. 31, 2009	$ 6,660		$ 1	$ 4,448	$ (1,824)	$ 4,108	$ (166)	$ 93
Beginning Balance, Shares at Dec. 31, 2009			115.4
Comprehensive income:
Net income	449					449
Net income attributable to noncontrolling interests	4							(4)
Pension and postretirement benefit plans:
Net gain arising during the period	2						2
Amortization of net loss and prior service cost previously recognized, net of income taxes of $7 and $ 10 for the year 2010 and 2011, respectively	12						12
Foreign currency translation adjustment	(58)						(58)
Unrealized gains (losses) on hedging instruments, net of income taxes of $2 and income tax benefit of $2 for the year 2010 and 2011, respectively	1						1
Total comprehensive income	410
Distributions to noncontrolling interests	(4)							(4)
Cash dividends paid on common stock (0.80 and 0.90 per share for the year 2010 and 2011, respectively)	(93)					(93)
Shares issued:
Employee savings plans	74			74
Employee savings plans, Shares			0.9
Exercise of stock options	60			60
Exercise of stock options, Shares			0.9
Employee stock purchase plan	32			32
Employee stock purchase plan, Shares			0.5
Stock-based compensation expense	42			42
Treasury stock purchased	(254)				(254)
Treasury stock purchased, Shares			(2.9)
Other	(1)					(1)
Ending Balance at Jun. 25, 2010	6,926		1	4,656	(2,078)	4,463	(209)	93
Ending Balance, Shares at Jun. 25, 2010			114.8
Beginning Balance at Dec. 31, 2010	6,855		1	4,800	(2,658)	4,877	(256)	91
Beginning Balance, Shares at Dec. 31, 2010			108.6
Comprehensive income:
Net income	447					447
Net income attributable to noncontrolling interests	6							(6)
Pension and postretirement benefit plans:
Amortization of net loss and prior service cost previously recognized, net of income taxes of $7 and $ 10 for the year 2010 and 2011, respectively	16						16
Foreign currency translation adjustment	67						67
Unrealized gains (losses) on hedging instruments, net of income taxes of $2 and income tax benefit of $2 for the year 2010 and 2011, respectively	(2)						(2)
Total comprehensive income	534
Distributions to noncontrolling interests	(6)							(6)
Cash dividends paid on common stock (0.80 and 0.90 per share for the year 2010 and 2011, respectively)	(97)					(97)
Shares issued:
Employee savings plans	78			78
Employee savings plans, Shares			1.1
Exercise of stock options	20			20
Exercise of stock options, Shares			0.3
Employee stock purchase plan	23			23
Employee stock purchase plan, Shares			0.9
Stock-based compensation expense	34			34
Treasury stock purchased	(429)				(429)
Treasury stock purchased, Shares			(5.4)
Other	3			5		(2)
Other, Shares			0.1
Ending Balance at Jul. 01, 2011	$ 7,015	[1]	$ 1	$ 4,960	$ (3,087)	$ 5,225	$ (175)	$ 91
Ending Balance, Shares at Jul. 01, 2011			105.6

[1] Unaudited