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	694					687		7
Pension and postretirement benefit plans:
Net gain arising during the period	3						3
Amortization of net loss and prior service cost previously recognized, net of income taxes of $12 and $14 for the year 2010 and 2011, respectively	19						19
Foreign currency translation adjustment	(14)						(14)
Unrealized gains (losses) on hedging instruments, net of income taxes of $2 and income tax benefit of $7 for the year 2010 and 2011, respectively	2						2
Total comprehensive income	704
Distributions to noncontrolling interests	(10)							(10)
Cash dividends paid on common stock ($1.20 and $1.35 per share for the year 2010 and 2011, respectively)	(139)					(139)
Shares issued:
Employee savings plans	110			110
Employee savings plans, Shares			1.4
Exercise of stock options	57			57
Exercise of stock options, Shares			1.0
Employee stock purchase plan	32			32
Employee stock purchase plan, Shares			1.0
Stock-based compensation expense	62			62
Treasury stock purchased	(469)				(469)
Treasury stock purchased, Shares			5.9
Other	(7)			(5)		(2)
Other, Shares			0.2
Ending Balance at Sep. 24, 2010	7,000		1	4,704	(2,293)	4,654	(156)	90
Ending Balance, Shares at Sep. 24, 2010			113.1
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	691					682		9
Pension and postretirement benefit plans:
Amortization of net loss and prior service cost previously recognized, net of income taxes of $12 and $14 for the year 2010 and 2011, respectively	22						22
Foreign currency translation adjustment	(14)						(14)
Unrealized gains (losses) on hedging instruments, net of income taxes of $2 and income tax benefit of $7 for the year 2010 and 2011, respectively	(11)						(11)
Total comprehensive income	688
Distributions to noncontrolling interests	(9)							(9)
Cash dividends paid on common stock ($1.20 and $1.35 per share for the year 2010 and 2011, respectively)	(143)					(143)
Shares issued:
Employee savings plans	108			108
Employee savings plans, Shares			1.6
Exercise of stock options	18			18
Exercise of stock options, Shares			0.4
Employee stock purchase plan	23			23
Employee stock purchase plan, Shares			0.9
Stock-based compensation expense	51			51
Treasury stock purchased	(800)				(800)
Treasury stock purchased, Shares			10.8
Other	(4)			(1)		(3)
Other, Shares			0.2
Ending Balance at Sep. 30, 2011	$ 6,787	[1]	$ 1	$ 4,999	$ (3,458)	$ 5,413	$ (259)	$ 91
Ending Balance, Shares at Sep. 30, 2011			100.9

[1] Unaudited