Acquisitions and Dispositions (Tables)

9 Months Ended

Sep. 30, 2011

Acquisition and Dispositions (Tables) [Abstract]

Unaudited Pro Forma Statements of Operations Data

	Third Quarter Ended		Year-to-Date Ended
	September 24, 2010		September 24, 2010
	(in millions, except per share data)
Pro forma net sales	$	3,862	$	11,583
Pro forma net income attributable to L-3	$	239	$	700
Pro forma diluted earnings per share	$	2.07	$	6.00