Acquisitions and Dispositions (Tables)

12 Months Ended

Dec. 31, 2011

Acquisitions and Dispositions [Abstract]

Unaudited Pro Forma Statements of Operations Data

	Year Ended December 31,
	2010		2009
	(in millions, except per share data)
Pro forma net sales	$	15,854	$	16,047
Pro forma net income attributable to L-3	$	967	$	931
Pro forma diluted earnings per share	$	8.36	$	7.87