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Unaudited Quarterly Financial Data (Tables)

12 Months Ended

Dec. 31, 2011

Unaudited Quarterly Financial Data [Abstract]

Company's unaudited quarterly results of operations


	First Quarter		Second Quarter		Third Quarter		Fourth Quarter
	(in millions, except per share data)
2011
Sales	$	3,601	$	3,766	$	3,787	$	4,015
Operating income		390		404		406		398
Net income		207		246		238		277
Net income attributable to L-3		204		243		235		274
Basic EPS⁽¹⁾		1.87		2.28		2.27		2.75
Diluted EPS⁽¹⁾		1.85		2.26		2.24		2.72

2010
Sales	$	3,624	$	3,966	$	3,835	$	4,255
Operating income		410		442		437		461
Net income		222		231		241		272
Net income attributable to L-3		221		228		238		268
Basic EPS⁽¹⁾		1.89		1.97		2.08		2.38
Diluted EPS⁽¹⁾		1.87		1.95		2.07		2.37

⁽¹⁾

Basic and diluted EPS amounts in each quarter are computed using the weighted-average number of shares outstanding during that quarter, while basic and diluted EPS for the full year is computed using the weighted-average number of shares outstanding during the year. Therefore, the sum of the four quarters’ basic or diluted EPS may not equal the full year basic or diluted EPS.