Condensed Consolidated Balance Sheets (USD $) In Millions	9 Months Ended		12 Months Ended
	Sep. 30, 2011		Dec. 31, 2010
Current assets:
Cash and cash equivalents	$ 538	[1]	$ 607
Billed receivables, net of allowances of $30 in 2011 and $34 in 2010	1,188	[1]	1,299
Contracts in process	2,783	[1]	2,548
Inventories	352	[1]	303
Deferred income taxes	116	[1]	114
Other current assets	168	[1]	207
Total current assets	5,145	[1]	5,078
Property, plant and equipment, net	917	[1]	923
Goodwill	8,735	[1]	8,730
Identifiable intangible assets	428	[1]	470
Deferred debt issue costs	34	[1]	39
Other assets	194	[1]	211
Total assets	15,453	[1]	15,451
Current liabilities:
Current portion of long-term debt	0	[1]	11
Accounts payable, trade	515	[1]	463
Accrued employment costs	698	[1]	672
Accrued expenses	577	[1]	569
Advance payments and billings in excess of costs incurred	539	[1]	580
Income taxes	22	[1]	49
Other current liabilities	389	[1]	389
Total current liabilities	2,740	[1]	2,733
Pension and postretirement benefits	870	[1]	943
Deferred income taxes	418	[1]	308
Other liabilities	512	[1]	486
Long-term debt	4,126	[1]	4,126
Total liabilities	8,666	[1]	8,596
Commitments and contingencies (see Note 17)		[1]
L-3 shareholders' equity:
L-3 Communications Holdings, Inc.'s common stock: $.01 par value; 300,000,000 shares authorized, 100,880,071 shares outstanding at September 30, 2011 and 108,623,509 shares outstanding at December 31, 2010 (L-3 Communications Corporation's common stock: $.01 par value, 100 shares authorized, issued and outstanding)	5,000	[1]	4,801
L-3 Communications Holdings, Inc.'s treasury stock (at cost), 42,882,514 shares at September 30, 2011 and 32,037,454 shares at December 31, 2010	(3,458)	[1]	(2,658)
Retained earnings	5,413	[1]	4,877
Accumulated other comprehensive loss	(259)	[1]	(256)
Total L-3 shareholders' equity	6,696	[1]	6,764
Noncontrolling interests	91	[1]	91
Total equity	6,787	[1]	6,855
Total liabilities and equity	$ 15,453	[1]	$ 15,451

[1] Unaudited