Condensed Combining Financial Information of L-3 Communications and Its Subsidiaries (Details) (USD $) In Millions	Jul. 01, 2011		Dec. 31, 2010	Jun. 25, 2010	Dec. 31, 2009
Current assets:
Cash and cash equivalents	$ 548	[1]	$ 607	$ 1,023	$ 1,016
Billed receivables, net	1,240	[1]	1,299
Contracts in process	2,734	[1]	2,548
Other current assets	662		624
Total current assets	5,184	[1]	5,078
Goodwill	8,795	[1]	8,730
Other assets	1,598		1,643
Investment in and amounts due from consolidated subsidiaries	0		0
Total assets	15,577	[1]	15,451
Current portion of long-term debt	0	[1]	11
Other current liabilities			2,722
Current liabilities	2,671	[1]	2,733
Amounts due to consolidated subsidiaries	0		0
Other long-term liabilities	1,765		1,737
Long-term debt	4,126	[1]	4,126
Total liabilities	8,562	[1]	8,596
L-3 shareholders' equity	6,924	[1]	6,764
Noncontrolling interests	91	[1]	91
Total equity	7,015	[1]	6,855	6,926	6,660
Total liabilities and equity	15,577	[1]	15,451
L-3 Holdings (Parent) [Member]
Current assets:
Cash and cash equivalents	0		0
Billed receivables, net	0		0
Contracts in process	0		0
Other current assets	0		0
Total current assets	0		0
Goodwill	0		0
Other assets	0		0
Investment in and amounts due from consolidated subsidiaries	7,613		7,462
Total assets	7,613		7,462
Current portion of long-term debt			11
Other current liabilities			0
Current liabilities	0
Amounts due to consolidated subsidiaries	0		0
Other long-term liabilities	0		0
Long-term debt	689		687
Total liabilities	689		698
L-3 shareholders' equity	6,924		6,764
Noncontrolling interests	0		0
Total equity	6,924		6,764
Total liabilities and equity	7,613		7,462
L-3 Communications [Member]
Current assets:
Cash and cash equivalents	129		257	667	797
Billed receivables, net	341		387
Contracts in process	872		801
Other current assets	297		295
Total current assets	1,639		1,740
Goodwill	1,867		1,857
Other assets	685		693
Investment in and amounts due from consolidated subsidiaries	9,110		8,912
Total assets	13,301		13,202
Current portion of long-term debt			11
Other current liabilities			898
Current liabilities	826
Amounts due to consolidated subsidiaries	0		0
Other long-term liabilities	1,425		1,403
Long-term debt	4,126		4,126
Total liabilities	6,377		6,438
L-3 shareholders' equity	6,924		6,764
Noncontrolling interests	0		0
Total equity	6,924		6,764
Total liabilities and equity	13,301		13,202
Guarantor Subsidiaries [Member]
Current assets:
Cash and cash equivalents	10		3	3	4
Billed receivables, net	666		680
Contracts in process	1,567		1,525
Other current assets	157		161
Total current assets	2,400		2,369
Goodwill	5,595		5,592
Other assets	727		763
Investment in and amounts due from consolidated subsidiaries	2,555		2,417
Total assets	11,277		11,141
Current portion of long-term debt			0
Other current liabilities			1,388
Current liabilities	1,305
Amounts due to consolidated subsidiaries	0		0
Other long-term liabilities	235		235
Long-term debt	0		0
Total liabilities	1,540		1,623
L-3 shareholders' equity	9,737		9,518
Noncontrolling interests	0		0
Total equity	9,737		9,518
Total liabilities and equity	11,277		11,141
Non-Guarantor Subsidiaries [Member]
Current assets:
Cash and cash equivalents	464		482	439	364
Billed receivables, net	233		232
Contracts in process	295		222
Other current assets	208		168
Total current assets	1,200		1,104
Goodwill	1,333		1,281
Other assets	186		187
Investment in and amounts due from consolidated subsidiaries	0		0
Total assets	2,719		2,572
Current portion of long-term debt			0
Other current liabilities			571
Current liabilities	595
Amounts due to consolidated subsidiaries	420		439
Other long-term liabilities	105		99
Long-term debt	0		0
Total liabilities	1,120		1,109
L-3 shareholders' equity	1,599		1,463
Noncontrolling interests	0		0
Total equity	1,599		1,463
Total liabilities and equity	2,719		2,572
Eliminations [Member]
Current assets:
Cash and cash equivalents	(55)		(135)	(86)	(149)
Billed receivables, net	0		0
Contracts in process	0		0
Other current assets	0		0
Total current assets	(55)		(135)
Goodwill	0		0
Other assets	0		0
Investment in and amounts due from consolidated subsidiaries	(19,278)		(18,791)
Total assets	(19,333)		(18,926)
Current portion of long-term debt			(11)
Other current liabilities			(135)
Current liabilities	(55)
Amounts due to consolidated subsidiaries	(420)		(439)
Other long-term liabilities	0		0
Long-term debt	(689)		(687)
Total liabilities	(1,164)		(1,272)
L-3 shareholders' equity	(18,260)		(17,745)
Noncontrolling interests	91		91
Total equity	(18,169)		(17,654)
Total liabilities and equity	$ (19,333)		$ (18,926)

[1] Unaudited