Acquisitions (Schedule Of Final Allocation Of Purchase Price) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended			12 Months Ended
	Dec. 31, 2010 Argon ST, Inc. [Member]		Aug. 05, 2010 Argon ST, Inc. [Member]	Dec. 31, 2009 Vought Aircraft Industries Inc. [Member]		Jun. 30, 2009 Vought Aircraft Industries Inc. [Member]	Dec. 31, 2010 Customer Base [Member] Argon ST, Inc. [Member]	Dec. 31, 2010 Developed Technology [Member] Argon ST, Inc. [Member]
Business Acquisition [Line Items]
Amount of cash paid to acquire entity			$ 782			$ 590
Amounts previously advanced by the Company						416
Accounts receivable	66
Inventory	47			241
Property, plant and equipment	32			170
Goodwill	549			606
Finite-lived intangible assets	216	[1]		49	[2]		69	133
Other assets	1
Accounts payable	(14)			(24)
Accrued liabilities	(69)			(31)
Other long-term liabilities				(5)
Advances and billings in excess of related costs	(8)
Deferred income taxes	(38)
Total net assets acquired	$ 782			$ 1,006
Weighted average amortization period, years	13			17

[1] Finite-lived intangible assets have a weighted average amortization period of 13 years and include $133 of Developed technology and $69 of Customer base.

[2] The weighted average amortization period for finite-lived intangible assets is 17 years.