Acquisitions And Divestitures (Details) (USD $) In Millions, unless otherwise specified		1 Months Ended		12 Months Ended		12 Months Ended		12 Months Ended
	Dec. 31, 2010	Dec. 31, 2010 Money Controls Limited [Member]	Feb. 28, 2010 Merrimac Industries Inc. [Member]	Dec. 31, 2010 WTA Industries [Member]	Jul. 31, 2011 WTA Industries [Member]	Dec. 31, 2009 Wireless Monitoring Systems [Member]	Jul. 31, 2010 Wireless Monitoring Systems [Member]	Dec. 31, 2009 General Technology Corporation [Member]
Business Acquisition [Line Items]
Sales reported by acquired entity		$ 64	$ 32	$ 21
Business acquisition, purchase price	144	90	51		37
Business acquisition, cash acquired		3
Business acquisition, debt assumed	3		3		1
Aggregate purchase price of current assets		24	23		8
Aggregate purchase price of property, plant, and equipment		10	12		12
Aggregate purchase price of identified intangible assets		43	20		9
Aggregate purchase price of goodwill	51	31	16		12
Aggregate purchase price of other long-term assets		6
Aggregate purchase price of deferred tax asset		4
Aggregate purchase price of current liabilities		11	10		4
Aggregate purchase price of deferred tax liabilities		13	10
Aggregate purchase price of long-term liabilities		1
Proceeds of divestitures							3.0	14.2
Net sales						3		26
Proceeds of divestitures, After tax gain								$ 5.2