Acquisitions, Divestitures, Intangible Assets And Goodwill (Amortization Lives (In Years) Of Intangible Assets) (Details)	12 Months Ended
	Dec. 31, 2011 years
Acquisitions Divestitures Intangible Assets And Goodwill [Line Items]
Weighted Average Amortization Life	19
Contract And Program Intangible Assets [Member]
Acquisitions Divestitures Intangible Assets And Goodwill [Line Items]
Weighted Average Amortization Life	17
Range of Amortization Life, Minimum	7
Range of Amortization Life, Maximum	30
Trade Names And Trademarks [Member]
Acquisitions Divestitures Intangible Assets And Goodwill [Line Items]
Weighted Average Amortization Life	30
Range of Amortization Life, Maximum	30
Technology And Software [Member]
Acquisitions Divestitures Intangible Assets And Goodwill [Line Items]
Weighted Average Amortization Life	11
Range of Amortization Life, Minimum	7
Range of Amortization Life, Maximum	13
Other Intangible Assets [Member]
Acquisitions Divestitures Intangible Assets And Goodwill [Line Items]
Weighted Average Amortization Life	11
Range of Amortization Life, Minimum	7
Range of Amortization Life, Maximum	15