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Reorganization Of Businesses (Net Charges Incurred By Business Segment) (Details) (USD $)
In Millions, unless otherwise specified
3 Months Ended
Mar. 31, 2012
Apr. 02, 2011
Restructuring Cost and Reserve [Line Items]    
Reorganization of business charges $ 9 $ 8
Government [Member]
   
Restructuring Cost and Reserve [Line Items]    
Reorganization of business charges 7 8
Enterprise Mobility Solutions [Member]
   
Restructuring Cost and Reserve [Line Items]    
Reorganization of business charges $ 2 $ 0