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Acquisitions And Divestitures Sale of Reception Systems Business (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended 12 Months Ended
Dec. 31, 2015
Sep. 30, 2015
Jun. 30, 2015
Mar. 31, 2015
Dec. 31, 2014
Sep. 30, 2014
Jun. 30, 2014
Mar. 31, 2014
Jun. 30, 2015
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Jul. 31, 2015
Business Acquisition [Line Items]                          
Proceeds from business divestitures, net                   $ 11 $ 0 $ 0  
Net sales $ 3,879 $ 3,631 $ 3,858 $ 3,797 $ 3,778 $ 3,762 $ 4,062 $ 3,897   15,165 $ 15,499 $ 15,051  
Gain (loss) on business divestitures                   (8)      
Disposal Group, Held-for-sale or Disposed of by Sale, Not Discontinued Operations | Reception Systems                          
Business Acquisition [Line Items]                          
Proceeds from business divestitures, net                   25      
Buyer-assumed pension liabilities                         $ 39
Net sales                 $ 55        
Electronics And Safety | Disposal Group, Held-for-sale or Disposed of by Sale, Not Discontinued Operations | Reception Systems | Cost of Sales                          
Business Acquisition [Line Items]                          
Gain (loss) on business divestitures                   $ 39