Acquisitions And Divestitures Other (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Mar. 31, 2016
Sep. 30, 2015
Sep. 30, 2016
Sep. 30, 2015
Business Acquisition [Line Items]        
Cost of technology investments     $ 3 $ 23
Tula Technology Inc. | Powertrain Systems        
Business Acquisition [Line Items]        
Cost of technology investments   $ 20    
Quanergy | Electronics And Safety        
Business Acquisition [Line Items]        
Cost of technology investments $ 3 $ 3