Restructuring Restructuring Costs by Segment (Details) (USD $)
In Millions, unless otherwise specified
3 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Restructuring Cost and Reserve [Line Items]    
Restructuring $ 16 $ 21
Electrical / Electronic Architecture    
Restructuring Cost and Reserve [Line Items]    
Restructuring 4 13
Powertrain Systems    
Restructuring Cost and Reserve [Line Items]    
Restructuring 6 2
Electronics And Safety    
Restructuring Cost and Reserve [Line Items]    
Restructuring $ 6 $ 6