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Acquisitions - Additional Information (Details)
€ in Millions, $ in Millions
1 Months Ended 3 Months Ended 6 Months Ended 12 Months Ended
Jun. 22, 2018
USD ($)
Mar. 01, 2017
USD ($)
Feb. 01, 2017
USD ($)
Dec. 31, 2017
USD ($)
Jun. 30, 2018
USD ($)
Sep. 30, 2017
USD ($)
Jun. 30, 2017
USD ($)
Jun. 30, 2018
USD ($)
Jun. 30, 2017
USD ($)
Dec. 31, 2017
USD ($)
Dec. 31, 2017
EUR (€)
Feb. 28, 2017
USD ($)
Business Acquisition [Line Items]                        
Purchase price, cash consideration               $ 151 $ 182      
Strategic transaction expenses         $ 8   $ 6 7 $ 17      
Customer Relationships [Member]                        
Business Acquisition [Line Items]                        
Finite-Lived Intangible Assets, Gross       $ 470 475     475   $ 470    
Core Technology [Member]                        
Business Acquisition [Line Items]                        
Finite-Lived Intangible Assets, Gross       95 110     110   95    
Trademarks and Trade Names [Member]                        
Business Acquisition [Line Items]                        
Finite-Lived Intangible Assets, Gross       17 $ 19     $ 19   17    
Prestolite E-Propulsion Systems Limited (PEPS) [Member]                        
Business Acquisition [Line Items]                        
Ownership interest in joint venture 50.00%       50.00%     50.00%        
TM4 [Member]                        
Business Acquisition [Line Items]                        
Percent of ownership interest acquired 55.00%                      
Purchase price, cash consideration $ 125                      
Strategic transaction expenses               $ 3        
TM4 [Member] | Customer Relationships [Member]                        
Business Acquisition [Line Items]                        
Finite-Lived Intangible Assets, Gross 11                      
TM4 [Member] | Core Technology [Member]                        
Business Acquisition [Line Items]                        
Finite-Lived Intangible Assets, Gross 16                      
TM4 [Member] | Trademarks and Trade Names [Member]                        
Business Acquisition [Line Items]                        
Finite-Lived Intangible Assets, Gross $ 3                      
USM - Warren [Member]                        
Business Acquisition [Line Items]                        
Strategic transaction expenses                   5    
Closing payment, including settlement of trade payables   $ 104                    
Trade payables                       $ 25
Purchase price adjustments           $ 1            
USM - Warren [Member] | Minimum [Member]                        
Business Acquisition [Line Items]                        
Fixed asset, useful life   1 year                    
USM - Warren [Member] | Maximum [Member]                        
Business Acquisition [Line Items]                        
Fixed asset, useful life   17 years                    
USM - Warren [Member] | Customer Relationships [Member]                        
Business Acquisition [Line Items]                        
Finite-Lived Intangible Assets, Gross   $ 30                    
Acquired finite-lived intangible assets, weighted average useful life   11 years                    
USM - Warren [Member] | Core Technology [Member]                        
Business Acquisition [Line Items]                        
Finite-Lived Intangible Assets, Gross   $ 3                    
Acquired finite-lived intangible assets, weighted average useful life   18 years                    
BFP and BPT [Member]                        
Business Acquisition [Line Items]                        
Percent of ownership interest acquired     80.00%                  
Purchase price, cash consideration     $ 181                  
Strategic transaction expenses                   $ 7    
Purchase price adjustments       $ 9                
Agreement to purchase certain real estate | €                     € 25  
Net cash payment         $ 20              
BFP and BPT [Member] | Minimum [Member]                        
Business Acquisition [Line Items]                        
Fixed asset, useful life     3 years                  
BFP and BPT [Member] | Maximum [Member]                        
Business Acquisition [Line Items]                        
Fixed asset, useful life     30 years                  
BFP and BPT [Member] | Customer Relationships [Member]                        
Business Acquisition [Line Items]                        
Finite-Lived Intangible Assets, Gross     $ 29                  
Acquired finite-lived intangible assets, weighted average useful life     17 years                  
BFP and BPT [Member] | Trademarks and Trade Names [Member]                        
Business Acquisition [Line Items]                        
Finite-Lived Intangible Assets, Gross     $ 12                  
Acquired finite-lived intangible assets, weighted average useful life     17 years