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Acquisitions - Additional Information (Details) - USD ($)
$ in Millions
6 Months Ended
Sep. 09, 2019
Jun. 30, 2020
Jun. 30, 2019
Business Acquisition [Line Items]      
Goodwill increase (decrease)   $ 21 $ 78
Axle Tech Electric Vehicle Systems Division      
Business Acquisition [Line Items]      
Goodwill increase (decrease)   25  
Axle Tech Electric Vehicle Systems Division | In Process Research and Development      
Business Acquisition [Line Items]      
Intangible assets increase (decrease)   (25)  
Walker Die Casting      
Business Acquisition [Line Items]      
Payments to acquire businesses $ 103    
Working capital settlement   4  
Purchase price   $ 95