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Commitments and Contingencies (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Minimum rentals on operating leases [Abstract]      
2018 $ 17    
2019 16    
2020 13    
2021 10    
2022 9    
Thereafter 37    
Rent expense 26 $ 26 $ 27
Guarantor Obligations, Current Carrying Value 0 0  
Financial Guarantee [Member]      
Minimum rentals on operating leases [Abstract]      
Maximum potential payments 52 35  
Counter Guarantee [Member] | Ford Motor Company [Member]      
Minimum rentals on operating leases [Abstract]      
Counter guarantee $ 44 $ 31