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Summary of Accounting Policies (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Average Turnover Period of Trade Receivables 30 days    
Foreign Currency [Abstract]      
Foreign Currency Transaction Gain (Loss), before Tax $ (121) $ 307 $ 307
Intangible Assets, Net (Excluding Goodwill) [Abstract]      
Finite-Lived Intangible Assets, Net 178 213  
Goodwill, Impaired, Accumulated Impairment Loss [Abstract]      
Goodwill $ 264 75  
Fair Value Disclosures [Abstract]      
Term At Which Fair Value of Finance Receivables is Measured 120 days    
Selected Other Costs [Abstract]      
Engineering, research, and development $ 8,200 8,000 7,300
Advertising 4,000 4,100 4,300
Affiliated Entity [Member] | Operating Segments [Member] | Ford Credit      
Finance and Lease Incentives [Abstract]      
Earned Interest Supplements And Residual Support Revenue 2,400 2,000 1,600
Amount of Reduction in Depreciation Expense On Property Subject To Or Held For Lease 2,400 $ 2,100 $ 1,900
Autonomic, Transloc, and Skinny Labs [Member]      
Goodwill, Impaired, Accumulated Impairment Loss [Abstract]      
Goodwill, Acquired During Period 230    
Chariot [Member]      
Goodwill, Impaired, Accumulated Impairment Loss [Abstract]      
Goodwill, Impairment Loss $ 40