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Summary of Accounting Policies (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Average Turnover Period of Trade Receivables 30 days    
Foreign Currency [Abstract]      
Foreign Currency Transaction Gain (Loss), before Tax $ 108 $ (121) $ 307
Intangible Assets, Net (Excluding Goodwill) [Abstract]      
Finite-Lived Intangible Assets, Net 188 178  
Goodwill, Impaired, Accumulated Impairment Loss [Abstract]      
Goodwill $ 278 264  
Fair Value Disclosures [Abstract]      
Term At Which Fair Value of Finance Receivables is Measured 120 days    
Selected Other Costs [Abstract]      
Engineering, research, and development $ 7,400 8,200 8,000
Advertising 3,600 4,000 4,100
Affiliated Entity [Member] | Operating Segments | Ford Credit      
Finance and Lease Incentives [Abstract]      
Earned Interest Supplements And Residual Support Revenue 2,500 2,400 2,000
Amount of Reduction in Depreciation Expense On Property Subject To Or Held For Lease $ 2,600 $ 2,400 $ 2,100