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Equity In Net Assets of Nonconsolidated Affiliates (Details) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2017
Mar. 31, 2016
Dec. 31, 2016
Schedule of Equity Method Investments [Line Items]      
Equity income $ 555 $ 560  
Equity Method Investee [Member]      
Schedule of Equity Method Investments [Line Items]      
Undistributed earnings 2,700   $ 2,200
Automotive China JVs equity income [Member]      
Schedule of Equity Method Investments [Line Items]      
Equity income $ 504 518  
Change in ownership percentage 0.00%    
Automotive China JVs' net sales $ 11,201 11,191  
Automotive China JVs' net income 1,046 1,086  
Other joint ventures equity income [Member]      
Schedule of Equity Method Investments [Line Items]      
Equity income $ 51 $ 42