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Commitments and Contingencies (Details) - USD ($)
$ in Millions
9 Months Ended
Sep. 30, 2016
Sep. 30, 2015
Dec. 31, 2015
Loss Contingency [Abstract]      
Loss contingency estimate $ 2,800    
Warranty [Abstract]      
Product warranty reserve, beginning balance 4,558 $ 4,785  
Payments made during the period (2,464) (2,036)  
Changes in accrual related to warranties issued during the period 1,704 1,523  
Changes in accrual related to pre-existing warranties 1,088 495  
Foreign currency translation and other 42 (192)  
Product warranty reserve, ending balance 4,928 $ 4,575  
Affiliated Entity [Member]      
Guarantees [Abstract]      
Maximum potential payments 227   $ 284
Carrying value of recorded liabilities related to guarantees and indemnifications $ 23   $ 23