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Investments (Gain of Realignment) (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2016
Jun. 30, 2016
Investments [Abstract]    
Cash   $ 4,818
Carrying Value of Dow Corning Equity Investment   (1,560)
Carrying Value of HSG Equity Investment   (383)
Other   (199)
Gain $ 2,676 $ 2,676