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Restructuring - Schedule of Restructuring Reserve (Details) - 2017 Plan
$ in Millions
9 Months Ended
Sep. 30, 2017
USD ($)
Restructuring Plan  
Balance as of December 31, 2016 $ 0
Expensed 369
Cash payments (199)
Foreign currency translation and other 17
Balance as of September 30, 2017 $ 187