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Other Income, Net (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2019
Sep. 30, 2018
Sep. 30, 2019
Sep. 30, 2018
Other Income and Expenses [Abstract]        
Gains/(Losses) on derivatives $ (85) $ (60) $ (85) $ (182)
Currency revaluation gains/(losses) 52 36 36 80
Interest and investment income 88 49 250 140
Other 5 11 42 36
Other income, net $ 60 $ 36 $ 243 $ 74