Other Income, Net (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Other Income and Expenses [Abstract]
Gains/(Losses) on derivatives	$ (178)	$ (87)
Currency revaluation gains/(losses)	131	62
Interest and investment income	79	42
Other	27	20
Total other income, net	$ 59	$ 37