Other Income (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Component of Other Income, Nonoperating [Line Items]
Derivative Instruments, Gain/(Loss) recongnized in income, Ineffectiveness Portion and amount not designated as hedging instruments	$ 92	$ 158	$ 37	$ 95
Foreign Currency Transaction Gain (Loss), Realized	(106)	(170)	(117)	(132)
Investment Income, Net	30	12	75	41
Insurance Fee Income	25	16	63	57
Other Nonoperating Income (Expense)	37	51	121	123
Other Income Loss Net	$ 78	$ 67	$ 179	$ 184