Other Income (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Component of Other Income, Nonoperating [Line Items]
Gains/(Losses) on derivatives	$ 110	$ 208	$ (148)
Currency revaluation gains/(losses)	(161)	(236)	82
Interest and investment income	69	53	50
Insurance Fee Income	88	74	61
Other Nonoperating Income (Expense)	178	166	213
Other Income Loss Net	284	265	258
Affiliated Entity [Member]
Component of Other Income, Nonoperating [Line Items]
Related Party Transaction, Interest Income, Notes Receivable, Tax Sharing Agreement	$ 3	$ 5	$ 11