Derivatives (Details 2) (Net Investment Hedges) In Millions, unless otherwise specified	3 Months Ended						3 Months Ended
	Mar. 31, 2015 USD ($)	Mar. 31, 2014 USD ($)	Mar. 31, 2015 Foreign currency forward contracts USD ($)	Mar. 31, 2014 Foreign currency forward contracts USD ($)	Mar. 31, 2015 Foreign currency forward contracts EUR (€)	Mar. 31, 2015 Foreign currency forward contracts KRW	Mar. 31, 2015 Foreign currency forward contracts Cost of Sales USD ($)	Mar. 31, 2015 Foreign Currency Denominated Debt USD ($)	Mar. 31, 2014 Foreign Currency Denominated Debt USD ($)	Mar. 31, 2015 Foreign Currency Denominated Debt EUR (€)
Net investment hedges
Pretax Gain (Loss) Recognized as Cumulative Translation within Other Comprehensive Income on Effective Portion of Instrument	$ 397	$ 9	$ 157					$ 240	$ 9
Ineffective portion of gain (loss) on derivative and amount excluded from effectiveness testing recognized in income	0	0					0	0	0
Face amount										1,850
Derivative notional amount					2,450	275,000
Effective portion of net investment hedge reclassified out of other comprehensive income into income	0
Change related to revision to gain recognized within currency translation adjustment due to immaterial correction in 2014 years presented				$ 18