Fair Value Measurements and Financial Instruments (Details 6) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Venezuelan Investments [Roll Forward]
Loss (gain) related to the remeasurement of fixed interest rate and devaluation-protected bonds in Venezuela	$ 50	$ 324
Bonds Issued By Venezuelan Government [Member]
Venezuelan Investments [Roll Forward]
Beginning balance	399	685
Unrealized gain (loss) on investment	(17)	(341)
Purchases and sales during the period	12	55
Available-for-sale Securities, Venezuela Accounting Change	(394)	0
Ending balance	$ 0	$ 399