Fair Value Measurements and Financial Instruments (Details 4) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014 USD ($)	Dec. 31, 2013 USD ($)	Dec. 31, 2014 Other Current Assets [Member] USD ($)	Dec. 31, 2013 Other Current Assets [Member] USD ($)	Dec. 31, 2014 Fair Value, Inputs, Level 1 [Member] Other Current Assets [Member] Deposits [Member] USD ($)	Dec. 31, 2014 Fair Value, Inputs, Level 2 [Member] Bonds Issued By Venezuelan Government [Member] USD ($)	Dec. 31, 2013 Fair Value, Inputs, Level 2 [Member] Bonds Issued By Venezuelan Government [Member] USD ($)	Dec. 31, 2012 Fair Value, Inputs, Level 2 [Member] Bonds Issued By Venezuelan Government [Member] USD ($)	Dec. 31, 2014 Fair Value, Inputs, Level 2 [Member] Other Current Assets [Member] Bonds Issued By Venezuelan Government [Member] USD ($)	Dec. 31, 2014 Fair Value, Inputs, Level 2 [Member] Estimate of Fair Value Measurement [Member] Other Assets [Member] Bonds Issued By Venezuelan Government [Member] USD ($)	Dec. 31, 2013 Fair Value, Inputs, Level 2 [Member] Estimate of Fair Value Measurement [Member] Other Assets [Member] Bonds Issued By Venezuelan Government [Member] USD ($)	Dec. 31, 2014 VENEZUELA VEF	Dec. 31, 2012 VENEZUELA VEF
Financial Instruments and Fair Value Measurements [Abstract]
Loss (gain) related to the remeasurement of fixed interest rate and devaluation-protected bonds in Venezuela	$ 324
Schedule of Available for Sale Securities and Marketable Securities [Line Items]
Marketable Securities			200	173	123
Available-for-sale Securities						399	685	642	77	322	685
Fair Value of U.S. dollar-linked, devaluation-protected bonds						114
Fair Value of fixed interest rate bonds						285
Loss related to the remeasurement of fixed interest rate bonds in Venezuela		$ 133
Official Exchange Rate												6.30	4.30