Commitments and Contingencies (Narrative 1) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2014 Rate	Dec. 31, 2013	Mar. 31, 2013	Dec. 31, 2012
Official Exchange Rate Set By Government (in bolivars per US dollar)	6.3
Foreign Currency Exchange Rate, Translation	11.4
Foreign Currency Transaction Gain (Loss), before Tax	$ 23
Cash and cash equivalents	2,699	2,844	2,636	2,416
Entity Number of Employees	78,870
Percentage Of Employees Represented By Unions Under Collective Bargaining Agreements	18.00%
foreign cash [Member] | 2013 [Member]
Cash and cash equivalents	122
foreign cash [Member] | 2014 [Member]
Cash and cash equivalents	$ 59