Basis of Presentation and Significant Accounting Policies (Details 5) (USD $)			12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2013 Minimum	Dec. 31, 2013 Maximum
Property, plant and equipment (other than oil and natural gas properties)
Estimated useful lives of the assets			3 years	15 years
Income Taxes
Maximum amount of Texas margin tax liability	$ 1,000,000	$ 1,000,000
Aggregate difference in basis of net assets for financial reporting and tax reporting	$ 1,100,000,000