Additional Financial Statement Information (Details 2) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012		Dec. 31, 2011
Cash Paid During the Year For [Abstract]
Interest, Net of Amount Capitalized	$ 137	$ 107		$ 32
Income Taxes Paid, Net	165	168		288
Non-Cash Financing and Investing Activities [Abstract]
Increase in CONSOL Installment Payments, Net of Discount	0	0	[1]	639
Increase in FPSO Lease Obligation	$ 96	$ 0	[1]	$ 66	[1]

[1] See Note 3. Property Transactions and Note 10. Long-Term Debt.