CONSOLIDATED BALANCE SHEETS (USD $) In Millions, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Current assets
Cash and cash equivalents	$ 48	$ 63
Accounts receivable
Customer, net of allowance of less than $1 in 2013 and 2012	239	158
Other, net of allowance of $2 for 2013 and $1 for 2012	41	14
Materials and supplies	20	16
Derivative instruments	47	108
Assets of discontinued operations	88	1,034
Prepaid assets	12	10
Total current assets	495	1,403
Property, plant and equipment, at cost
Oil and natural gas properties	8,371	6,513
Other property, plant and equipment	63	52
Total property, plant and equipment, at cost	8,434	6,565
Less accumulated depreciation, depletion and amortization	818	214
Total property, plant and equipment, net	7,616	6,351
Other assets
Investment in unconsolidated affiliate		220
Derivative instruments	97	88
Assets of discontinued operations		93
Unamortized debt issue costs	111	134
Other	7	4
Total other assets	215	539
Total assets	8,326	8,293
Accounts payable
Trade	140	98
Other	387	302
Derivative instruments	35	17
Accrued interest	54	57
Asset retirement obligations	3	4
Liabilities of discontinued operations	91	211
Other accrued liabilities	65	74
Total current liabilities	775	763
Long-term debt	4,039	4,346
Other long-term liabilities
Derivative instruments		14
Liabilities of discontinued operations		42
Asset retirement obligations	50	40
Other	7	3
Total non-current liabilities	4,096	4,445
Commitments and contingencies (Note 8)
Member's equity	3,455	3,085
Total liabilities and equity	$ 8,326	$ 8,293