Consolidated Condensed Statements of Operations - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
REVENUES
Oil and natural gas net sales to third parties	$ 609	$ 28	$ 1,158	$ 48
Oil and natural gas net sales to related parties		1,079		2,139
Other revenue	25	33	53	74
TOTAL REVENUES	634	1,140	1,211	2,261
COSTS AND OTHER DEDUCTIONS
Production costs	242	270	484	534
General and administrative expenses	85	71	161	140
Depreciation, depletion and amortization	251	293	504	582
Taxes other than on income	53	55	108	107
Exploration expense	7	15	24	46
Interest and debt expense, net	83		162
Other expenses	27	28	51	70
TOTAL COSTS AND OTHER DEDUCTIONS	748	732	1,494	1,479
INCOME / (LOSS) BEFORE INCOME TAXES	(114)	408	(283)	782
Income tax (expense) / benefit	46	(162)	115	(313)
NET INCOME / (LOSS)	$ (68)	$ 246	$ (168)	$ 469
Net income / (loss) per share of common stock
Basic (in dollars per share)	$ (0.18)	$ 0.63	$ (0.44)	$ 1.21
Diluted (in dollars per share)	(0.18)	$ 0.63	(0.44)	$ 1.21
Dividends per common share	$ 0.01		$ 0.02