Consolidated Condensed Statements of Operations - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
REVENUES AND OTHER
Oil and gas net sales	$ 487	$ 329
Net derivative gains (losses)	73	(25)
Other revenue	30	18
Total revenues and other	590	322
COSTS AND OTHER
Production costs	211	184
General and administrative expenses	67	67
Depreciation, depletion and amortization	140	147
Taxes other than on income	33	39
Exploration expense	6	5
Other expenses, net	22	23
Total costs and other	479	465
OPERATING INCOME (LOSS)	111	(143)
NON-OPERATING INCOME (LOSS)
Interest and debt expense, net	84	74
Net gains on early extinguishment of debt	4	89
Gains on asset divestitures	21
INCOME (LOSS) BEFORE INCOME TAXES	52	(128)
Income tax benefit		78
NET INCOME (LOSS)	52	(50)
Net (income) loss attributable to noncontrolling interest	1
NET INCOME (LOSS) ATTRIBUTABLE TO COMMON STOCK	$ 53	$ (50)
Earnings (loss) per share of common stock
Basic (in dollars per share)	$ 1.23	$ (1.30)
Diluted (in dollars per share)	$ 1.22	$ (1.30)