Consolidated Statements of Income and Comprehensive Income - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Net Operating Revenues
Crude Oil and Condensate	$ 1,181,092	$ 2,671,502	$ 3,894,092	$ 7,687,579
Natural Gas Liquids	95,217	258,927	311,137	753,135
Natural Gas	281,837	443,108	843,657	1,508,892
Gains on Mark-to-Market Commodity Derivative Contracts	29,239	469,125	56,954	84,119
Gathering, Processing and Marketing	572,217	1,196,933	1,820,843	3,240,139
Gains (Losses) on Asset Dispositions, Net	(1,185)	60,346	(5,142)	75,700
Other, Net	14,011	18,675	39,126	40,279
Total	2,172,428	5,118,616	6,960,667	13,389,843
Operating Expenses
Lease and Well	283,221	368,340	934,366	1,035,632
Transportation Costs	203,594	246,067	641,739	729,883
Gathering and Processing Costs	35,497	41,621	106,503	108,015
Exploration Costs	31,344	48,955	114,548	139,221
Dry Hole Costs	198	16,359	14,317	30,265
Impairments	6,307,420	55,542	6,445,375	207,938
Marketing Costs	615,303	1,213,652	1,924,134	3,263,471
Depreciation, Depletion and Amortization	722,172	1,040,018	2,544,187	2,983,111
General and Administrative	90,959	96,931	257,580	270,725
Taxes Other Than Income	105,677	204,969	334,244	606,411
Total	8,395,385	3,332,454	13,316,993	9,374,672
Operating Income (Loss)	(6,222,957)	1,786,162	(6,356,326)	4,015,171
Other Income (Expense), Net	8,607	(21,338)	7,996	(16,726)
Income (Loss) Before Interest Expense and Income Taxes	(6,214,350)	1,764,824	(6,348,330)	3,998,445
Interest Expense
Interest Expense, Net	60,571	49,704	174,400	151,723
Income (Loss) Before Income Taxes	(6,274,921)	1,715,120	(6,522,730)	3,846,722
Income Tax Provision (Benefit)	(2,199,182)	611,502	(2,282,511)	1,375,823
Net Income (Loss)	$ (4,075,739)	$ 1,103,618	$ (4,240,219)	$ 2,470,899
Net Income (Loss) Per Share
Basic	$ (7.47)	$ 2.03	$ (7.77)	$ 4.55
Diluted	(7.47)	2.01	(7.77)	4.51
Dividends Declared per Common Share	$ 0.1675	$ 0.1675	$ 0.5025	$ 0.4175
Average Number of Common Shares
Basic	545,920	543,984	545,466	543,086
Diluted	545,920	549,518	545,466	548,401
Comprehensive Income (Loss)
Net Income (Loss)	$ (4,075,739)	$ 1,103,618	$ (4,240,219)	$ 2,470,899
Other Comprehensive Income (Loss)
Foreign Currency Translation Adjustments	(7,004)	(38,886)	(11,767)	(27,438)
Other	28	23	(156)	(671)
Other Comprehensive Loss	(6,976)	(38,863)	(11,923)	(28,109)
Comprehensive Income (Loss)	$ (4,082,715)	$ 1,064,755	$ (4,252,142)	$ 2,442,790