Consolidated Statements of Income (USD $) In Thousands, except Share data	3 Months Ended	9 Months Ended
Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Net Operating Revenues
Crude Oil and Condensate	$ 953,154	$ 506,368	$ 2,649,034	$ 1,368,338
Natural Gas Liquids	206,572	107,482	539,104	314,750
Natural Gas	576,803	602,242	1,760,715	1,832,578
Gains on Mark-to-Market Commodity Derivative Contracts	357,664	60,998	480,539	105,816
Gathering, Processing and Marketing	578,022	233,971	1,461,303	601,790
Gains on Asset Dispositions, Net	207,468	64,809	442,981	72,441
Other, Net	6,061	6,205	19,424	15,023
Total	2,885,744	1,582,075	7,353,100	4,310,736
Operating Expenses
Lease and Well	248,926	180,921	680,710	507,647
Transportation Costs	108,678	103,262	308,276	286,318
Gathering and Processing Costs	18,532	18,472	55,444	47,353
Exploration Costs	48,469	47,307	140,616	148,635
Dry Hole Costs	22,604	2,700	47,231	45,095
Impairments	83,431	352,908	531,413	502,865
Marketing Costs	572,604	231,758	1,427,450	591,735
Depreciation, Depletion and Amortization	651,684	500,888	1,822,854	1,398,137
General and Administrative	82,260	81,310	219,703	206,470
Taxes Other Than Income	98,526	74,244	308,669	227,773
Total	1,935,714	1,593,770	5,542,366	3,962,028
Operating Income (Loss)	950,030	(11,695)	1,810,734	348,708
Other Income, Net	1,377	5,772	11,205	7,910
Income (Loss) Before Interest Expense and Income Taxes	951,407	(5,923)	1,821,939	356,618
Interest Expense, Net	52,186	32,890	153,772	88,215
Income (Loss) Before Income Taxes	899,221	(38,813)	1,668,167	268,403
Income Tax Provision	358,343	32,093	697,742	161,422
Net Income (Loss)	$ 540,878	$ (70,906)	$ 970,425	$ 106,981
Net Income Per Share
Basic	$ 2.03	$ (0.28)	$ 3.71	$ 0.43
Diluted	$ 2.01	$ (0.28)	$ 3.66	$ 0.42
Dividends Declared per Common Share	$ 0.160	$ 0.155	$ 0.480	$ 0.465
Average Number of Common Shares
Basic	266,053	251,015	261,664	250,719
Diluted	269,292	251,015	265,245	254,444

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