CONSOLIDATED STATEMENTS OF INCOME (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended			9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012		Sep. 30, 2013		Sep. 30, 2012
REVENUES
Sales and other operating revenues	$ 2,904,791	$ 2,655,356	[1]	$ 8,276,488		$ 7,979,649	[1]
Loss on sale of assets	(34)	(120)	[1]	(320)		(69)	[1]
Interest and other income (expense)	53,100	(8,508)	[1]	61,722		5,407	[1]
Total revenues	2,957,857	2,646,728	[1]	8,337,890	[1]	7,984,987	[1]
COSTS AND EXPENSES
Crude oil and product purchases	1,459,649	1,445,983	[1]	4,039,634		4,358,893	[1]
Operating expenses	355,004	340,813	[1]	1,134,710		1,009,663	[1]
Exploration expenses, including undeveloped lease amortization	147,845	94,063	[1]	345,110		243,714	[1]
Selling and general expenses	106,102	66,143	[1]	285,108		197,008	[1]
Depreciation, depletion and amortization	406,565	311,255	[1]	1,174,500		916,937	[1]
Impairment of properties	0	0	[1]	21,587		0	[1]
Accretion of asset retirement obligations	12,539	9,760	[1]	36,396		28,316	[1]
Interest expense	33,535	12,941	[1]	90,156		36,278	[1]
Interest capitalized	(13,011)	(11,461)	[1]	(40,877)		(27,360)	[1]
Total costs and expenses	2,508,228	2,269,497	[1]	7,086,324		6,763,449	[1]
Income from continuing operations before income taxes	449,629	377,231	[1]	1,251,566		1,221,538	[1]
Income tax expense	197,514	165,551	[1]	566,646		503,252	[1]
Income from continuing operations	252,115	211,680	[1]	684,920		718,286	[1]
Income from discontinued operations, net of taxes	32,694	15,001	[1]	363,132		93,903	[1]
NET INCOME	$ 284,809	$ 226,681	[1]	$ 1,048,052	[1]	$ 812,189	[1]
INCOME PER COMMON SHARE - BASIC
Income from continuing operations	$ 1.35	$ 1.09	[1]	$ 3.63		$ 3.70	[1]
Income from discontinued operations	$ 0.17	$ 0.08	[1]	$ 1.92		$ 0.48	[1]
Net income	$ 1.52	$ 1.17	[1]	$ 5.55		$ 4.18	[1]
INCOME PER COMMON SHARE - DILUTED
Income from continuing operations	$ 1.34	$ 1.08	[1]	$ 3.60		$ 3.69	[1]
Income from discontinued operations	$ 0.17	$ 0.08	[1]	$ 1.91		$ 0.48	[1]
Net income	$ 1.51	$ 1.16	[1]	$ 5.51		$ 4.17	[1]
Average common shares outstanding
Basic	186,938,328	194,290,277	[1]	188,914,000		194,126,104	[1]
Diluted	188,337,511	195,057,952	[1]	190,245,166		194,874,572	[1]

[1] Reclassified to conform to current presentation.