Condensed Consolidated Statements of Operations (Unaudited) (USD $) In Millions, except Per Share data	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Revenues
Sales	$ 1,737.3	$ 1,663.4	$ 5,151.8	$ 4,618.3
Other revenues	298.6	201.3	637.0	423.4
Total revenues	2,035.9	1,864.7	5,788.8	5,041.7
Costs and expenses
Operating costs and expenses	1,458.8	1,243.3	4,119.7	3,526.7
Depreciation, depletion and amortization	113.7	116.7	327.8	327.3
Asset retirement obligation expense	15.0	9.9	43.9	30.3
Selling and administrative expenses	71.2	54.1	191.4	163.6
Other operating (income) loss:
Net gain on disposal or exchange of assets	(1.7)	(6.7)	(31.4)	(15.4)
Loss (income) from equity affiliates	3.2	2.7	9.0	(2.1)
Operating profit	375.7	444.7	1,128.4	1,011.3
Interest expense	59.2	62.2	159.3	170.1
Interest income	(4.1)	(2.8)	(11.7)	(5.4)
Income from continuing operations before income taxes	320.6	385.3	980.8	846.6
Income tax provision	37.1	147.7	224.7	257.2
Income from continuing operations, net of income taxes	283.5	237.6	756.1	589.4
Loss from discontinued operations, net of income taxes	(2.0)	(1.3)	(3.7)	(2.2)
Net income	281.5	236.3	752.4	587.2
Less: Net income attributable to noncontrolling interests	7.4	12.2	17.0	23.2
Net income attributable to common stockholders	$ 274.1	$ 224.1	$ 735.4	$ 564.0
Income From Continuing Operations
Basic earnings per share	$ 1.02	$ 0.84	$ 2.73	$ 2.11
Diluted earnings per share	$ 1.01	$ 0.83	$ 2.72	$ 2.09
Net Income Attributable to Common Stockholders
Basic earnings per share	$ 1.01	$ 0.84	$ 2.72	$ 2.10
Diluted earnings per share	$ 1.00	$ 0.83	$ 2.71	$ 2.08
Dividends declared per share	$ 0.085	$ 0.070	$ 0.255	$ 0.210