Consolidated Balance Sheets (USD $) In Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2011	Dec. 31, 2010
Current Assets
Cash and Cash Equivalents	$ 1,386,728	$ 788,853
Accounts Receivable, Net	1,249,649	1,113,279
Inventories	580,355	415,792
Assets from Price Risk Management Activities	364,991	48,153
Income Taxes Receivable	28,013	54,916
Deferred Income Taxes	0	9,260
Other	125,626	97,193
Total	3,735,362	2,527,446
Property, Plant and Equipment
Oil and Gas Properties (Successful Efforts Method)	32,196,279	29,263,809
Other Property, Plant and Equipment	1,993,824	1,733,073
Total Property, Plant and Equipment	34,190,103	30,996,882
Less: Accumulated Depreciation, Depletion and Amortization	(13,453,905)	(12,315,982)
Total Property, Plant and Equipment, Net	20,736,198	18,680,900
Other Assets	323,118	415,887
Total Assets	24,794,678	21,624,233
Current Liabilities
Accounts Payable	1,926,455	1,664,944
Accrued Taxes Payable	157,297	82,168
Dividends Payable	43,015	38,962
Liabilities from Price Risk Management Activities	0	28,339
Deferred Income Taxes	139,646	41,703
Current Portion of Long-Term Debt	220,000	220,000
Other	179,910	143,983
Total	2,666,323	2,220,099
Long-Term Debt	5,007,746	5,003,341
Other Liabilities	768,518	667,455
Deferred Income Taxes	3,858,243	3,501,706
Commitments and Contingencies (Note 9)
Stockholders' Equity
Common Stock, $0.01 Par, 640,000,000 Shares Authorized and 269,124,759 Shares Issued at September 30, 2011 and 254,223,521 Shares Issued at December 31, 2010	202,691	202,542
Additional Paid in Capital	2,230,600	729,992
Accumulated Other Comprehensive Income	372,448	440,071
Retained Earnings	9,711,207	8,870,179
Common Stock Held in Treasury, 281,595 Shares at September 30, 2011 and 146,186 Shares at December 31, 2010	(23,098)	(11,152)
Total Stockholders' Equity	12,493,848	10,231,632
Total Liabilities and Stockholders' Equity	$ 24,794,678	$ 21,624,233