Consolidated Balance Sheets (USD $) In Thousands	6 Months Ended
	Jun. 30, 2011	Dec. 31, 2010
Current Assets
Cash and Cash Equivalents	$ 1,577,438	$ 788,853
Accounts Receivable, Net	1,279,740	1,113,279
Inventories	540,094	415,792
Assets from Price Risk Management Activities	109,225	48,153
Income Taxes Receivable	27,694	54,916
Deferred Income Taxes	0	9,260
Other	103,759	97,193
Total	3,637,950	2,527,446
Property, Plant and Equipment
Oil and Gas Properties (Successful Efforts Method)	31,588,860	29,263,809
Other Property, Plant and Equipment	1,871,497	1,733,073
Total Property, Plant and Equipment	33,460,357	30,996,882
Less: Accumulated Depreciation, Depletion and Amortization	(13,463,534)	(12,315,982)
Total Property, Plant and Equipment, Net	19,996,823	18,680,900
Other Assets	324,606	415,887
Total Assets	23,959,379	21,624,233
Current Liabilities
Accounts Payable	1,870,172	1,664,944
Accrued Taxes Payable	148,645	82,168
Dividends Payable	42,976	38,962
Liabilities from Price Risk Management Activities	12,393	28,339
Deferred Income Taxes	50,180	41,703
Current Portion of Long-Term Debt	220,000	220,000
Other	131,872	143,983
Total	2,476,238	2,220,099
Long-Term Debt	5,006,251	5,003,341
Other Liabilities	718,696	667,455
Deferred Income Taxes	3,681,009	3,501,706
Commitments and Contingencies (Note 9)
Stockholders' Equity
Common Stock, $0.01 Par, 640,000,000 Shares Authorized and 268,698,963 Shares Issued at June 30, 2011 and 254,223,521 Shares Issued at December 31, 2010	202,687	202,542
Additional Paid in Capital	2,181,157	729,992
Accumulated Other Comprehensive Income	492,880	440,071
Retained Earnings	9,213,356	8,870,179
Common Stock Held in Treasury, 143,309 Shares at June 30, 2011 and 146,186 Shares at December 31, 2010	(12,895)	(11,152)
Total Stockholders' Equity	12,077,185	10,231,632
Total Liabilities and Stockholders' Equity	$ 23,959,379	$ 21,624,233