Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Current Assets
Cash and Cash Equivalents	$ 876,435	$ 615,726
Accounts Receivable, Net	1,656,618	1,451,227
Inventories	683,187	590,594
Assets from Price Risk Management Activities	166,135	450,730
Income Taxes Receivable	29,163	26,609
Other	178,346	119,052
Total	3,589,884	3,253,938
Property, Plant and Equipment
Oil and Gas Properties (Successful Efforts Method)	38,126,298	33,664,435
Other Property, Plant and Equipment	2,740,619	2,149,989
Total Property, Plant and Equipment	40,866,917	35,814,424
Less: Accumulated Depreciation, Depletion and Amortization	(17,529,236)	(14,525,600)
Total Property, Plant and Equipment, Net	23,337,681	21,288,824
Other Assets	409,013	296,035
Total Assets	27,336,578	24,838,797
Current Liabilities
Accounts Payable	2,078,948	2,033,615
Accrued Taxes Payable	162,083	147,105
Dividends Payable	45,802	42,578
Liabilities from Price Risk Management Activities	7,617	0
Deferred Income Taxes	22,838	135,989
Current Portion of Long-Term Debt	406,579	0
Other	200,191	163,032
Total	2,924,058	2,522,319
Long-Term Debt	5,905,602	5,009,166
Other Liabilities	894,758	799,189
Deferred Income Taxes	4,327,396	3,867,219
Commitments and Contingencies (Note 7)
Stockholders' Equity
Common Stock, $0.01 Par, 640,000,000 Shares Authorized and 271,958,495 Shares Issued at December 31, 2012 and 269,323,084 Shares Issued at December 31, 2011	202,720	202,693
Additional Paid in Capital	2,500,340	2,272,052
Accumulated Other Comprehensive Income	439,895	401,746
Retained Earnings	10,175,631	9,789,345
Common Stock Held in Treasury, 326,264 December 31, 2012 and 303,633 Shares at December 31, 2011	(33,822)	(24,932)
Total Stockholders' Equity	13,284,764	12,640,904
Total Liabilities and Stockholders' Equity	$ 27,336,578	$ 24,838,797