Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013
Cash Flows from Operating Activities
Net Income	$ 1,367,281	$ 1,154,417
Items Not Requiring (Providing) Cash
Depreciation, Depletion and Amortization	1,943,093	1,756,919
Impairments	152,396	91,515
Stock-Based Compensation Expenses	65,144	57,724
Deferred Income Taxes	479,109	488,632
Gains on Asset Dispositions, Net	(15,354)	(177,386)
Other, Net	984	8,747
Dry Hole Costs	13,906	39,712
Mark-to-Market Commodity Derivative Contracts
Total Losses (Gains)	385,006	(86,534)
Net Cash (Payments for) Received from Settlements of Commodity Derivative Contracts	(120,900)	135,959
Excess Tax Benefits from Stock-Based Compensation	(63,759)	(21,869)
Other, Net	7,223	7,759
Changes in Components of Working Capital and Other Assets and Liabilities
Accounts Receivable	(249,336)	(164,809)
Inventories	(109,756)	22,085
Accounts Payable	347,539	141,369
Accrued Taxes Payable	115,668	24,816
Other Assets	(141,453)	(92,305)
Other Liabilities	57,101	(51,400)
Changes in Components of Working Capital Associated with Investing and Financing Activities	(31,644)	(19,639)
Net Cash Provided by Operating Activities	4,202,248	3,315,712
Investing Cash Flows
Additions to Oil and Gas Properties	(3,724,486)	(3,250,091)
Additions to Other Property, Plant and Equipment	(402,972)	(183,516)
Proceeds from Sales of Assets	74,512	579,941
Changes in Restricted Cash	(91,238)	(52,322)
Changes in Components of Working Capital Associated with Investing Activities	31,620	19,358
Net Cash Used in Investing Activities	(4,112,564)	(2,886,630)
Financing Cash Flows
Long-Term Debt Borrowings	496,220	0
Long-Term Debt Repayments	(500,000)	0
Settlement of Foreign Currency Swap	(31,573)	0
Dividends Paid	(119,684)	(97,006)
Excess Tax Benefits from Stock-Based Compensation	63,759	21,869
Treasury Stock Purchased	(89,524)	(21,094)
Proceeds from Stock Options Exercised and Employee Stock Purchase Plan	10,433	20,773
Debt Issuance Costs	(895)	0
Repayment of Capital Lease Obligation	(2,958)	(2,866)
Other, Net	24	281
Net Cash Used in Financing Activities	(174,198)	(78,043)
Effect of Exchange Rate Changes on Cash	(3,555)	542
(Decrease) Increase in Cash and Cash Equivalents	(88,069)	351,581
Cash and Cash Equivalents at Beginning of Period	1,318,209	876,435
Cash and Cash Equivalents at End of Period	$ 1,230,140	$ 1,228,016