Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Cash Flows from Operating Activities
Net Loss	$ (471,776)	$ (169,748)
Items Not Requiring (Providing) Cash
Depreciation, Depletion and Amortization	928,891	912,788
Impairments	71,617	69,436
Stock-Based Compensation Expenses	32,380	33,052
Deferred Income Taxes	(196,696)	(97,241)
Gains on Asset Dispositions, Net	(9,147)	(1,607)
Other, Net	5,442	12,469
Dry Hole Costs	246	14,670
Mark-to-Market Commodity Derivative Contracts
Total Gains	(5,435)	(76,208)
Net Cash Received from Settlements of Commodity Derivative Contracts	17,687	367,707
Excess Tax Benefits from Stock-Based Compensation	0	(8,858)
Other, Net	1,407	1,616
Changes in Components of Working Capital and Other Assets and Liabilities
Accounts Receivable	132,398	353,100
Inventories	57,578	(62,172)
Accounts Payable	(289,627)	(677,875)
Accrued Taxes Payable	2,460	2,105
Other Assets	3,946	59,176
Other Liabilities	7,992	(31,855)
Changes in Components of Working Capital Associated with Investing and Financing Activities	2,228	259,992
Net Cash Provided by Operating Activities	291,591	960,547
Investing Cash Flows
Additions to Oil and Gas Properties	(547,399)	(1,428,733)
Additions to Other Property, Plant and Equipment	(25,792)	(116,866)
Proceeds from Sales of Assets	6,667	1,118
Changes in Components of Working Capital Associated with Investing Activities	(2,228)	(259,741)
Net Cash Used in Investing Activities	(568,752)	(1,804,222)
Financing Cash Flows
Net Commercial Paper Borrowings	(259,718)	0
Long-Term Debt Borrowings	991,097	990,225
Long-Term Debt Repayments	(400,000)	0
Dividends Paid	(92,170)	(91,661)
Excess Tax Benefits from Stock-Based Compensation	0	8,858
Treasury Stock Purchased	(12,672)	(15,459)
Proceeds from Stock Options Exercised and Employee Stock Purchase Plan	2,688	3,984
Debt Issuance Costs	(1,592)	(1,603)
Repayment of Capital Lease Obligation	(1,569)	(1,521)
Other, Net	0	(251)
Net Cash Provided by Financing Activities	226,064	892,572
Effect of Exchange Rate Changes on Cash	1,072	(8,691)
(Decrease) Increase in Cash and Cash Equivalents	(50,025)	40,206
Cash and Cash Equivalents at Beginning of Period	718,506	2,087,213
Cash and Cash Equivalents at End of Period	$ 668,481	$ 2,127,419