Consolidated Statements of Cash Flows - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Cash Flows from Operating Activities
Net Income (Loss)		$ (1,096,686)	$ (4,524,515)	$ 2,915,487
Items Not Requiring (Providing) Cash
Depreciation, Depletion and Amortization		3,553,417	3,313,644	3,997,041
Impairments		620,267	6,613,546	743,575
Stock-Based Compensation Expenses		128,090	130,577	145,086
Deferred Income Taxes		(515,206)	(2,482,307)	1,704,946
(Gains) Losses on Asset Dispositions, Net		(205,835)	8,798	(507,590)
Other, Net		61,690	11,896	48,138
Dry Hole Costs	[1]	10,657	14,746	48,490
Mark-to-Market Commodity Derivative Contracts
Total Losses (Gains)		99,608	(61,924)	(834,273)
Net Cash (Payments) Received from Settlements of Commodity Derivative Contracts		(22,219)	730,114	34,007
Excess Tax Benefits from Stock-Based Compensation		(29,357)	(26,058)	(99,459)
Other, Net		10,971	12,532	13,009
Changes in Components of Working Capital and Other Assets and Liabilities
Accounts Receivable		(232,799)	641,412	84,982
Inventories		170,694	58,450	(161,958)
Accounts Payable		(74,048)	(1,409,197)	543,630
Accrued Taxes Payable		92,782	11,798	16,486
Other Assets		(40,636)	118,143	(14,448)
Other Liabilities		(16,225)	(66,257)	75,420
Changes in Components of Working Capital Associated with Investing and Financing Activities		(156,102)	499,767	(103,414)
Net Cash Provided by Operating Activities		2,359,063	3,595,165	8,649,155
Investing Cash Flows
Additions to Oil and Gas Properties		(2,489,756)	(4,725,150)	(7,519,667)
Additions to Other Property, Plant and Equipment		(93,039)	(288,013)	(727,138)
Proceeds from Sales of Assets		1,119,215	192,807	569,332
Changes in Restricted Cash		0	0	60,385
Payments to Acquire Businesses, Net of Cash Acquired		54,534	0	0
Changes in Components of Working Capital Associated with Investing Activities		156,102	(499,900)	103,523
Net Cash Used in Investing Activities		(1,252,944)	(5,320,256)	(7,513,565)
Financing Cash Flows
Repayments of Commercial Paper		(259,718)
Proceeds from Issuance of Commercial Paper			259,718	0
Long-Term Debt Borrowings		991,097	990,225	496,220
Long-Term Debt Repayments		(563,829)	(500,000)	(500,000)
Settlement of Foreign Currency Swap		0	0	(31,573)
Dividends Paid		(372,845)	(367,005)	(279,695)
Excess Tax Benefits from Stock-Based Compensation		29,357	26,058	99,459
Treasury Stock Purchased		(82,125)	(48,791)	(127,424)
Proceeds from Stock Options Exercised and Employee Stock Purchase Plan		23,296	22,690	22,249
Debt Issuance Costs		(1,602)	(5,951)	(895)
Repayment of Capital Lease Obligation		(6,353)	(6,156)	(5,966)
Other, Net		0	133	(109)
Net Cash (Used in) Provided by Financing Activities		(242,722)	370,921	(327,734)
Effect of Exchange Rate Changes on Cash		17,992	(14,537)	(38,852)
Increase (Decrease) in Cash and Cash Equivalents		881,389	(1,368,707)	769,004
Cash and Cash Equivalents at Beginning of Year		718,506	2,087,213	1,318,209
Cash and Cash Equivalents at End of Year		$ 1,599,895	$ 718,506	$ 2,087,213

[1] Excludes gains or losses on the mark-to-market of financial commodity derivative contracts, gains or losses on sales of reserves and related assets, interest charges and general corporate expenses for each of the three years in the period ended December 31, 2016.