Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Cash Flows from Operating Activities
Net Income (Loss)	$ (942,038)	$ 2,098,389
Items Not Requiring (Providing) Cash
Depreciation, Depletion and Amortization	2,529,789	2,790,496
Impairments	1,957,340	289,761
Stock-Based Compensation Expenses	113,454	132,323
Deferred Income Taxes	(241,003)	508,576
Gains (Losses) on Asset Dispositions, Net	(41,283)	3,650
Other, Net	1,636	4,155
Dry Hole Costs	13,063	28,001
Total Gains	1,075,433	242,622
Net Cash Received from Settlements of Commodity Derivative Contracts	998,894	139,708
Mark-to-Market Commodity Derivative Contracts
Other, Net	(1,185)	1,215
Changes in Components of Working Capital and Other Assets and Liabilities
Accounts Receivable	930,628	(5,855)
Inventories	92,014	55,598
Accounts Payable	(1,222,473)	134,253
Accrued Taxes Payable	12,395	88,047
Other Assets	414,857	394,573
Other Liabilities	(12,739)	(18,315)
Changes in Components of Working Capital Associated with Investing and Financing Activities	276,063	(38,677)
Net Cash Provided by Operating Activities	3,886,545	6,355,976
Investing Cash Flows
Additions to Oil and Gas Properties	(2,458,520)	(4,866,882)
Additions to Other Property, Plant and Equipment	(165,018)	(187,350)
Proceeds from Sales of Assets	188,943	35,409
Changes in Components of Working Capital Associated with Investing Activities	(276,063)	38,677
Net Cash Used in Investing Activities	(2,710,658)	(4,980,146)
Financing Cash Flows
Long-Term Debt Borrowings	1,483,852	0
Long-Term Debt Repayments	(1,000,000)	(900,000)
Dividends Paid	(601,242)	(420,851)
Treasury Stock Purchased	(14,821)	(22,238)
Proceeds from Stock Options Exercised and Employee Stock Purchase Plan	8,614	9,558
Debt Issuance Costs	(2,635)	(5,016)
Repayment of Finance Lease Liabilities	(13,309)	(9,638)
Net Cash Used in Financing Activities	(139,541)	(1,348,185)
Effect of Exchange Rate Changes on Cash	1,238	(174)
Increase in Cash and Cash Equivalents	1,037,584	27,471
Cash and Cash Equivalents at End of Period	3,065,556	1,583,105
Cash and Cash Equivalents at Beginning of Period	$ 2,027,972	$ 1,555,634