Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019
Cash Flows from Operating Activities
Net Income (Loss)	$ (899,571)	$ 1,483,267
Items Not Requiring (Providing) Cash
Depreciation, Depletion and Amortization	1,706,739	1,836,899
Impairments	1,878,350	184,486
Stock-Based Compensation Expenses	79,643	77,653
Deferred Income Taxes	(207,692)	324,294
Gains (Losses) on Asset Dispositions, Net	29,693	4,173
Other, Net	171	5,439
Dry Hole Costs	459	3,863
Mark-to-Market Commodity Derivative Contracts
Total Gains	(1,079,411)	(156,720)
Net Cash Received from Settlements of Commodity Derivative Contracts	723,761	31,290
Other, Net	(720)	1,639
Changes in Components of Working Capital and Other Assets and Liabilities
Accounts Receivable	1,191,457	(69,746)
Inventories	84,575	(11,259)
Accounts Payable	(1,184,718)	126,853
Accrued Taxes Payable	(61,087)	53,280
Other Assets	252,978	487,387
Other Liabilities	(64,403)	(58,106)
Changes in Components of Working Capital Associated with Investing and Financing Activities	282,154	(22,034)
Net Cash Provided by Operating Activities	2,672,992	4,294,312
Investing Cash Flows
Additions to Oil and Gas Properties	(1,990,033)	(3,446,497)
Additions to Other Property, Plant and Equipment	(147,366)	(116,881)
Proceeds from Sales of Assets	43,368	17,642
Changes in Components of Working Capital Associated with Investing Activities	(282,154)	22,056
Net Cash Used in Investing Activities	(2,376,185)	(3,523,680)
Financing Cash Flows
Long-Term Debt Borrowings	1,483,852	0
Long-Term Debt Repayments	(1,000,000)	(900,000)
Dividends Paid	(384,100)	(254,681)
Treasury Stock Purchased	(5,057)	(8,403)
Proceeds from Stock Options Exercised and Employee Stock Purchase Plan	8,614	8,695
Debt Issuance Costs	(2,635)	(4,902)
Repayment of Finance Lease Liabilities	(8,445)	(6,403)
Changes in Components of Working Capital Associated with Financing Activities	0	(22)
Net Cash Provided by (Used in) Financing Activities	92,229	(1,165,716)
Effect of Exchange Rate Changes on Cash	(507)	(65)
Increase (Decrease) in Cash and Cash Equivalents	388,529	(395,149)
Cash and Cash Equivalents at Beginning of Period	2,027,972	1,555,634
Cash and Cash Equivalents at End of Period	$ 2,416,501	$ 1,160,485