Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
Jun. 30, 2019	Jun. 30, 2018
Cash Flows from Operating Activities
Net Income	$ 1,483,267	$ 1,335,320
Items Not Requiring (Providing) Cash
Depreciation, Depletion and Amortization	1,836,899	1,597,265
Impairments	184,486	116,317
Stock-Based Compensation Expenses	77,653	67,289
Deferred Income Taxes	324,294	347,586
Gains (Losses) on Asset Dispositions, Net	4,173	(21,286)
Other, Net	5,439	13,507
Dry Hole Costs	3,863	4,902
Mark-to-Market Commodity Derivative Contracts
Total (Gains) Losses	(156,720)	245,654
Net Cash Received from (Payments for) Settlements of Commodity Derivative Contracts	31,290	(88,334)
Other, Net	1,639	(261)
Changes in Components of Working Capital and Other Assets and Liabilities
Accounts Receivable	(69,746)	(309,751)
Inventories	(11,259)	(192,219)
Accounts Payable	126,853	455,977
Accrued Taxes Payable	53,280	22,535
Other Assets	487,387	(62,843)
Other Liabilities	(58,106)	(53,168)
Changes in Components of Working Capital Associated with Investing and Financing Activities	(22,034)	(27,279)
Net Cash Provided by Operating Activities	4,294,312	3,493,783
Investing Cash Flows
Additions to Oil and Gas Properties	(3,446,497)	(2,980,286)
Additions to Other Property, Plant and Equipment	(116,881)	(144,858)
Proceeds from Sales of Assets	17,642	8,276
Changes in Components of Working Capital Associated with Investing Activities	22,056	27,250
Net Cash Used in Investing Activities	(3,523,680)	(3,089,618)
Repayments of Long-term Debt	(900,000)	0
Financing Cash Flows
Dividends Paid	(254,681)	(203,610)
Treasury Stock Purchased	(8,403)	(32,023)
Proceeds from Stock Options Exercised and Employee Stock Purchase Plan	8,695	11,145
Payments of Debt Issuance Costs	(4,902)	0
Repayment of Finance Lease Liabilities	(6,403)	(3,354)
Changes in Components of Working Capital Associated with Financing Activities	(22)	29
Net Cash Used in Financing Activities	(1,165,716)	(227,813)
Effect of Exchange Rate Changes on Cash	(65)	(2,365)
Increase (Decrease) in Cash and Cash Equivalents	(395,149)	173,987
Cash and Cash Equivalents at Beginning of Period	1,555,634	834,228
Cash and Cash Equivalents at End of Period	$ 1,160,485	$ 1,008,215

The net change during the reporting period of all assets and liabilities used in financing activities.

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