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Consolidated Statements of Cash Flows - USD ($)
$ in Thousands
6 Months Ended
Jun. 30, 2017
Jun. 30, 2016
Cash Flows from Operating Activities    
Net Income (Loss) $ 51,570 $ (764,334)
Items Not Requiring (Providing) Cash    
Depreciation, Depletion and Amortization 1,681,420 1,791,382
Impairments 272,121 144,331
Stock-Based Compensation Expenses 58,061 59,471
Deferred Income Taxes 35,162 (384,294)
Losses on Asset Dispositions, Net (25,674) (6,403)
Other, Net (6,691) 29,991
Dry Hole Costs 27 74
Mark-to-Market Commodity Derivative Contracts    
Total (Gains) Losses (71,466) 38,938
Net Cash Received from Settlements of Commodity Derivative Contracts 2,591 2,852
Excess Tax Benefits from Stock-Based Compensation 0 (11,811)
Other, Net (185) 5,008
Changes in Components of Working Capital and Other Assets and Liabilities    
Accounts Receivable 103,786 (22,572)
Inventories (6,129) 95,813
Accounts Payable 76,704 (203,358)
Accrued Taxes Payable (39,124) 93,320
Other Assets (61,089) (33,589)
Other Liabilities (66,869) 1,565
Changes in Components of Working Capital Associated with Investing and Financing Activities (79,138) (54,453)
Net Cash Provided by Operating Activities 1,976,425 794,737
Investing Cash Flows    
Additions to Oil and Gas Properties (1,885,417) (1,143,549)
Additions to Other Property, Plant and Equipment (88,076) (44,584)
Proceeds from Sales of Assets 175,260 252,529
Changes in Components of Working Capital Associated with Investing Activities 79,138 54,477
Net Cash Used in Investing Activities (1,719,095) (881,127)
Financing Cash Flows    
Net Commercial Paper Repayments 0 (259,718)
Long-Term Debt Borrowings 0 991,097
Long-Term Debt Repayments 0 (400,000)
Dividends Paid (192,984) (184,036)
Excess Tax Benefits from Stock-Based Compensation 0 11,811
Treasury Stock Purchased (21,678) (28,755)
Proceeds from Stock Options Exercised and Employee Stock Purchase Plan 9,608 10,624
Debt Issuance Costs 0 (1,602)
Repayment of Capital Lease Obligation (3,251) (3,150)
Other, Net 0 (24)
Net Cash (Used in) Provided by Financing Activities (208,305) 136,247
Effect of Exchange Rate Changes on Cash 523 11,359
Increase in Cash and Cash Equivalents 49,548 61,216
Cash and Cash Equivalents at Beginning of Period 1,599,895 718,506
Cash and Cash Equivalents at End of Period $ 1,649,443 $ 779,722