| Net income | -212.05M |
| Depreciation, depletion and amortization | 797.29M |
| Amortization of deferred major repair costs | 3.79M |
| Expenditures for asset retirements | |
| Dry hole costs | 15.23M |
| Amortization of undeveloped leases | 35.83M |
| Accretion of asset retirement obligations | 35.51M |
| Deferred and noncurrent income tax charges | -345.16M |
| Pretax gain from disposition of assets | |
| Net decrease (increase) in noncash operating working capital | -152.62M |
| Other operating activities, net | |
| Net cash provided by operating activities | |
| Property additions and dry hole costs | |
| Proceeds from sales of assets | 1.15B |
| Purchase of investment securities | -651.22M |
| Proceeds from maturity of investment securities | 712.86M |
| Expenditures for major repairs | |
| Other - net | -7.23M |
| Net cash required by investing activities | |
| Borrowings (repayments) of notes payable | |
| Repayment of nonrecourse debt of a subsidiary | |
| Proceeds from exercise of stock options and employee stock purchase plans | |
| Excess tax benefits related to exercise of stock options | |
| Withholding tax on stock-based incentive awards | -1.14M |
| Issue cost of debt facility | -13.97M |
| Cash dividends paid | -163.59M |
| Net cash provided (required) by financing activities | |
| Effect of exchange rate changes on cash and cash equivalents | 7.27M |
| Net increase in cash and cash equivalents | 469.91M |
| Cash and cash equivalents, beginning | 283.18M |
| Cash and cash equivalents, ending | 753.09M |