| Cash and Cash Equivalents | |
| Accounts Receivable, Net | |
| Income Taxes Receivable | |
| Inventories | |
| Deferred Income Taxes | |
| Derivative Instruments | |
| Other Current Assets | |
| Total Current Assets | |
| Properties and Equipment, Net (Successful Efforts Method) | |
| Other Assets | |
| Total Assets | |
| Accounts Payable | |
| Income Taxes Payable | |
| Deferred Income Taxes | |
| Accrued Liabilities | |
| Total Current Liabilities | |
| Pension and Postretirement Benefits | |
| Long-Term Debt | |
| Deferred Income Taxes | |
| Asset Retirement Obligation | |
| Other Liabilities | |
| Total Liabilities | |
| Commitments and Contingencies | |
| Common Stock: Authorized-240,000,000 Shares of $0.10 Par Value in 2011 and 2010 Issued-104,467,059 Shares and 104,210,084 Shares in 2011 and 2010, respectively | |
| Additional Paid-in Capital | |
| Retained Earnings | |
| Accumulated Other Comprehensive Income/(Loss) | |
| Less Treasury Stock, at Cost: 202,200 Shares in 2011 and 2010, respectively | |
| Total Stockholders' Equity | |
| Total Liabilities and Stockholders' Equity |