| Assets | — | — |
| Current assets | — | — |
| Cash and cash equivalents | 0.44a | 21.32a |
| Accounts and notes receivable | — | — |
| Trade, net | 116.12a | 348.46a |
| Other receivables, net | 17.87a | 6.18a |
| Supplies inventories | 19.85a | 27.16a |
| Derivative instruments | 252.52a | 154.47a |
| Prepaid expenses | 14.98a | 16.21a |
| Total current assets | 421.79a | 573.8a |
| Property, plant and equipment | — | — |
| Property, plant and equipment | 12,537.12a | 11,907.7a |
| Less - accumulated depreciation, depletion and amortization | 5,194.49a | 4,811.19a |
| Total property, plant and equipment - net | 7,342.63a | 7,096.51a |
| Other non-current assets | — | — |
| Operating lease right-of-use assets | 139.47a | 174.85a |
| Derivative instruments | 280.53a | 244.93a |
| Goodwill | 323.31a | 323.31a |
| Other intangible assets | 70.44a | 76.99a |
| Other | 48.49a | 25.38a |
| Total other non-current assets | 862.24a | 845.46a |
| Total assets | 8,626.66a | 8,515.77a |
| Liabilities and equity | — | — |
| Current liabilities | — | — |
| Accounts payable | 147.36a | 191.34a |
| Derivative instruments | 61.1a | 782.65a |
| Current portion of finance lease obligations | 1.86a | 0.88a |
| Current portion of long-term debt | 325.67a | 0a |
| Current portion of operating lease obligations | 53.79a | 47.44a |
| Other accrued liabilities | 233.21a | 290.49a |
| Total current liabilities | 823a | 1,312.8a |
| Non-current liabilities | — | — |
| Long-term debt | 1,888.71a | 2,205.74a |
| Finance lease obligations | 5.5a | 1.97a |
| Operating lease obligations | 89.53a | 132.11a |
| Derivative instruments | 526.55a | 1,517.02a |
| Deferred income taxes | 729.45a | 232.28a |
| Asset retirement obligations | 105.32a | 89.08a |
| Other | 97.58a | 74.32a |
| Total non-current liabilities | 3,442.64a | 4,252.51a |
| Total liabilities | 4,265.64a | 5,565.31a |
| Stockholders' equity | — | — |
| Common stock | 1.55a | 1.71a |
| Capital in excess of par value | 2,384.91a | 2,506.27a |
| Preferred stock | 0a | 0a |
| Retained earnings | 1,981.86a | 448.99a |
| Accumulated other comprehensive loss | -7.3a | -6.51a |
| Total stockholders' equity | 4,361.02a | 2,950.46a |
| Total liabilities and stockholders' equity | 8,626.66a | 8,515.77a |