| Revenues and other income | — | — | — |
| Natural gas, NGLs and oil sales | 2,213.85a | 2,334.66a | 4,911.09a |
| Derivative fair value income (loss) | 56.73a | 821.15a | -1,188.51a |
| Brokered natural gas and marketing | 133.05a | 206.55a | 419.78a |
| Other income | 13.46a | 12.51a | 4.85a |
| Total revenues and other income | 2,417.08a | 3,374.87a | 4,147.21a |
| Costs and expenses | — | — | — |
| Direct operating | -95.32a | -96.09a | -84.29a |
| Transportation, gathering, processing and compression | -1,177.93a | -1,113.94a | -1,242.94a |
| Taxes other than income | -21.63a | -23.73a | -35.37a |
| Brokered natural gas and marketing | -140.55a | -202.88a | -427.05a |
| Exploration | -26.84a | -26.53a | -26.77a |
| Abandonment and impairment of unproved properties | -8.42a | -46.36a | -28.61a |
| General and administrative | -172.14a | -164.74a | -168.09a |
| Exit costs | -37.21a | -99.94a | -70.34a |
| Deferred compensation plan | -9.59a | -26.59a | -61.88a |
| Interest | -118.76a | -124a | -165.15a |
| (Gain) loss on early extinguishment of debt | -0.26a | -0.44a | 69.49a |
| Depletion, depreciation and amortization | -358.36a | -350.17a | -353.42a |
| Total costs and expenses | -2,166.48a | -2,274.53a | -2,733.38a |
| Income before income taxes | 250.61a | 1,100.34a | 1,413.83a |
| Income tax (benefit) expense | — | — | — |
| Current | -8.17a | -1.55a | -14.69a |
| Deferred | -23.9a | -227.65a | -215.77a |
| Income tax (benefit) expense | -15.74a | -229.2a | -230.46a |
| Net income | 266.34a | 871.14a | 1,183.37a |