Subsequent Event

9 Months Ended

Sep. 30, 2011

Subsequent Event [Abstract]

Subsequent Event

17. Subsequent Events

     In October 2011, the Corporation completed the acquisition of a 50% undivided interest in CONSOL Energy Inc.’s (CONSOL) approximately 200,000 acres, in the Utica Shale in eastern Ohio, for $59 million in cash at closing and funding of 50% of CONSOL’s share of the drilling costs up to $534 million within a 5-year period. Also, in October 2011, the Corporation acquired for $116 million in cash an additional 4% interest in the South Arne Field, offshore Denmark, increasing its interest to 62% from 58%.