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Acquistions	9 Months Ended
Sep. 30, 2011
Significant Acquisitions Disclosure [Abstract]
Significant Acquisitions Disclosure[Text Block]	6. Acquisitions During the first nine months of 2011, we acquired approximately 45,000 net acres in the Eagle Ford shale formation in south Texas for approximately $202 million. This was funded from existing cash and was accounted for as an asset acquisition. Early in the fourth quarter, we closed on the following transactions in Eagle Ford: the previously announced 141,000 net acres from Hilcorp Resources Holdings, LP (“Hilcorp”); additional interests of approximately 19,000 acres net acres; and a gas gathering system. Also, during the fourth quarter, we expect to close on an additional 6,800 net acres in Eagle Ford from tag-along rights. The total acquisition cost for these nearly 167,000 net acres and the gathering system is expected to be approximately $4.5 billion, including projected closing adjustments and future carrying costs. These transactions will be funded largely from existing cash. The acreage includes proved and unproved oil and gas assets, as well as some producing wells. We are in the process of evaluating the acquisitions to determine whether they will be accounted for as business combinations or as asset acquisitions.

Acquistions

9 Months Ended

Sep. 30, 2011

Significant Acquisitions Disclosure [Abstract]

Significant Acquisitions Disclosure[Text Block]

6. Acquisitions

During the first nine months of 2011, we acquired approximately 45,000 net acres in the Eagle Ford shale formation in south Texas for approximately $202 million. This was funded from existing cash and was accounted for as an asset acquisition.

Early in the fourth quarter, we closed on the following transactions in Eagle Ford: the previously announced 141,000 net acres from Hilcorp Resources Holdings, LP (“Hilcorp”); additional interests of approximately 19,000 acres net acres; and a gas gathering system. Also, during the fourth quarter, we expect to close on an additional 6,800 net acres in Eagle Ford from tag-along rights. The total acquisition cost for these nearly 167,000 net acres and the gathering system is expected to be approximately $4.5 billion, including projected closing adjustments and future carrying costs. These transactions will be funded largely from existing cash. The acreage includes proved and unproved oil and gas assets, as well as some producing wells. We are in the process of evaluating the acquisitions to determine whether they will be accounted for as business combinations or as asset acquisitions.