Subsequent Events (Notes)

6 Months Ended

Jun. 30, 2013

Subsequent Events [Abstract]

Subsequent Events [Text Block]

Subsequent Events

On July 12, 2013, we sold assets in the Haynesville Shale to EXCO Operating Company, LP (EXCO) for net proceeds of approximately $257 million. Receipt of up to an additional $32 million of net proceeds is subject to customary post-closing contingencies. The assets sold included our operated and non-operated interests in approximately 9,600 net acres in DeSoto and Caddo parishes, Louisiana. Average net daily production from the Haynesville properties was approximately 90 mmcfe during June 2013.

On July 15, 2013, we retired at maturity the remaining $247 million aggregate principal amount outstanding of our 7.625% Senior Notes due 2013.

On July 31, 2013, we sold assets in the northern Eagle Ford Shale to EXCO for net proceeds of approximately $617 million. Receipt of up to an additional $70 million of net proceeds is subject to customary post-closing contingencies. The assets sold included approximately 55,000 net acres in Zavala, Dimmit, La Salle and Frio counties, Texas, including approximately 120 producing wells with average net daily production of approximately 6,150 barrels of oil equivalent during June 2013.

On August 1, 2013, CMD sold its wholly owned midstream subsidiary, Mid-America Midstream Gas Services, L.L.C. (MAMGS), to SemGas, L.P. (SemGas), a wholly owned subsidiary of SemGroup Corporation, for net proceeds of approximately $306 million, subject to post-closing adjustments. MAMGS owns certain gathering and processing assets located in the Mississippi Lime play, and the transaction with SemGas included a new long-term fixed-fee gathering and processing agreement covering acreage dedication areas in the Mississippi Lime play.