Acquisitions And Divestitures (Tables)

9 Months Ended

Sep. 30, 2011

Acquisitions And Divestitures [Abstract]

Summarizes The Assets Acquired And Liabilities Assumed

	As of June 6, 2011
	($ in millions)
Current assets		$	46
Drilling rigs and equipment			287
Goodwill			42
Intangible assets			10
Other			12
Total assets acquired			397
Current liabilities			33
Long-term liabilities			1
Deferred income taxes			24
Total liabilities assumed			58
Net assets acquired		$	339

Drilling And Completion Costs Associated To Joint Ventures

Primary       Play	Joint Venture     Partner(a)	Joint Venture Date	Interest   Acquired	Cash Proceeds Received at Closing		Total Drilling Carries		Drilling Carries   Remaining(b)
				($ in millions)
Niobrara	CNOOC	February 2011	33.3%	$	570	$	697	$	607
Eagle Ford & Pearsall	CNOOC	November 2010	33.3%		1,120		1,080		467
Barnett	TOT	January 2010	25.0%		800		1,450		471	(c)
Marcellus	STO	November 2008	32.5%		1,250		2,125		564
Fayetteville	BP	September 2008	25.0%		1,100		800		—
Haynesville & Bossier	PXP	July 2008	20.0%		1,650		1,508		—
				$	6,490	$	7,660	$	2,109

(a) Joint venture partners include CNOOC Limited (CNOOC), Total S.A. (TOT), Statoil (STO), BP America (BP) and Plains Exploration & Production Company (PXP).

(b) As of September 30, 2011.

(c) On October 24, 2011, Total accelerated the payment of its remaining joint venture carry in exchange for an approximate 9% reduction to the total amount of drilling carry obligation due to us. See Note 13 for this subsequent event.

Schedule Of Production Payments

					Proved Reserves				Original
Date of VPP	Location	Proceeds			(at time of sale)		$ / mcfe		Term
		($ in millions)			(bcfe)				(years)
May 2011	Mid-Continent		$	853		177		$    4.82		10
September 2010	Barnett Shale			1,150		390		$    2.93		5
June 2010	Permian Basin			335		38		$    8.73		10
February 2010	East Texas and the Texas Gulf Coast			180		46		$    3.95		10
August 2009	South Texas			370		68		$    5.46		7.5
December 2008	Anadarko and Arkoma Basins			412		98		$    4.19		8
August 2008	Anadarko Basin			600		93		$    6.38		11
May 2008	Texas, Oklahoma and Kansas			622		94		$    6.53		11
December 2007	Kentucky and West Virginia			1,100		208		$    5.29		15
			$	5,622		1,212		$    4.64