Contingencies and Commitments (Tables)

12 Months Ended

Dec. 31, 2013

Schedule of Future Minimum Rental Payments for Operating Leases [Table Text Block]

The aggregate undiscounted minimum future lease payments are presented below.



	December 31, 2013
	Rigs		Compressors		Other		Total
	($ in millions)
2014	$	51	$	53	$	13	$	117
2015	11		50		11		72
2016	6		104		9		119
2017	7		23		3		33
2018	1		29		2		32
After 2018	—		1		1		2
Total	$	76	$	260	$	39	$	375

Contractual Obligation, Fiscal Year Maturity Schedule [Table Text Block]

The aggregate undiscounted commitments under our gathering, processing and transportation agreements, excluding any reimbursement from working interest and royalty interest owners, are presented below.



	December 31, 2013
	($ in millions)
2014	$	2,002
2015	1,829
2016	1,921
2017	1,948
2018	1,762
2019 - 2099	7,728
Total	$	17,190

Schedule Of Future Payments For Drilling Contracts Table Text Block

As of December 31, 2013, the aggregate undiscounted minimum future payments under these drilling rig commitments are presented below:



	December 31, 2013
	($ in millions)
2014	$	36
2015	5
Total	$	41