Basis of Presentation and Summary of Significant Accounting Policies Basis of Presentation and Summary of Significant Accounting Policies (Tables)

6 Months Ended

Jun. 30, 2013

Schedule Of Assets-held-for Sale [Table Text Block]

A summary of the assets and liabilities held for sale on our condensed consolidated balance sheets as of June 30, 2013 and December 31, 2012 is detailed below.



	June 30, 2013		December 31, 2012
	($ in millions)
Accounts receivable	$	2	$	4
Current assets held for sale	$	2	$	4

Natural gas gathering systems and treating plants, net of accumulated depreciation^(a)	$	205	$	352
Oilfield services equipment, net of accumulated depreciation^(b)	1		27
Other property and equipment, net of accumulated depreciation	305		255
Property and equipment held for sale, net	$	511	$	634

Accounts payable	$	1	$	4
Accrued liabilities	17		17
Current liabilities held for sale	$	18	$	21

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(a)	In the Current Quarter, we sold gas gathering systems classified as held for sale as of December 31, 2012 for proceeds of approximately $245 million and recorded a $106 million gain. See Note 11 for further discussion of this transaction.


(b)	In the Current Period, we sold eight rigs classified as assets held for sale as of December 31, 2012 for proceeds of approximately $27 million.

Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block]

Accumulated Other Comprehensive Income (Loss)

For the Current Period, changes in accumulated other comprehensive income (loss) by component, net of tax, are detailed below.



	Net Gains (Losses) on Cash Flow Hedges			Net Gains (Losses) on Investments			Total
	($ in millions)
Balance, December 31, 2012	$	(189	)	$	7		$	(182	)
Other comprehensive income before reclassifications	—			(5		)	(5		)
Amounts reclassified from accumulated other comprehensive income	11			6			17
Net current period other comprehensive income	11			1			12
Balance, June 30, 2013	$	(178	)	$	8		$	(170	)

A reconciliation of the changes of accumulated other comprehensive income (loss) in the condensed consolidated statements of stockholders’ equity related to our cash flow hedges is presented below.



	Three Months Ended June 30,
	2013						2012
	Before Tax			After Tax			Before Tax			After Tax
	($ in millions)
Balance, beginning of period	$	(287	)	$	(178	)	$	(284	)	$	(176	)
Net change in fair value	2			1			(5		)	(3		)
(Gains) losses reclassified to income	(1		)	(1		)	(17		)	(11		)
Balance, end of period	$	(286	)	$	(178	)	$	(306	)	$	(190	)



	Six Months Ended June 30,
	2013						2012
	Before Tax			After Tax			Before Tax			After Tax
	($ in millions)
Balance, beginning of period	$	(304	)	$	(189	)	$	(287	)	$	(178	)
Net change in fair value	—			—			—			—
(Gains) losses reclassified to income	18			11			(19		)	(12		)
Balance, end of period	$	(286	)	$	(178	)	$	(306	)	$	(190	)

Schedule Of Derivative Instruments, Gain (Loss) In Statement Of Financial Performance

For the Current Quarter and the Current Period, amounts reclassified from accumulated other comprehensive income (loss), net of tax, into the condensed consolidated statement of operations are detailed below.



Details About Accumulated Other Comprehensive Income Components	Affected Line Item in the Statement Where Net Income is Presented	Three Months Ended June 30, 2013			Six Months Ended June 30, 2013
		($ in millions)
Net losses on cash flow hedges:
Commodity contracts	Natural gas, oil and NGL revenues	$	(1	)	$	11
Investments:
Impairment of investment	Impairment of investment	—			6
Total reclassifications for the period, net of tax		$	(1	)	$	17

The following table presents the gain (loss) recognized in the condensed consolidated statements of operations for terminated instruments that were designated as fair value derivatives:



		Three Months Ended June 30,				Six Months Ended June 30,
Fair Value Derivatives	Location of Gain (Loss)	2013		2012		2013		2012
		($ in millions)
Interest rate contracts	Interest expense	$	1	$	2	$	3	$	4