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

3 Months Ended

Mar. 31, 2013

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

are also continuing to review our portfolio of other noncore assets, including real estate and other holdings in Oklahoma City (other than our core campus), and we may determine to divest all or a portion of these assets in subsequent periods. A summary of the assets and liabilities held for sale on our condensed consolidated balance sheets as of March 31, 2013 and December 31, 2012 is detailed below.



	March 31, 2013		December 31, 2012
	($ in millions)
Accounts receivable	$	11	$	4
Current assets held for sale	$	11	$	4

Natural gas gathering systems and treating plants, net of accumulated depreciation	$	330	$	352
Oilfield services equipment, net of accumulated depreciation^(a)	—		27
Other property and equipment, net of accumulated depreciation	258		255
Property and equipment held for sale, net	$	588	$	634

Accounts payable	$	—	$	4
Accrued liabilities	20		17
Current liabilities held for sale	$	20	$	21

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(a)	In the Current Quarter, 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 Quarter, 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	(1		)	(5		)	(6		)
Amounts reclassified from accumulated other comprehensive income	12			6			18
Net current period other comprehensive income	11			1			12
Balance, March 31, 2013	$	(178	)	$	8		$	(170	)

AOCI Reclassification into Statement of Operations [Table Text Block]

For the Current Quarter, 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	Amount Reclassified from Accumulated Other Comprehensive Income
		($ in millions)
Net losses on cash flow hedges:
Commodity contracts	Natural gas, oil and NGL revenues	$	12
Investments:
Impairment of investment	Impairment of investment	6
Total reclassifications for the period, net of tax		$	18