Debt and Interest Expense (Tables)

9 Months Ended

Sep. 30, 2011

Table Text Block [Abstract]

Debt Outstanding Table

	September 30, 2011						December 31, 2010
			Carrying		Fair				Carrying		Fair
millions	Principal		Value		Value		Principal		Value		Value
Long-term notes and debentures	$	13,952	$	12,226	$	13,752	$	14,237	$	12,488	$	13,459
WES borrowings		500		494		503		299		299		299
Total borrowings	$	14,452	$	12,720	$	14,255	$	14,536	$	12,787	$	13,758
Capital lease obligations		229		229		N/A		226		226		N/A
Less: Current portion of long-term debt		141		141		134		289		291		296
Total long-term debt	$	14,540	$	12,808	$	14,121	$	14,473	$	12,722	$	13,462

Debt Activity Table

				Carrying
millions		Principal		Value		Description
Balance at December 31, 2010		$	14,536	$	12,787
	Borrowings		560		560	WES credit facility
	Repayments(1)		(389)		(389)	WES credit facility and WES term loan
	Other, net		—		8	Changes in debt premium or discount
Balance at March 31, 2011		$	14,707	$	12,966
	Issuance		500		494	WES 5.375% Senior Notes due 2021
	Repayments(1)		(470)		(470)	WES credit facility
	Other, net		—		8	Changes in debt premium or discount
Balance at June 30, 2011		$	14,737	$	12,998
	Borrowings		10		10	WES credit facility
	Repayments(1)		(285)		(285)	6.875% Senior Notes due 2011
			(10)		(10)	WES credit facility
	Other, net		—		7	Changes in debt premium or discount
Balance at September 30, 2011		$	14,452	$	12,720

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(1)Debt repayment activity includes both scheduled repayments and retirements before scheduled maturity.

Interest Expense Table

		Three Months Ended				Nine Months Ended
		September 30,				September 30,
millions		2011		2010		2011		2010
Current debt, long-term debt, and other(1)		$	245	$	235	$	743	$	642
Loss on early debt retirements and commitment
	termination(2)		—		17		—		89
Capitalized interest			(39)		(34)		(101)		(89)
Interest expense		$	206	$	218	$	642	$	642

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(1)Included in the three and ninemonths ended September 30, 2010, is $7 million and $9 million, respectively, of unamortized debt issuance costs associated with the retirement of the midstream subsidiary note payable to a related party (Midstream Subsidiary Note).

(2)Loss on early debt retirements in 2010 is the result of repurchasing $1.0 billion aggregate principal amount of debt due 2011 and 2012. Also included in the three and ninemonths ended September 30, 2010, is $17 million for commitment and structuring costs associated with a contemplated term-loan facility.