Debt and Interest Expense (Tables)

9 Months Ended

Sep. 30, 2012

Table Text Block [Abstract]

Debt Outstanding and Debt Activity Tables

	September 30,		December 31,
millions	2012		2011
Long-term notes and debentures	$	14,821	$	16,452
WES borrowings		1,020		500
Total debt at face value	$	15,841	$	16,952
Net unamortized discounts and premiums (1)		(1,700)		(1,722)
Total borrowings	$	14,141	$	15,230
Less: Current portion of long-term debt		1,039		170
Total long-term debt	$	13,102	$	15,060

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(1)Unamortized discounts and premiums are amortized over the term of the related debt.

		Carrying
millions		Value		Description
Balance at December 31, 2011		$	15,230
	Borrowings		319	WES revolving credit facility
	Repayments		(131)	6.125% Senior Notes due 2012
			(40)	WES revolving credit facility
	Other, net		8	Changes in debt premium or discount
Balance at March 31, 2012		$	15,386
	Issuance		516	WES 4.00% Senior Notes due 2022
	Borrowings		55	WES revolving credit facility
	Repayments		(800)	$5.0 billion Facility
			(334)	WES revolving credit facility
	Other, net		9	Changes in debt premium or discount
Balance at June 30, 2012		$	14,832
	Repayments		(700)	$5.0 billion Facility
	Other, net		9	Changes in debt premium or discount
Balance at September 30, 2012		$	14,141

Interest Expense Table

	Three Months Ended				Nine Months Ended
	September 30,				September 30,
millions	2012		2011		2012		2011
Current debt, long-term debt, and other	$	238	$	245	$	724	$	743
Capitalized interest		(53)		(39)		(163)		(101)
Total interest expense	$	185	$	206	$	561	$	642