STATEMENT OF CONSOLIDATED COMPREHENSIVE INCOME (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Net income	$ 180	$ 1,002	$ 1,333	$ 3,395
Commodity cash flow hedge activity, net of tax:
Reclassification of (gain) loss on settled derivative instruments	(59)	(4)	(151)	32
Change in fair value of derivative instruments	(41)	275	71	181
Derivative hedge ineffectiveness reclassified into earnings		(9)		(10)
Commodity cash flow hedge activity, net of tax	(100)	262	(80)	203
COMPREHENSIVE INCOME	80	1,264	1,253	3,598
Preferred stock dividends	19	19	57	57
COMPREHENSIVE INCOME ATTRIBUTABLE TO COMMON STOCK	$ 61	$ 1,245	$ 1,196	$ 3,541