STATEMENT OF CONSOLIDATED SHAREHOLDERS' EQUITY (USD $) In Millions, unless otherwise specified	Total	Series D Preferred Stock [Member]	Common Stock [Member]	Paid-in Capital [Member]	Retained Earnings [Member]	Treasury Stock [Member]	Accumulated Other Comprehensive (Loss) [Member]
Balance at Dec. 31, 2009	$ 15,779		$ 215	$ 4,634	$ 11,437	$ (217)	$ (290)
NET INCOME	3,032				3,032
Postretirement, net of income tax benefit (expense)of $2, 7 and 5 for 2010, 2011 and 2012 respectively	(2)						(2)
Commodity hedges, net of tax benefit (expense) of $62, 66 and 35 for 2010, 2011 and 2012 respectively	151						151
Dividends:
Preferred	(32)				(32)
Common ($0.60,$0.60 and $0.68 per share for 2010, 2011 and 2012 respectively)	(214)				(214)
Mandatory convertible preferred stock issued	1,227	1,227
Common shares issued	4,163		24	3,969		170
Common stock activity, net	27		1	26
Treasury stock activity, net	12			1		11
Compensation expense	225			225
Other	9			9
Balance at Dec. 31, 2010	24,377	1,227	240	8,864	14,223	(36)	(141)
NET INCOME	4,584				4,584
Postretirement, net of income tax benefit (expense)of $2, 7 and 5 for 2010, 2011 and 2012 respectively	(1)						(1)
Commodity hedges, net of tax benefit (expense) of $62, 66 and 35 for 2010, 2011 and 2012 respectively	133						133
Dividends:
Preferred	(76)				(76)
Common ($0.60,$0.60 and $0.68 per share for 2010, 2011 and 2012 respectively)	(231)				(231)
Common stock activity, net	36		1	35
Treasury stock activity, net	6			2		4
Compensation expense	167			167
Other	(2)			(2)
Balance at Dec. 31, 2011	28,993	1,227	241	9,066	18,500	(32)	(9)
NET INCOME	2,001				2,001
Postretirement, net of income tax benefit (expense)of $2, 7 and 5 for 2010, 2011 and 2012 respectively	(2)						(2)
Commodity hedges, net of tax benefit (expense) of $62, 66 and 35 for 2010, 2011 and 2012 respectively	(120)						(120)
Dividends:
Preferred	(76)				(76)
Common ($0.60,$0.60 and $0.68 per share for 2010, 2011 and 2012 respectively)	(264)				(264)
Common shares issued	601		3	598
Common stock activity, net	(43)		1	(44)
Treasury stock activity, net	3			1		2
Compensation expense	238			238
Balance at Dec. 31, 2012	$ 31,331	$ 1,227	$ 245	$ 9,859	$ 20,161	$ (30)	$ (131)