Statement of Consolidated Shareholders' Equity (Unaudited) (USD $) In Millions	Total	Comprehensive Income	Series D Preferred Stock	Common Stock	Paid-In Capital	Retained Earnings	Treasury Stock	Accumulated Other Comprehensive Income (Loss)
Beginning Balance at Dec. 31, 2009	$ 15,779			$ 215	$ 4,634	$ 11,437	$ (217)	$ (290)
Comprehensive income:
Net income	2,343	2,343				2,343
Commodity hedges, net of income tax expense (benefit) of $152 and $121 for 2010 and 2011, respectively	340	340						340
Comprehensive income	2,683	2,683
Dividends:
Preferred	(13)					(13)
Common ($0.45 per share and $0.45 per share for 2010 and 2011, respectively)	(156)					(156)
Mandatory convertible preferred stock issued	1,227		1,227
Common stock issuance	2,258			13	2,075		170
Common stock activity, net	19			1	18
Treasury shares issued, net	6				1		5
Compensation expense	142				142
Ending Balance at Sep. 30, 2010	21,945		1,227	229	6,870	13,611	(42)	50
Beginning Balance at Dec. 31, 2010	24,377		1,227	240	8,864	14,223	(36)	(141)
Comprehensive income:
Net income	3,395	3,395				3,395
Commodity hedges, net of income tax expense (benefit) of $152 and $121 for 2010 and 2011, respectively	203	203						203
Comprehensive income	3,598	3,598
Dividends:
Preferred	(57)					(57)
Common ($0.45 per share and $0.45 per share for 2010 and 2011, respectively)	(173)					(173)
Common stock issuance	29			1	28
Treasury shares issued, net	6				2		4
Compensation expense	125				125
Other	(2)				(2)
Ending Balance at Sep. 30, 2011	$ 27,903		$ 1,227	$ 241	$ 9,017	$ 17,388	$ (32)	$ 62