CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (USD $) In Millions	Total	Preferred Stock [Member]	Common stock [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]
Balance as of beginning-of-year at Dec. 31, 2009		$ 806	$ 7,840	$ 3,316	$ (262)
Issuance (redemption) of Series B preferred stock		(950)
Accretion of discount on Series B preferred stock		144		(144)
Issuance of common stock			368
Stock compensation/issued for benefit plans			9
Effect of amendment to deferred compensation plans			(29)
Retirement of common stock/cancellation of shares			0
Cumulative effect from adoption of new accounting standards				(169)	181
Comprehensive income (loss)				1,558
Less other comprehensive income (loss), net of tax				1,019
Other comprehensive income (loss), net of tax					1,019
Net income (loss)	539			539
Retirement of common stock				0
Dividends declared: Common (2011 - $0.100; 2010 - $0.020)				(6)
Dividends on preferred stock				(24)
Balance as of end-of-period at Jun. 30, 2010	12,638	0	8,188	3,512	938
Balance as of beginning-of-year at Dec. 31, 2010	12,806	0	8,124	3,934	748
Issuance of Series B preferred stock		0
Accretion of discount on Series B preferred stock		0		0
Issuance of common stock			0
Stock compensation/issued for benefit plans			9
Effect of amendment to deferred compensation plans			0
Retirement of common stock/cancellation of shares			(195)
Cumulative effect from adoption of new accounting standards				0	0
Comprehensive income (loss)				1,029
Less other comprehensive income (loss), net of tax				364
Other comprehensive income (loss), net of tax					364
Net income (loss)	665			665
Retirement of common stock				(31)
Dividends declared: Common (2011 - $0.100; 2010 - $0.020)				(32)
Dividends on preferred stock				0
Balance as of end-of-period at Jun. 30, 2011	$ 13,586	$ 0	$ 7,938	$ 4,536	$ 1,112