Condensed Consolidated Statements of Changes in Shareholders' Equity (Unaudited) (USD $) In Thousands	Total	Series A Preferred Stock [Member]	Series B Preferred Stock [Member]	Common Stock	Capital Surplus	Treasury Stock	Accumulated Other Comprehensive Loss	Retained Earnings (Deficit)	Retained Earnings (Deficit) Series A Preferred Stock [Member]	Retained Earnings (Deficit) Series B Preferred Stock [Member]
Beginning Balance at Dec. 31, 2009 (Scenario, Previously Reported)	$ 5,336,002	$ 362,507	$ 1,325,008	$ 7,167	$ 6,731,796	$ (11,465)	$ (156,985)	$ (2,922,026)
Beginning Balance at Dec. 31, 2009	5,328,291	362,507	1,325,008	7,167	6,731,796	(11,465)	(161,234)	(2,925,488)
Beginning Balance, Shares at Dec. 31, 2009 (Scenario, Previously Reported)		363	1,398	716,741		980
Beginning Balance, Shares at Dec. 31, 2009		363	1,398	716,741		980
Cumulative effect of change in accounting principle for consolidation of variable interest entities, net of tax of $3,980	(7,711)						(4,249)	(3,462)
Comprehensive Income:
Net income	189,447							189,447
Noncredit-related impairment recoveries (losses) on debt securities not expected to be sold	23,771						23,771
Unrealized net gains (losses) on available-for-sale and other securities arising during the period, net of reclassification for net realized gains	88,428						88,428
Unrealized gains (losses) on cash flow hedging derivatives	17,141						17,141
Change in accumulated unrealized losses for pension and other postretirement obligations	3,498						3,498
Total comprehensive income (loss)	322,285
Issuance of common stock	2,269			5	2,264
Issuance of common stock, Shares				537
Preferred Series B stock discount accretion	0		12,741					(12,741)
Cash dividends declared:
Common Stock, Cash dividends declared	(21,505)							(21,505)
Preferred Stock, Dividend		(23,110)	(52,427)						(23,110)	(52,427)
Recognition of the fair value of share-based compensation	11,413			3	11,410
Other share based compensation activity	63			5	457			525
Other share based compensation activity, Shares				737
Other	250				(2,203)	2,496		(43)
Other, Shares						97
Ending Balance at Sep. 30, 2010	5,567,403	362,507	1,337,749	7,180	6,743,724	(8,969)	(28,396)	(2,846,392)
Ending Balance, Shares at Sep. 30, 2010		363	1,398	718,015		883
Beginning Balance at Dec. 31, 2010	4,980,542	362,507	0	8,642	7,630,093	(8,771)	(197,496)	(2,814,433)
Beginning Balance, Shares at Dec. 31, 2010		363	0	864,195		876
Comprehensive Income:
Net income	415,755							415,755
Noncredit-related impairment recoveries (losses) on debt securities not expected to be sold	7,201						7,201
Unrealized net gains (losses) on available-for-sale and other securities arising during the period, net of reclassification for net realized gains	85,906						85,906
Unrealized gains (losses) on cash flow hedging derivatives	16,183						16,183
Change in accumulated unrealized losses for pension and other postretirement obligations	7,802						7,802
Total comprehensive income (loss)	532,847
Repurchase of warrants convertible to Common purchase	49,100
Cash dividends declared:
Common Stock, Cash dividends declared	(51,869)							(51,869)
Preferred Stock, Dividend		(23,110)							(23,110)
Recognition of the fair value of share-based compensation	13,986				13,986
Other share based compensation activity	821			10	(552)			279
Other share based compensation activity, Shares				1,010
Other	(1,996)				(337)	(1,390)		(269)
Other, Shares						(254)
Ending Balance at Sep. 30, 2011	$ 5,400,479	$ 362,507	$ 0	$ 8,652	$ 7,594,090	$ (10,161)	$ (80,404)	$ (2,474,205)
Ending Balance, Shares at Sep. 30, 2011		363	0	865,205		1,130