Consolidated Statement of Changes in Shareholders' Equity (Unaudited) (USD $) In Thousands	Total	Preferred stock	Common stock	Common stock issuable	Additional paid-in capital	Retained earnings	Accumulated other comprehensive income (loss), net	Treasury stock
Beginning Balance at Dec. 31, 2009	$ 7,752,907	$ 730,235	$ 60,198	$ 4,342	$ 2,442,947	$ 5,076,884	$ (335,997)	$ (225,702)
Comprehensive income:
Net income	339,704					339,704
Other comprehensive income, net of tax and reclassification adjustments:
Unrealized (gain) losses on investment securities	136,766						136,766
Defined benefit plans liability adjustment	2,175						2,175
Unrealized gain on terminated cash flow hedge	(141)						(141)
Other comprehensive income	478,504
Preferred stock cash dividends	(20,113)					(20,113)
Amortization of preferred stock discount		5,115				(5,115)
Repayment of management stock ownership program receivable	1,838				1,838
Stock-based compensation plans:
Compensation expense, net	27,315				(13,571)			40,886
Exercises of stock options, net	27,403				(21,997)			49,400
Directors' stock plan	555				(232)			787
Deferred compensation plans, net, including dividend equivalents	(49)			(265)	(292)	(96)		604
Other	914				914
Common stock cash dividends - $1.40 per share for both 2010 and 2011	(167,430)					(167,430)
Ending Balance at Jun. 30, 2010	8,101,844	735,350	60,198	4,077	2,409,607	5,223,834	(197,197)	(134,025)
Beginning Balance at Dec. 31, 2010	8,357,695	740,657	60,198	4,189	2,398,615	5,426,701	(205,220)	(67,445)
Comprehensive income:
Net income	528,631					528,631
Other comprehensive income, net of tax and reclassification adjustments:
Unrealized (gain) losses on investment securities	(27,892)						(27,892)
Defined benefit plans liability adjustment	4,288						4,288
Unrealized gain on terminated cash flow hedge	(141)						(141)
Foreign currency translation adjustment	196						196
Other comprehensive income	505,082
Acquisition of Wilmington Trust Corporation - common stock issued	405,557		2,348		403,209
Partial redemption of Series A preferred stock	(370,000)	(370,000)
Conversion of Series B preferred stock into 433,144 shares of common stock		(26,500)	192		21,754			4,554
Issuance of Series D preferred stock	495,000	500,000			(5,000)
Preferred stock cash dividends	(20,046)					(20,046)
Amortization of preferred stock discount		16,744				(16,744)
Stock-based compensation plans:
Compensation expense, net	21,311		27		(10,382)			31,666
Exercises of stock options, net	21,170		12		(8,948)			30,106
Directors' stock plan	563				(49)			612
Deferred compensation plans, net, including dividend equivalents	35			(159)	(219)	(94)		507
Other	1,022				1,022
Common stock cash dividends - $1.40 per share for both 2010 and 2011	(173,195)					(173,195)
Ending Balance at Jun. 30, 2011	$ 9,244,194	$ 860,901	$ 62,777	$ 4,030	$ 2,800,002	$ 5,745,253	$ (228,769)	$ 0