Fair Value Of Assets And Liabilities (Schedule Of Assets And Liabilities Measured At Fair Value On Recurring Basis) (Details) (USD $) In Thousands	Jun. 30, 2011	Dec. 31, 2010	Jun. 30, 2010	Dec. 31, 2009
Loans held for sale	$ 225,242		$ 240,510
AFS securities	3,032,201		2,291,733
Mortgage servicing rights	186,958	207,319	201,746	302,611
Total other assets	330,032		370,475
Total assets	4,970,813		4,911,252
Trading liabilities	498,915		481,477
Other short-term borrowings and commercial paper	23,645		25,886
Total other liabilities	212,289		215,047
Total liabilities	734,849		722,410
Deferred Compensation Assets [Member]
Total other assets	25,356		25,365
Deferred Compensation Assets [Member] | Level 1 [Member]
Total other assets	25,356		25,365
Deferred Compensation Assets [Member] | Level 2 [Member]
Total other assets
Deferred Compensation Assets [Member] | Level 3 [Member]
Total other assets
Derivatives, Forwards and Futures [Member]
Total other assets	12,200		20,672
Total other liabilities	16,509		8,319
Derivatives, Forwards and Futures [Member] | Level 1 [Member]
Total other assets	12,200		20,672
Total other liabilities	16,509		8,319
Derivatives, Forwards and Futures [Member] | Level 2 [Member]
Total other assets
Total other liabilities
Derivatives, Forwards and Futures [Member] | Level 3 [Member]
Total other assets
Total other liabilities
Derivatives, Interest Rate Contracts [Member]
Total other assets	292,476		324,438
Total other liabilities	194,504		206,728
Derivatives, Interest Rate Contracts [Member] | Level 1 [Member]
Total other assets
Total other liabilities
Derivatives, Interest Rate Contracts [Member] | Level 2 [Member]
Total other assets	292,476		324,438
Total other liabilities	194,504		206,728
Derivatives, Interest Rate Contracts [Member] | Level 3 [Member]
Total other assets
Total other liabilities
Derivatives, Other [Member]
Total other liabilities	1,276
Derivatives, Other [Member] | Level 2 [Member]
Total other liabilities	6
Derivatives, Other [Member] | Level 3 [Member]
Total other liabilities	1,270
Capital Markets [Member]
Trading securities	1,164,757		1,766,584
Capital Markets [Member] | U.S. Treasuries [Member]
Trading securities	218,302		105,796
Capital Markets [Member] | U.S. Treasuries [Member] | Level 1 [Member]
Trading securities
Capital Markets [Member] | U.S. Treasuries [Member] | Level 2 [Member]
Trading securities	218,302		105,796
Capital Markets [Member] | U.S. Treasuries [Member] | Level 3 [Member]
Trading securities
Capital Markets [Member] | Government Agency Issued Mortgage-Backed Securities MBS [Member]
Trading securities	361,421		295,046
Capital Markets [Member] | Government Agency Issued Mortgage-Backed Securities MBS [Member] | Level 1 [Member]
Trading securities
Capital Markets [Member] | Government Agency Issued Mortgage-Backed Securities MBS [Member] | Level 2 [Member]
Trading securities	361,421		295,046
Capital Markets [Member] | Government Agency Issued Mortgage-Backed Securities MBS [Member] | Level 3 [Member]
Trading securities
Capital Markets [Member] | Government Agency Issued Collateralized Mortgage Obligations CMO [Member]
Trading securities	133,841		196,775
Capital Markets [Member] | Government Agency Issued Collateralized Mortgage Obligations CMO [Member] | Level 1 [Member]
Trading securities
Capital Markets [Member] | Government Agency Issued Collateralized Mortgage Obligations CMO [Member] | Level 2 [Member]
Trading securities	133,841		196,775
Capital Markets [Member] | Government Agency Issued Collateralized Mortgage Obligations CMO [Member] | Level 3 [Member]
Trading securities
Capital Markets [Member] | Other U.S. Government Agencies [Member]
Trading securities	192,643		161,993
Capital Markets [Member] | Other U.S. Government Agencies [Member] | Level 1 [Member]
Trading securities
Capital Markets [Member] | Other U.S. Government Agencies [Member] | Level 2 [Member]
Trading securities	192,643		161,993
Capital Markets [Member] | Other U.S. Government Agencies [Member] | Level 3 [Member]
Trading securities
Capital Markets [Member] | States and Municipalities [Member]
Trading securities	19,093		21,708
Capital Markets [Member] | States and Municipalities [Member] | Level 1 [Member]
Trading securities
Capital Markets [Member] | States and Municipalities [Member] | Level 2 [Member]
Trading securities	19,093		21,708
Capital Markets [Member] | States and Municipalities [Member] | Level 3 [Member]
Trading securities
Capital Markets [Member] | Corporate and Other Debt [Member]
Trading securities	239,210		361,202
Capital Markets [Member] | Corporate and Other Debt [Member] | Level 1 [Member]
Trading securities
Capital Markets [Member] | Corporate and Other Debt [Member] | Level 2 [Member]
Trading securities	239,205		361,168
Capital Markets [Member] | Corporate and Other Debt [Member] | Level 3 [Member]
Trading securities	5		34
Capital Markets [Member] | Trading Loans [Member]
Trading securities			621,626
Capital Markets [Member] | Trading Loans [Member] | Level 1 [Member]
Trading securities
Capital Markets [Member] | Trading Loans [Member] | Level 2 [Member]
Trading securities			621,626
Capital Markets [Member] | Trading Loans [Member] | Level 3 [Member]
Trading securities
Capital Markets [Member] | Equity, Mutual Funds, and Other [Member]
Trading securities	247		2,438
Capital Markets [Member] | Equity, Mutual Funds, and Other [Member] | Level 1 [Member]
Trading securities
Capital Markets [Member] | Equity, Mutual Funds, and Other [Member] | Level 2 [Member]
Trading securities	247		2,438
Capital Markets [Member] | Equity, Mutual Funds, and Other [Member] | Level 3 [Member]
Trading securities
Capital Markets [Member] | Level 1 [Member]
Trading securities
Capital Markets [Member] | Level 2 [Member]
Trading securities	1,164,752		1,766,550
Capital Markets [Member] | Level 3 [Member]
Trading securities	5		34
Mortgage Banking [Member]
Trading securities	31,623		40,204
Mortgage Banking [Member] | Principal Only [Member]
Trading securities	8,775		11,340
Mortgage Banking [Member] | Principal Only [Member] | Level 1 [Member]
Trading securities
Mortgage Banking [Member] | Principal Only [Member] | Level 2 [Member]
Trading securities	8,775		11,340
Mortgage Banking [Member] | Principal Only [Member] | Level 3 [Member]
Trading securities
Mortgage Banking [Member] | Interest Only [Member]
Trading securities	22,848		28,864
Mortgage Banking [Member] | Interest Only [Member] | Level 1 [Member]
Trading securities
Mortgage Banking [Member] | Interest Only [Member] | Level 2 [Member]
Trading securities
Mortgage Banking [Member] | Interest Only [Member] | Level 3 [Member]
Trading securities	22,848		28,864
Mortgage Banking [Member] | Level 1 [Member]
Trading securities
Mortgage Banking [Member] | Level 2 [Member]
Trading securities	8,775		11,340
Mortgage Banking [Member] | Level 3 [Member]
Trading securities	22,848		28,864
U.S. Treasuries [Member]
AFS securities	46,250		68,568
Trading liabilities	331,864		224,951
U.S. Treasuries [Member] | Level 1 [Member]
AFS securities
Trading liabilities
U.S. Treasuries [Member] | Level 2 [Member]
AFS securities	46,250		68,568
Trading liabilities	331,864		224,951
U.S. Treasuries [Member] | Level 3 [Member]
AFS securities
Trading liabilities
Government Agency Issued Mortgage-Backed Securities MBS [Member]
AFS securities	1,501,767		915,601
Trading liabilities	238		732
Government Agency Issued Mortgage-Backed Securities MBS [Member] | Level 1 [Member]
AFS securities
Trading liabilities
Government Agency Issued Mortgage-Backed Securities MBS [Member] | Level 2 [Member]
AFS securities	1,501,767		915,601
Trading liabilities	238		732
Government Agency Issued Mortgage-Backed Securities MBS [Member] | Level 3 [Member]
AFS securities
Trading liabilities
Government Agency Issued Collateralized Mortgage Obligations CMO [Member]
AFS securities	1,423,894		1,096,506
Trading liabilities	122
Government Agency Issued Collateralized Mortgage Obligations CMO [Member] | Level 1 [Member]
AFS securities
Trading liabilities
Government Agency Issued Collateralized Mortgage Obligations CMO [Member] | Level 2 [Member]
AFS securities	1,423,894		1,096,506
Trading liabilities	122
Government Agency Issued Collateralized Mortgage Obligations CMO [Member] | Level 3 [Member]
AFS securities
Trading liabilities
Other U.S. Government Agencies [Member]
AFS securities	19,927		107,623
Trading liabilities	6,026		1,010
Other U.S. Government Agencies [Member] | Level 1 [Member]
AFS securities
Trading liabilities
Other U.S. Government Agencies [Member] | Level 2 [Member]
AFS securities	13,246		18,128
Trading liabilities	6,026		1,010
Other U.S. Government Agencies [Member] | Level 3 [Member]
AFS securities	6,681		89,495
Trading liabilities
States and Municipalities [Member]
AFS securities	19,365		41,875
States and Municipalities [Member] | Level 1 [Member]
AFS securities
States and Municipalities [Member] | Level 2 [Member]
AFS securities	17,865		41,875
States and Municipalities [Member] | Level 3 [Member]
AFS securities	1,500
Corporate and Other Debt [Member]
AFS securities	540		546
Trading liabilities	160,665		254,784
Corporate and Other Debt [Member] | Level 1 [Member]
AFS securities	540		546
Trading liabilities
Corporate and Other Debt [Member] | Level 2 [Member]
AFS securities
Trading liabilities	160,665		254,784
Corporate and Other Debt [Member] | Level 3 [Member]
AFS securities
Trading liabilities
Venture Capital [Member]
AFS securities	13,179		16,141
Venture Capital [Member] | Level 1 [Member]
AFS securities
Venture Capital [Member] | Level 2 [Member]
AFS securities
Venture Capital [Member] | Level 3 [Member]
AFS securities	13,179		16,141
Equity, Mutual Funds, and Other [Member]
AFS securities	7,279		44,873
Equity, Mutual Funds, and Other [Member] | Level 1 [Member]
AFS securities	7,279		13,715
Equity, Mutual Funds, and Other [Member] | Level 2 [Member]
AFS securities			31,158
Equity, Mutual Funds, and Other [Member] | Level 3 [Member]
AFS securities
Level 1 [Member]
Loans held for sale
AFS securities	7,819		14,261
Mortgage servicing rights
Total other assets	37,556		46,037
Total assets	45,375		60,298
Trading liabilities
Other short-term borrowings and commercial paper
Total other liabilities	16,509		8,319
Total liabilities	16,509		8,319
Level 2 [Member]
Loans held for sale	9,372		30,762
AFS securities	3,003,022		2,171,836
Mortgage servicing rights
Total other assets	292,476		324,438
Total assets	4,478,397		4,304,926
Trading liabilities	498,915		481,477
Other short-term borrowings and commercial paper
Total other liabilities	194,510		206,728
Total liabilities	693,425		688,205
Level 3 [Member]
Loans held for sale	215,870		209,748
AFS securities	21,360		105,636
Mortgage servicing rights	186,958		201,746
Total other assets
Total assets	447,041		546,028
Trading liabilities
Other short-term borrowings and commercial paper	23,645		25,886
Total other liabilities	1,270
Total liabilities	$ 24,915		$ 25,886