Derivatives (Derivatives Associated With Legacy Mortgage Servicing Activities) (Details) (USD $)					3 Months Ended				9 Months Ended				3 Months Ended				9 Months Ended				3 Months Ended				9 Months Ended				3 Months Ended				9 Months Ended
	Sep. 30, 2011	Dec. 31, 2010	Sep. 30, 2010	Dec. 31, 2009	Sep. 30, 2011 Forwards And Futures [Member] Retained Interests Hedging [Member] Hedging Instruments [Member]		Sep. 30, 2010 Forwards And Futures [Member] Retained Interests Hedging [Member] Hedging Instruments [Member]		Sep. 30, 2011 Forwards And Futures [Member] Retained Interests Hedging [Member] Hedging Instruments [Member]		Sep. 30, 2010 Forwards And Futures [Member] Retained Interests Hedging [Member] Hedging Instruments [Member]		Sep. 30, 2011 Interest Rate Swaps And Swaptions [Member] Retained Interests Hedging [Member] Hedging Instruments [Member]		Sep. 30, 2010 Interest Rate Swaps And Swaptions [Member] Retained Interests Hedging [Member] Hedging Instruments [Member]		Sep. 30, 2011 Interest Rate Swaps And Swaptions [Member] Retained Interests Hedging [Member] Hedging Instruments [Member]		Sep. 30, 2010 Interest Rate Swaps And Swaptions [Member] Retained Interests Hedging [Member] Hedging Instruments [Member]		Sep. 30, 2011 Mortgage Servicing Rights [Member] Retained Interests Hedging [Member] Hedged Items [Member]		Sep. 30, 2010 Mortgage Servicing Rights [Member] Retained Interests Hedging [Member] Hedged Items [Member]		Sep. 30, 2011 Mortgage Servicing Rights [Member] Retained Interests Hedging [Member] Hedged Items [Member]		Sep. 30, 2010 Mortgage Servicing Rights [Member] Retained Interests Hedging [Member] Hedged Items [Member]		Sep. 30, 2011 Other Retained Interests [Member] Retained Interests Hedging [Member] Hedged Items [Member]		Sep. 30, 2010 Other Retained Interests [Member] Retained Interests Hedging [Member] Hedged Items [Member]		Sep. 30, 2011 Other Retained Interests [Member] Retained Interests Hedging [Member] Hedged Items [Member]		Sep. 30, 2010 Other Retained Interests [Member] Retained Interests Hedging [Member] Hedged Items [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Notional													$ 2,543,000,000	[1],[2]	$ 2,669,000,000	[1],[2]	$ 2,543,000,000	[1],[2]	$ 2,669,000,000	[1],[2]
Notional, Forwards and Futures					3,145,000,000	[1],[2]	5,999,000,000	[1],[2]	3,145,000,000	[1],[2]	5,999,000,000	[1],[2]
Assets													9,619,000	[1],[2]	11,177,000	[1],[2]	9,619,000	[1],[2]	11,177,000	[1],[2]
Assets, Forwards and Futures					28,553,000	[1],[2]	5,572,000	[1],[2]	28,553,000	[1],[2]	5,572,000	[1],[2]
Liabilities													29,381,000	[1],[2]	5,416,000	[1],[2]	29,381,000	[1],[2]	5,416,000	[1],[2]
Liabilities, Forwards and Futures					6,286,000	[1],[2]	4,631,000.000	[1],[2]	6,286,000	[1],[2]	4,631,000.000	[1],[2]
Gains/(Losses)													7,881,000	[1],[2]	10,460,000	[1],[2]	30,105,000	[1],[2]	66,881,000	[1],[2]
Gains/(Losses), Forwards and Futures					22,586,000	[1],[2]	17,236,000	[1],[2]	28,934,000	[1],[2]	57,856,000	[1],[2]
Mortgage servicing rights (Note 5)	150,803,000	207,319,000	191,943,000	302,611,000																	147,240,000	[2],[3]	187,969,000	[2],[3]	147,240,000	[2],[3]	187,969,000	[2],[3]
Fair value of retained interests	1,227,197,000	769,750,000	1,214,595,000																										27,754,000	[2],[4]	36,829,000	[2],[4]	27,754,000	[2],[4]	36,829,000	[2],[4]
Unrealized gain (loss) included in earnings reflected in mortgage banking income																					$ (22,452,000)	[2],[3]	$ 3,880,000	[2],[3]	$ (25,776,000)	[2],[3]	$ (41,177,000)	[2],[3]	$ (983,000)	[2],[4]	$ 248,000	[2],[4]	$ 1,658,000	[2],[4]	$ 3,269,000	[2],[4]

[1] Assets included in the Other assets section of the Consolidated Condensed Statements of Condition. Liabilities included in the Other liabilities section of the Consolidated Condensed Statements of Condition.

[2] Gains/losses included in the Mortgage banking income section of the Consolidated Condensed Statements of Income.

[3] Assets included in the Mortgage servicing rights section of the Consolidated Condensed Statements of Condition.

[4] Assets included in the Trading securities section of the Consolidated Condensed Statements of Condition.