Contingencies And Other Disclosures (Narrative) (Details) (USD $)	1 Months Ended		3 Months Ended					9 Months Ended		48 Months Ended	96 Months Ended					3 Months Ended				1 Months Ended	12 Months Ended			3 Months Ended			9 Months Ended
	Sep. 30, 2011		Sep. 30, 2011		Jun. 30, 2011	Sep. 30, 2010		Sep. 30, 2011		Dec. 31, 2008	Dec. 31, 2007	Sep. 26, 2011	Mar. 31, 2011	Dec. 31, 2010	Sep. 26, 2011 Two Credit Unions [Member] HELOC [Member]	Mar. 31, 2011 Maximum [Member] Visa Interest [Member]	Mar. 31, 2011 Minimum [Member] Visa Interest [Member]	Sep. 30, 2011 Alt-A [Member]	Sep. 30, 2011 Jumbo [Member]	Jul. 31, 2011 Sentinel Management Group, Inc. [Member]	Dec. 31, 2010 Visa Class B Shares [Member]	Sep. 30, 2011 Visa Class B Shares [Member]	Mar. 31, 2008 Visa Class B Shares [Member]	Jun. 30, 2011 Visa Interest [Member]	Sep. 30, 2011 Visa Interest [Member]	Dec. 31, 2010 Visa Interest [Member]	Sep. 30, 2011 Proprietary Securitization [Member]	Sep. 30, 2011 Single Family Residential Loans [Member]	Sep. 30, 2010 Single Family Residential Loans [Member]	Sep. 30, 2011 Mortgage Loans Serviced For Government Sponsored Enterprises [Member]	Sep. 26, 2011 HELOC [Member]	Sep. 30, 2011 M&T Arbitration Claim [Member]	Sep. 30, 2011 Active Securitizations [Member]	Sep. 26, 2011 Federal Housing Finance Agency [Member]
Loss Contingencies [Line Items]
Unpaid principal balance of servicing portfolio	$ 25,000,000,000		$ 25,000,000,000					$ 25,000,000,000																						$ 9,100,000,000
Original balance of HELOCs sold in branch sales subject to repurchase claims																																45,500,000
Loans, net of unearned income	16,241,402,000	[1],[2]	16,241,402,000	[1],[2]		17,059,489,000	[1],[2]	16,241,402,000	[1],[2]					16,782,572,000																		24,500,000
Charged-off loans																																10,000,000
Number of Visa Class B shares received in connection with initial public offering																							2,400,000
Value Of Shares Held In Visa Class B Shares																						1,100,000
Number of proprietary securitization trusts in which HELOCs were transferred								6
Amount trustee would receive under terms of the settlement																				38,500,000
Settlement expense																				36,700,000
Actual damages sought by plaintiff								5,000,000
Historical Cost																						0
Estimated conversion ratio								49.00%
Derivative liability related to sale of Visa shares	1,200,000		1,200,000					1,200,000																	2,500,000	1,000,000
Additional amount deposited into escrow account													400,000,000
Reduction in contingent liability																3,300,000
Contingent liability																	1,400,000
Payment to the counterparty																								700,000
First lien mortgage loan portfolio with an unpaid principal balance	656,036,000		656,036,000			794,737,000		656,036,000
Recognized servicing and P&I advances	317,100,000		317,100,000			239,900,000		317,100,000
Loans originated and sold										69,500,000,000
Loans securitized, without recourse in proprietary transactions											47,000,000,000
Loans securitized related to active securitization trusts	36,700,000,000		36,700,000,000					36,700,000,000
Number of active securitization trusts																											110
Number of securitization trusts inactive																											30
Loans sold on full recourse basis with servicing retained																												44,900,000	60,700,000
Number of securitization trusts																											140
Remaining balance in mortgage loans	12,700,000,000		12,700,000,000					12,700,000,000										7,500,000,000	5,200,000,000
Stated percentage of voting rights								25.00%
Total remaining certificate balance with monoline insurance	128,400,000		128,400,000					128,400,000				98,000,000																					103,400,000
Original combined certificate balances of investments subject to subpoena															299,800,000																321,600,000
Current combined certificate balances of investments subject to subpoena															123,700,000																159,100,000
Number of trusts in which home equity lines and loans were securitized								7
Investment in proprietary securitizations subject to litigation								1,100,000,000
Number of lawsuits												4
Ending certificate balance of the investments subject to lawsuits												528,800,000																						377,500,000
Cumulative original note balances of the HELOC proprietary securitizations												2,500,000,000
Original note balances of the closed-end second lien securitization	236,300,000		236,300,000					236,300,000
Current note balances of the closed-end second lien securitization	25,000,000		25,000,000					25,000,000
Current note balances of the HELOC proprietary securitizations												600,000,000
Percentage of repurchase make-whole claims related to private whole loan sales								2.00%
Loan-to-value ratio at origination								80.00%
Unpaid principal balance of loans sold where private mortgage insurance had been cancelled					208,900,000	87,200,000		271,900,000
Unpaid Principal Balance After Partial Charge Offs And Locom			126,000,000					126,000,000
Liability for estimated repurchase losses	$ 171,400,000		$ 171,400,000			$ 177,600,000		$ 171,400,000
Number of Class B Shares Sold	895,000																				440,000

[1] Q3 2011 and Q3 2010 include $26.9 million and $41.9 million of reserves, respectively, and $623.3 million and $735.8 million of balances in restricted consumer real estate loans, respectively.

[2] Q3 2011 and Q3 2010 include $5.5 million and $5.9 million of reserves, respectively, and $42.4 million and $60.7 million of balances in restricted permanent mortgage loans, respectively.