Loans (Period-End Balances And Various Asset Quality Attributes By Origination Vintage For Permanent Mortgage Classes Of Loans) (Details) (USD $)	Mar. 31, 2012		Dec. 31, 2011	Mar. 31, 2011
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	$ 15,971,330,000	[1],[2]	$ 16,397,127,000	$ 15,972,372,000	[1],[2]
Permanent Mortgage Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Permanent Mortgage - Period End Balance	789,000,000	[3]		1,088,000,000	[3]
Avg orig FICO	734			727
Avg Refreshed FICO	711			693
Loans, net of unearned income	788,700,000	[4]		1,087,524,000	[4]
Permanent Mortgage Portfolio Segment [Member] | Pre-2004 [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Permanent Mortgage - Period End Balance	153,000,000	[3]		146,000,000	[3]
Avg orig FICO	725			724
Avg Refreshed FICO	733			736
Permanent Mortgage Portfolio Segment [Member] | 2004 [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Permanent Mortgage - Period End Balance	10,000,000	[3]		13,000,000	[3]
Avg orig FICO	722			717
Avg Refreshed FICO	696			701
Permanent Mortgage Portfolio Segment [Member] | 2005 [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Permanent Mortgage - Period End Balance	54,000,000	[3]		64,000,000	[3]
Avg orig FICO	739			737
Avg Refreshed FICO	718			719
Permanent Mortgage Portfolio Segment [Member] | 2006 [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Permanent Mortgage - Period End Balance	75,000,000	[3]		130,000,000	[3]
Avg orig FICO	737			726
Avg Refreshed FICO	708			685
Permanent Mortgage Portfolio Segment [Member] | 2007 [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Permanent Mortgage - Period End Balance	390,000,000	[3]		395,000,000	[3]
Avg orig FICO	734			726
Avg Refreshed FICO	700			678
Permanent Mortgage Portfolio Segment [Member] | 2008 [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Permanent Mortgage - Period End Balance	107,000,000	[3]		340,000,000	[3]
Avg orig FICO	744			728
Avg Refreshed FICO	712			678
Restricted Permanent Mortgage Real Estate Loans And Secured Borrowings [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	38,000,000			49,900,000
Restricted Permanent Mortgage Real Estate Loans And Secured Borrowings [Member] | Permanent Mortgage Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	$ 38,000,000		$ 40,600,000	$ 49,900,000

[1] Balances as of March 31, 2012 and 2011 include $20.1 million and $36.5 million of reserves, respectively, and $467.0 million and $672.4 million of balances in restricted consumer real estate loans and secured borrowings, respectively.

[2] Balances as of March 31, 2012 and 2011 include $5.4 million and $3.3 million of reserves, respectively, and $38.0 million and $49.9 million of balances in restricted permanent mortgage loans and secured borrowings, respectively.

[3] Balances as of March 31, 2012 and 2011 include $38.0 million and $49.9 million of restricted loan and secured borrowing balances.

[4] Includes restricted real estate loans and secured borrowings.