Loans (Period-End Balances And Various Asset Quality Attributes By Origination Vintage For The HELOC) (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]
HELOC [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
HELOC - Period End Balance	3,582,000,000	[3]		3,976,000,000	[3]
Avg orig FICO	740			740
Avg Refreshed FICO	729			730
Loans, net of unearned income	467,000,000			672,400,000
HELOC [Member] | Pre-2003 [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
HELOC - Period End Balance	168,000,000	[3]		218,000,000	[3]
Avg orig FICO	722			724
Avg Refreshed FICO	715			720
HELOC [Member] | 2003 [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
HELOC - Period End Balance	259,000,000	[3]		308,000,000	[3]
Avg orig FICO	733			733
Avg Refreshed FICO	724			726
HELOC [Member] | 2004 [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
HELOC - Period End Balance	566,000,000	[3]		662,000,000	[3]
Avg orig FICO	728			728
Avg Refreshed FICO	718			721
HELOC [Member] | 2005 [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
HELOC - Period End Balance	705,000,000	[3]		822,000,000	[3]
Avg orig FICO	734			734
Avg Refreshed FICO	720			720
HELOC [Member] | 2006 [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
HELOC - Period End Balance	524,000,000	[3]		610,000,000	[3]
Avg orig FICO	741			742
Avg Refreshed FICO	724			727
HELOC [Member] | 2007 [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
HELOC - Period End Balance	542,000,000	[3]		614,000,000	[3]
Avg orig FICO	746			746
Avg Refreshed FICO	731			732
HELOC [Member] | 2008 [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
HELOC - Period End Balance	286,000,000	[3]		314,000,000	[3]
Avg orig FICO	755			755
Avg Refreshed FICO	749			751
HELOC [Member] | 2009 [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
HELOC - Period End Balance	170,000,000	[3]		199,000,000	[3]
Avg orig FICO	754			755
Avg Refreshed FICO	751			758
HELOC [Member] | 2010 [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
HELOC - Period End Balance	168,000,000	[3]		199,000,000	[3]
Avg orig FICO	755			757
Avg Refreshed FICO	755			757
HELOC [Member] | 2011 [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
HELOC - Period End Balance	159,000,000	[3]		30,000,000	[3]
Avg orig FICO	760			752
Avg Refreshed FICO	757			752
HELOC [Member] | 2012 [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
HELOC - Period End Balance	$ 35,000,000	[3]
Avg orig FICO	762
Avg Refreshed FICO	758

[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 $467.0 million and $672.4 million of restricted loan and secured borrowing balances.