Loans And Allowance For Loan Losses (Summary Of Loans In The Personal Banking Portfolio Percentage Of Balances Outstanding ) (Details)	3 Months Ended
	Mar. 31, 2012
Real Estate - Personal [Member]
Loans And Allowance For Loan Losses [Line Items]
Percentage of Loan Category	100.00%
Consumer [Member]
Loans And Allowance For Loan Losses [Line Items]
Percentage of Loan Category	100.00%
Revolving Home Equity [Member]
Loans And Allowance For Loan Losses [Line Items]
Percentage of Loan Category	100.00%
Consumer Credit Card [Member]
Loans And Allowance For Loan Losses [Line Items]
Percentage of Loan Category	100.00%
Under 600 [Member] | Real Estate - Personal [Member]
Loans And Allowance For Loan Losses [Line Items]
Percentage of Loan Category	3.30%
Under 600 [Member] | Consumer [Member]
Loans And Allowance For Loan Losses [Line Items]
Percentage of Loan Category	8.50%
Under 600 [Member] | Revolving Home Equity [Member]
Loans And Allowance For Loan Losses [Line Items]
Percentage of Loan Category	2.50%
Under 600 [Member] | Consumer Credit Card [Member]
Loans And Allowance For Loan Losses [Line Items]
Percentage of Loan Category	5.20%
600 - 659 [Member] | Real Estate - Personal [Member]
Loans And Allowance For Loan Losses [Line Items]
Percentage of Loan Category	4.70%
600 - 659 [Member] | Consumer [Member]
Loans And Allowance For Loan Losses [Line Items]
Percentage of Loan Category	11.60%
600 - 659 [Member] | Revolving Home Equity [Member]
Loans And Allowance For Loan Losses [Line Items]
Percentage of Loan Category	5.20%
600 - 659 [Member] | Consumer Credit Card [Member]
Loans And Allowance For Loan Losses [Line Items]
Percentage of Loan Category	12.20%
660 - 719 [Member] | Real Estate - Personal [Member]
Loans And Allowance For Loan Losses [Line Items]
Percentage of Loan Category	11.70%
660 - 719 [Member] | Consumer [Member]
Loans And Allowance For Loan Losses [Line Items]
Percentage of Loan Category	23.80%
660 - 719 [Member] | Revolving Home Equity [Member]
Loans And Allowance For Loan Losses [Line Items]
Percentage of Loan Category	17.80%
660 - 719 [Member] | Consumer Credit Card [Member]
Loans And Allowance For Loan Losses [Line Items]
Percentage of Loan Category	33.00%
720 - 780 [Member] | Real Estate - Personal [Member]
Loans And Allowance For Loan Losses [Line Items]
Percentage of Loan Category	31.10%
720 - 780 [Member] | Consumer [Member]
Loans And Allowance For Loan Losses [Line Items]
Percentage of Loan Category	25.60%
720 - 780 [Member] | Revolving Home Equity [Member]
Loans And Allowance For Loan Losses [Line Items]
Percentage of Loan Category	29.30%
720 - 780 [Member] | Consumer Credit Card [Member]
Loans And Allowance For Loan Losses [Line Items]
Percentage of Loan Category	28.10%
Over 780 [Member] | Real Estate - Personal [Member]
Loans And Allowance For Loan Losses [Line Items]
Percentage of Loan Category	49.20%
Over 780 [Member] | Consumer [Member]
Loans And Allowance For Loan Losses [Line Items]
Percentage of Loan Category	30.50%
Over 780 [Member] | Revolving Home Equity [Member]
Loans And Allowance For Loan Losses [Line Items]
Percentage of Loan Category	45.20%
Over 780 [Member] | Consumer Credit Card [Member]
Loans And Allowance For Loan Losses [Line Items]
Percentage of Loan Category	21.50%