Loans And Allowance For Loan Losses (Narrative) (Details) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Loans And Allowance For Loan Losses [Abstract]
Loans To Principal Holders	$ 0
Principal Holder Ownership Threshold	10.00%
Unfunded Loan Commitments	8,400,000,000
Unused Approved Credit Card Lines of Credit	3,800,000,000
Loans pledged at the Federal Home Loan Bank as collateral for borrowings and letters of credit obtained to secure public deposits	3,600,000,000
Loans pledged at the Federal Reserve Bank as collateral for discount window borrowings	1,400,000,000
Net Investment in Direct Financing and Sales Type Leases	368,800,000	311,600,000
Capital Leases, Net Investment in Sales Type Leases, Deferred Income	25,100,000	23,600,000
Property Subject to or Available for Operating Lease, Net	24,400,000	21,100,000
Restructured loans	83,206,000
Credit quality personal real estate loans excluded	244,300,000	224,500,000
Credit quality consumer loans excluded	47,500,000	87,400,000
Consumer and personal real estate loans excluded from table, as a percentage of Personal Banking portfolio	6.50%	7.60%
Restructured loans on non-accrual status	24,400,000
Accruing Restructured Loans	58,822,000	65,508,000
Restructured loans performing under their modified terms	38,200,000	40,300,000
Aggregate restructured credit card loans held	11,800,000	14,700,000
Restructured Loans due to Bankruptcy	8,800,000	10,400,000
Decrease in interest income resulting from modification to credit card loans	1,300,000
Commitments to lend additional funds to customers with restructured loans	11,200,000
Foreclosed real estate	6,600,000	13,500,000
Personal property acquired in repossession	$ 2,800,000	$ 3,500,000