Fair Value Of Assets And Liabilities (Schedule Of Unobservable Inputs Utilized In Determining The Fair Value Of Level 3 Recurring And Non-Recurring Measurements) (Details) (USD $)	3 Months Ended
	Mar. 31, 2015		Mar. 31, 2014		Dec. 31, 2014
Fair Value Inputs Assets Quantitative Information [Line Items]
Fair value of retained interests	1,532,463,000		1,194,749,000		$ 1,194,391,000
Loans held-for-sale	26,700,000		229,219,000
Other Liabilities, Fair Value Disclosure	133,273,000		137,863,000
Real estate acquired by foreclosure	39,776,000	[1]	66,035,000		39,922,000
Other assets	176,935,000		194,487,000
Mortgage Banking
Fair Value Inputs Assets Quantitative Information [Line Items]
Fair value of retained interests	5,321,000		6,588,000
First Mortgages
Fair Value Inputs Assets Quantitative Information [Line Items]
Loans held-for-sale	858,000		9,191,000
Residential Real Estate
Fair Value Inputs Assets Quantitative Information [Line Items]
Real estate acquired by foreclosure	17,500,000
Non Recurring
Fair Value Inputs Assets Quantitative Information [Line Items]
Real estate acquired by foreclosure	29,681,000	[2]	42,970,000	[2]
Other assets	28,265,000	[3]	30,445,000	[3]
Derivatives, Other
Fair Value Inputs Assets Quantitative Information [Line Items]
Other Liabilities, Fair Value Disclosure	5,005,000		4,945,000
Other assets	267,000
Level 3
Fair Value Inputs Assets Quantitative Information [Line Items]
Loans held-for-sale	26,700,000		229,219,000
Other Liabilities, Fair Value Disclosure	5,005,000		4,945,000
Other assets	2,342,000		4,687,000
Level 3 | Mortgage Banking
Fair Value Inputs Assets Quantitative Information [Line Items]
Fair value of retained interests	5,321,000	[4]	6,588,000
Level 3 | First Mortgages
Fair Value Inputs Assets Quantitative Information [Line Items]
Loans held-for-sale	858,000		9,191,000
Level 3 | Residential Real Estate
Fair Value Inputs Assets Quantitative Information [Line Items]
Loans held-for-sale	27,558,000		238,410,000
Level 3 | Non Recurring
Fair Value Inputs Assets Quantitative Information [Line Items]
Loans, net of unearned income	40,386,000	[5]	57,035,000	[5]
Real estate acquired by foreclosure	29,681,000	[2]	42,970,000	[2]
Other assets	28,265,000	[3]	30,445,000	[3]
Level 3 | Derivatives, Other
Fair Value Inputs Assets Quantitative Information [Line Items]
Other Liabilities, Fair Value Disclosure	5,005,000		4,945,000
Other assets	0
Other Assets | Level 3 | Non Recurring
Fair Value Inputs Assets Quantitative Information [Line Items]
Other assets	28,265,000	[6]	30,445,000	[6]
Discounted Cash Flow | Trading Securities | Level 3 | Mortgage Banking
Fair Value Inputs Assets Quantitative Information [Line Items]
Valuation Techniques	Discounted cash flow		Discounted cash flow
Discounted Cash Flow | Loans Held-For-Sale | Level 3 | Residential Real Estate
Fair Value Inputs Assets Quantitative Information [Line Items]
Valuation Techniques	Discounted cash flow		Discounted cash flow
Discounted Cash Flow | Derivative Liabilities, Other | Level 3
Fair Value Inputs Assets Quantitative Information [Line Items]
Valuation Techniques	Discounted cash flow		Discounted cash flow
Discounted Cash Flow | Other Assets | Level 3
Fair Value Inputs Assets Quantitative Information [Line Items]
Valuation Techniques	Discounted cash flow		Discounted cash flow
Appraisals From Comparable Properties | Loans, Net Of Unearned Income | Level 3
Fair Value Inputs Assets Quantitative Information [Line Items]
Valuation Techniques	Appraisals from comparable properties		Appraisals from comparable properties
Appraisals From Comparable Properties | Real Estate Acquired By Foreclosure | Level 3
Fair Value Inputs Assets Quantitative Information [Line Items]
Valuation Techniques	Appraisals from comparable properties		Appraisals from comparable properties
Appraisals From Comparable Properties | Other Assets | Level 3
Fair Value Inputs Assets Quantitative Information [Line Items]
Valuation Techniques	Appraisals from comparable properties		Appraisals from comparable properties
Other Collateral Valuations | Loans, Net Of Unearned Income | Level 3
Fair Value Inputs Assets Quantitative Information [Line Items]
Valuation Techniques	Other collateral valuations		Other collateral valuations
Maximum | Discounted Cash Flow | Derivative Liabilities, Other | Level 3
Fair Value Inputs Assets Quantitative Information [Line Items]
Visa covered litigation resolution amount	5,600,000,000		5,200,000,000
Maximum | Discounted Cash Flow | 2% - 22% Values Utilized | Loans Held-For-Sale | Level 3 | Residential Real Estate | First Mortgages
Fair Value Inputs Assets Quantitative Information [Line Items]
Prepayment Speeds	22.00%
Maximum | Discounted Cash Flow | 2% - 4% Values Utilized | Loans Held-For-Sale | Level 3 | Residential Real Estate
Fair Value Inputs Assets Quantitative Information [Line Items]
Credit spreads			4.00%
Maximum | Discounted Cash Flow | 15.0% - 25.0% Added To Credit Spread | Loans Held-For-Sale | Level 3 | Residential Real Estate
Fair Value Inputs Assets Quantitative Information [Line Items]
Delinquency adjustment factor			25.00%
Maximum | Discounted Cash Flow | 0% - 15% Adjustment To Yield | Other Assets | Level 3
Fair Value Inputs Assets Quantitative Information [Line Items]
Adjustments to current sales yields for specific properties	15.00%		15.00%
Maximum | Discounted Cash Flow | 12 Months To 48 Months | Derivative Liabilities, Other | Level 3
Fair Value Inputs Assets Quantitative Information [Line Items]
Time until resolution			48 months
Maximum | Discounted Cash Flow | 10% - 30% Values Utilized | Derivative Liabilities, Other | Level 3
Fair Value Inputs Assets Quantitative Information [Line Items]
Probability of resolution scenarios			30.00%
Maximum | Discounted Cash Flow | 47- 49% Values Utilized | Trading Securities | Level 3 | Mortgage Banking
Fair Value Inputs Assets Quantitative Information [Line Items]
Discount rate			49.00%
Maximum | Discounted Cash Flow | 3% - 12% Values Utilized | Loans Held-For-Sale | Level 3 | Residential Real Estate | Home Equity
Fair Value Inputs Assets Quantitative Information [Line Items]
Prepayment Speeds			12.00%
Maximum | Discounted Cash Flow | 35% - 100% of UPB | Loans Held-For-Sale | Level 3 | Residential Real Estate | Home Equity
Fair Value Inputs Assets Quantitative Information [Line Items]
Loss severity trends			100.00%
Maximum | Discounted Cash Flow | 2% - 11% | Loans Held-For-Sale | Level 3 | Residential Real Estate | Home Equity
Fair Value Inputs Assets Quantitative Information [Line Items]
Draw rate			11.00%
Maximum | Discounted Cash Flow | 5% - 15% Values Utilized | Loans Held-For-Sale | Level 3 | Residential Real Estate | Home Equity
Fair Value Inputs Assets Quantitative Information [Line Items]
Prepayment Speeds	15.00%
Maximum | Discounted Cash Flow | 45% - 100% Of UPB | Loans Held-For-Sale | Level 3 | Residential Real Estate | Home Equity
Fair Value Inputs Assets Quantitative Information [Line Items]
Loss severity trends	100.00%
Maximum | Discounted Cash Flow | 10% - 25% Values Utilized | Derivative Liabilities, Other | Level 3
Fair Value Inputs Assets Quantitative Information [Line Items]
Probability of resolution scenarios	25.00%
Maximum | Discounted Cash Flow | 6% - 55% Values Utilized | Trading Securities | Level 3 | Mortgage Banking
Fair Value Inputs Assets Quantitative Information [Line Items]
Discount rate	55.00%
Maximum | Discounted Cash Flow | 6 Months to 48 Months | Derivative Liabilities, Other | Level 3
Fair Value Inputs Assets Quantitative Information [Line Items]
Time until resolution	48 months
Maximum | Discounted Cash Flow | 5% - 12% Value Utilized | Loans Held-For-Sale | Level 3 | Residential Real Estate | Home Equity
Fair Value Inputs Assets Quantitative Information [Line Items]
Draw rate	12.00%
Maximum | Discounted Cash Flow | 42% - 46% Values Utilized | Trading Securities | Level 3 | Mortgage Banking
Fair Value Inputs Assets Quantitative Information [Line Items]
Prepayment Speeds	46.00%
Maximum | Discounted Cash Flow | 40 - 46% Values Utilized | Trading Securities | Level 3 | Mortgage Banking
Fair Value Inputs Assets Quantitative Information [Line Items]
Prepayment Speeds			46.00%
Maximum | Discounted Cash Flow | 50 - 60 % Values Utilized | Loans Held-For-Sale | Level 3 | Residential Real Estate
Fair Value Inputs Assets Quantitative Information [Line Items]
Foreclosure Losses	60.00%
Maximum | Discounted Cash Flow | 50 - 60 % Values Utilized | Loans Held-For-Sale | Level 3 | Residential Real Estate | First Mortgages
Fair Value Inputs Assets Quantitative Information [Line Items]
Loss severity trends			60.00%
Maximum | Discounted Cash Flow | 10 - 70 % of UPB | Loans Held-For-Sale | Level 3 | Residential Real Estate | First Mortgages
Fair Value Inputs Assets Quantitative Information [Line Items]
Loss severity trends	70.00%
Maximum | Discounted Cash Flow | 6 - 10 % Values Utilized | Loans Held-For-Sale | Level 3 | Residential Real Estate | First Mortgages
Fair Value Inputs Assets Quantitative Information [Line Items]
Prepayment Speeds			10.00%
Maximum | Appraisals From Comparable Properties | 0% - 10% Of Appraisal | Loans, Net Of Unearned Income | Level 3
Fair Value Inputs Assets Quantitative Information [Line Items]
Marketability adjustments for specific properties	10.00%		10.00%
Maximum | Appraisals From Comparable Properties | 0% - 10% Of Appraisal | Real Estate Acquired By Foreclosure | Level 3
Fair Value Inputs Assets Quantitative Information [Line Items]
Adjustment for value changes since appraisal	10.00%		10.00%
Maximum | Appraisals From Comparable Properties | 0% - 25% Of Appraisal | Other Assets | Level 3
Fair Value Inputs Assets Quantitative Information [Line Items]
Marketability adjustments for specific properties	25.00%		25.00%
Maximum | Other Collateral Valuations | 20% - 50% Of Gross Value | Loans, Net Of Unearned Income | Level 3
Fair Value Inputs Assets Quantitative Information [Line Items]
Borrowing base certificates adjustment	50.00%		50.00%
Maximum | Other Collateral Valuations | 0% - 25% Of Reported Value | Loans, Net Of Unearned Income | Level 3
Fair Value Inputs Assets Quantitative Information [Line Items]
Financial statements/auction values adjustment	25.00%		25.00%
Minimum | Discounted Cash Flow | Derivative Liabilities, Other | Level 3
Fair Value Inputs Assets Quantitative Information [Line Items]
Visa covered litigation resolution amount	4,500,000,000		4,400,000,000
Minimum | Discounted Cash Flow | 2% - 22% Values Utilized | Loans Held-For-Sale | Level 3 | Residential Real Estate | First Mortgages
Fair Value Inputs Assets Quantitative Information [Line Items]
Prepayment Speeds	2.00%
Minimum | Discounted Cash Flow | 2% - 4% Values Utilized | Loans Held-For-Sale | Level 3 | Residential Real Estate
Fair Value Inputs Assets Quantitative Information [Line Items]
Credit spreads			2.00%
Minimum | Discounted Cash Flow | 15.0% - 25.0% Added To Credit Spread | Loans Held-For-Sale | Level 3 | Residential Real Estate
Fair Value Inputs Assets Quantitative Information [Line Items]
Delinquency adjustment factor			15.00%
Minimum | Discounted Cash Flow | 0% - 15% Adjustment To Yield | Other Assets | Level 3
Fair Value Inputs Assets Quantitative Information [Line Items]
Adjustments to current sales yields for specific properties	0.00%		0.00%
Minimum | Discounted Cash Flow | 12 Months To 48 Months | Derivative Liabilities, Other | Level 3
Fair Value Inputs Assets Quantitative Information [Line Items]
Time until resolution			12 months
Minimum | Discounted Cash Flow | 10% - 30% Values Utilized | Derivative Liabilities, Other | Level 3
Fair Value Inputs Assets Quantitative Information [Line Items]
Probability of resolution scenarios			10.00%
Minimum | Discounted Cash Flow | 47- 49% Values Utilized | Trading Securities | Level 3 | Mortgage Banking
Fair Value Inputs Assets Quantitative Information [Line Items]
Discount rate			47.00%
Minimum | Discounted Cash Flow | 3% - 12% Values Utilized | Loans Held-For-Sale | Level 3 | Residential Real Estate | Home Equity
Fair Value Inputs Assets Quantitative Information [Line Items]
Prepayment Speeds			3.00%
Minimum | Discounted Cash Flow | 35% - 100% of UPB | Loans Held-For-Sale | Level 3 | Residential Real Estate | Home Equity
Fair Value Inputs Assets Quantitative Information [Line Items]
Loss severity trends			35.00%
Minimum | Discounted Cash Flow | 2% - 11% | Loans Held-For-Sale | Level 3 | Residential Real Estate | Home Equity
Fair Value Inputs Assets Quantitative Information [Line Items]
Draw rate			2.00%
Minimum | Discounted Cash Flow | 5% - 15% Values Utilized | Loans Held-For-Sale | Level 3 | Residential Real Estate | Home Equity
Fair Value Inputs Assets Quantitative Information [Line Items]
Prepayment Speeds	5.00%
Minimum | Discounted Cash Flow | 45% - 100% Of UPB | Loans Held-For-Sale | Level 3 | Residential Real Estate | Home Equity
Fair Value Inputs Assets Quantitative Information [Line Items]
Loss severity trends	45.00%
Minimum | Discounted Cash Flow | 10% - 25% Values Utilized | Derivative Liabilities, Other | Level 3
Fair Value Inputs Assets Quantitative Information [Line Items]
Probability of resolution scenarios	10.00%
Minimum | Discounted Cash Flow | 6% - 55% Values Utilized | Trading Securities | Level 3 | Mortgage Banking
Fair Value Inputs Assets Quantitative Information [Line Items]
Discount rate	6.00%
Minimum | Discounted Cash Flow | 6 Months to 48 Months | Derivative Liabilities, Other | Level 3
Fair Value Inputs Assets Quantitative Information [Line Items]
Time until resolution	6 months
Minimum | Discounted Cash Flow | 5% - 12% Value Utilized | Loans Held-For-Sale | Level 3 | Residential Real Estate | Home Equity
Fair Value Inputs Assets Quantitative Information [Line Items]
Draw rate	5.00%
Minimum | Discounted Cash Flow | 42% - 46% Values Utilized | Trading Securities | Level 3 | Mortgage Banking
Fair Value Inputs Assets Quantitative Information [Line Items]
Prepayment Speeds	42.00%
Minimum | Discounted Cash Flow | 40 - 46% Values Utilized | Trading Securities | Level 3 | Mortgage Banking
Fair Value Inputs Assets Quantitative Information [Line Items]
Prepayment Speeds			40.00%
Minimum | Discounted Cash Flow | 50 - 60 % Values Utilized | Loans Held-For-Sale | Level 3 | Residential Real Estate
Fair Value Inputs Assets Quantitative Information [Line Items]
Foreclosure Losses	50.00%
Minimum | Discounted Cash Flow | 50 - 60 % Values Utilized | Loans Held-For-Sale | Level 3 | Residential Real Estate | First Mortgages
Fair Value Inputs Assets Quantitative Information [Line Items]
Loss severity trends			50.00%
Minimum | Discounted Cash Flow | 10 - 70 % of UPB | Loans Held-For-Sale | Level 3 | Residential Real Estate | First Mortgages
Fair Value Inputs Assets Quantitative Information [Line Items]
Loss severity trends	10.00%
Minimum | Discounted Cash Flow | 6 - 10 % Values Utilized | Loans Held-For-Sale | Level 3 | Residential Real Estate | First Mortgages
Fair Value Inputs Assets Quantitative Information [Line Items]
Prepayment Speeds			6.00%
Minimum | Appraisals From Comparable Properties | 0% - 10% Of Appraisal | Loans, Net Of Unearned Income | Level 3
Fair Value Inputs Assets Quantitative Information [Line Items]
Marketability adjustments for specific properties	0.00%		0.00%
Minimum | Appraisals From Comparable Properties | 0% - 10% Of Appraisal | Real Estate Acquired By Foreclosure | Level 3
Fair Value Inputs Assets Quantitative Information [Line Items]
Adjustment for value changes since appraisal	0.00%		0.00%
Minimum | Appraisals From Comparable Properties | 0% - 25% Of Appraisal | Other Assets | Level 3
Fair Value Inputs Assets Quantitative Information [Line Items]
Marketability adjustments for specific properties	0.00%		0.00%
Minimum | Other Collateral Valuations | 20% - 50% Of Gross Value | Loans, Net Of Unearned Income | Level 3
Fair Value Inputs Assets Quantitative Information [Line Items]
Borrowing base certificates adjustment	20.00%		20.00%
Minimum | Other Collateral Valuations | 0% - 25% Of Reported Value | Loans, Net Of Unearned Income | Level 3
Fair Value Inputs Assets Quantitative Information [Line Items]
Financial statements/auction values adjustment	0.00%		0.00%

[1] (c) March 31, 2015 includes $17.5 million of foreclosed residential real estate properties.

[2] Represents the fair value and related losses of foreclosed properties that were measured subsequent to their initial classification as foreclosed assets. Balance excludes foreclosed real estate related to government insured mortgages.

[3] Represents tax credit investments accounted for under the equity method.

[4] The unobservable inputs for principal-only and interest-only trading securities and subordinated bonds are discussed in the Trading securities-mortgage paragraph.

[5] Represents carrying value of loans for which adjustments are required to be based on the appraised value of the collateral. Write-downs on these loans are recognized as part of provision.

[6] Represents tax credit investments accounted for under the equity method.