Loans (Accruing And Non-Accruing Loans By Class) (Details) (USD $)	Sep. 30, 2012		Dec. 31, 2011	Sep. 30, 2011
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	$ 16,523,783,000	[1],[2]	$ 16,397,127,000	$ 16,241,402,000	[1],[2]
Commercial Financial And Industrial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	8,466,450,000			7,705,749,000
Commercial Financial And Industrial [Member] | General C I [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	6,417,905,000			6,217,373,000
Commercial Financial And Industrial [Member] | Loans To Mortgage Companies [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	1,636,683,000			1,066,488,000
Commercial Financial And Industrial [Member] | T R U Ps [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	411,862,000	[3]		421,888,000	[4]
LOCOM valuation allowance	34,200,000			35,300,000
Consumer Real Estate Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	5,735,904,000			5,928,310,000
Consumer Real Estate Portfolio Segment [Member] | Home Equity [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	3,335,635,000	[5]		3,787,049,000	[6]
Consumer Real Estate Portfolio Segment [Member] | R E Installment Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	2,400,269,000			2,141,261,000
Commercial Real Estate Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	1,229,855,000			1,428,340,000
Commercial Real Estate Portfolio Segment [Member] | Income C R E [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	1,160,866,000			1,286,683,000
Commercial Real Estate Portfolio Segment [Member] | Residential C R E [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	68,989,000			141,657,000
Permanent Mortgage Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	805,511,000	[5]		880,459,000	[6]
Credit Card And Other Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	286,063,000			298,544,000
Credit Card And Other Portfolio Segment [Member] | Credit Card Portfolio Class [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	186,911,000			201,762,000
Credit Card And Other Portfolio Segment [Member] | Other Consumer Loans Class [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	99,152,000			96,782,000
Accruing [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	16,078,762,000			15,622,192,000
30-89 Days Past Due	100,493,000			154,765,000
90+ Days Past Due	38,990,000			50,790,000
Total Accruing	16,218,245,000			15,827,747,000
Accruing [Member] | Commercial Financial And Industrial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	8,290,200,000			7,472,269,000
30-89 Days Past Due	25,221,000			28,792,000
90+ Days Past Due	428,000			4,181,000
Total Accruing	8,315,849,000			7,505,242,000
Accruing [Member] | Commercial Financial And Industrial [Member] | General C I [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	6,315,340,000			6,068,266,000
30-89 Days Past Due	25,221,000			28,618,000
90+ Days Past Due	428,000			4,181,000
Total Accruing	6,340,989,000			6,101,065,000
Accruing [Member] | Commercial Financial And Industrial [Member] | Loans To Mortgage Companies [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	1,636,683,000			1,065,823,000
30-89 Days Past Due	0			174,000
90+ Days Past Due	0			0
Total Accruing	1,636,683,000			1,065,997,000
Accruing [Member] | Commercial Financial And Industrial [Member] | T R U Ps [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	338,177,000	[3]		338,180,000	[4]
30-89 Days Past Due	0	[3]		0	[4]
90+ Days Past Due	0	[3]		0	[4]
Total Accruing	338,177,000	[3]		338,180,000	[4]
Accruing [Member] | Consumer Real Estate Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	5,597,050,000			5,779,080,000
30-89 Days Past Due	54,555,000			72,328,000
90+ Days Past Due	28,959,000			31,700,000
Total Accruing	5,680,564,000			5,883,108,000
Accruing [Member] | Consumer Real Estate Portfolio Segment [Member] | Home Equity [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	3,246,585,000	[5]		3,692,346,000	[6]
30-89 Days Past Due	36,223,000	[5]		46,053,000	[6]
90+ Days Past Due	18,774,000	[5]		22,574,000	[6]
Total Accruing	3,301,582,000	[5]		3,760,973,000	[6]
Accruing [Member] | Consumer Real Estate Portfolio Segment [Member] | R E Installment Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	2,350,465,000			2,086,734,000
30-89 Days Past Due	18,332,000			26,275,000
90+ Days Past Due	10,185,000			9,126,000
Total Accruing	2,378,982,000			2,122,135,000
Accruing [Member] | Commercial Real Estate Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	1,162,904,000			1,272,917,000
30-89 Days Past Due	3,216,000			19,503,000
90+ Days Past Due	0			256,000
Total Accruing	1,166,120,000			1,292,676,000
Accruing [Member] | Commercial Real Estate Portfolio Segment [Member] | Income C R E [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	1,111,616,000			1,187,094,000
30-89 Days Past Due	2,393,000			18,634,000
90+ Days Past Due	0			256,000
Total Accruing	1,114,009,000			1,205,984,000
Accruing [Member] | Commercial Real Estate Portfolio Segment [Member] | Residential C R E [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	51,288,000			85,823,000
30-89 Days Past Due	823,000			869,000
90+ Days Past Due	0			0
Total Accruing	52,111,000			86,692,000
Accruing [Member] | Permanent Mortgage Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	748,470,000	[5]		808,293,000	[6]
30-89 Days Past Due	15,241,000	[5]		31,724,000	[6]
90+ Days Past Due	7,774,000	[5]		13,205,000	[6]
Total Accruing	771,485,000	[5]		853,222,000	[6]
Accruing [Member] | Credit Card And Other Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	280,138,000			289,633,000
30-89 Days Past Due	2,260,000			2,418,000
90+ Days Past Due	1,829,000			1,448,000
Total Accruing	284,227,000			293,499,000
Accruing [Member] | Credit Card And Other Portfolio Segment [Member] | Credit Card Portfolio Class [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	183,893,000			198,569,000
30-89 Days Past Due	1,666,000			1,816,000
90+ Days Past Due	1,352,000			1,377,000
Total Accruing	186,911,000			201,762,000
Accruing [Member] | Credit Card And Other Portfolio Segment [Member] | Other Consumer Loans Class [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	96,245,000			91,064,000
30-89 Days Past Due	594,000			602,000
90+ Days Past Due	477,000			71,000
Total Accruing	97,316,000			91,737,000
Non Accruing [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	102,630,000			144,246,000
30-89 Days Past Due	19,310,000			26,684,000
90+ Days Past Due	183,598,000			242,725,000
Total Non-Accruing	305,538,000	[7]		413,655,000
Non Accruing [Member] | Commercial Financial And Industrial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	36,480,000			52,141,000
30-89 Days Past Due	9,734,000			12,844,000
90+ Days Past Due	104,387,000			135,522,000
Total Non-Accruing	150,601,000			200,507,000
Non Accruing [Member] | Commercial Financial And Industrial [Member] | General C I [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	36,480,000			52,141,000
30-89 Days Past Due	9,734,000			12,844,000
90+ Days Past Due	30,702,000			51,323,000
Total Non-Accruing	76,916,000			116,308,000
Non Accruing [Member] | Commercial Financial And Industrial [Member] | Loans To Mortgage Companies [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	0			0
30-89 Days Past Due	0			0
90+ Days Past Due	0			491,000
Total Non-Accruing	0			491,000
Non Accruing [Member] | Commercial Financial And Industrial [Member] | T R U Ps [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	0	[3]		0	[4]
30-89 Days Past Due	0	[3]		0	[4]
90+ Days Past Due	73,685,000	[3]		83,708,000	[4]
Total Non-Accruing	73,685,000	[3]		83,708,000	[4]
Non Accruing [Member] | Consumer Real Estate Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	33,944,000			30,603,000
30-89 Days Past Due	3,665,000			4,062,000
90+ Days Past Due	17,731,000			10,537,000
Total Non-Accruing	55,340,000			45,202,000
Discharged Bankruptcy Loan	15,500,000
Non Accruing [Member] | Consumer Real Estate Portfolio Segment [Member] | Home Equity [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	20,990,000	[5]		17,098,000	[6]
30-89 Days Past Due	1,195,000	[5]		1,143,000	[6]
90+ Days Past Due	11,868,000	[5]		7,835,000	[6]
Total Non-Accruing	34,053,000	[5]		26,076,000	[6]
Non Accruing [Member] | Consumer Real Estate Portfolio Segment [Member] | R E Installment Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	12,954,000			13,505,000
30-89 Days Past Due	2,470,000			2,919,000
90+ Days Past Due	5,863,000			2,702,000
Total Non-Accruing	21,287,000			19,126,000
Non Accruing [Member] | Commercial Real Estate Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	12,206,000			53,283,000
30-89 Days Past Due	3,815,000			9,330,000
90+ Days Past Due	47,714,000			73,051,000
Total Non-Accruing	63,735,000			135,664,000
Non Accruing [Member] | Commercial Real Estate Portfolio Segment [Member] | Income C R E [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	10,552,000			18,409,000
30-89 Days Past Due	3,689,000			8,093,000
90+ Days Past Due	32,616,000			54,197,000
Total Non-Accruing	46,857,000			80,699,000
Non Accruing [Member] | Commercial Real Estate Portfolio Segment [Member] | Residential C R E [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	1,654,000			34,874,000
30-89 Days Past Due	126,000			1,237,000
90+ Days Past Due	15,098,000			18,854,000
Total Non-Accruing	16,878,000			54,965,000
Non Accruing [Member] | Permanent Mortgage Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	18,165,000	[5]		8,214,000	[6]
30-89 Days Past Due	2,095,000	[5]		448,000	[6]
90+ Days Past Due	13,766,000	[5]		18,575,000	[6]
Total Non-Accruing	34,026,000	[5]		27,237,000	[6]
Discharged Bankruptcy Loan	10,100,000
Non Accruing [Member] | Credit Card And Other Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	1,835,000			5,000
30-89 Days Past Due	1,000			0
90+ Days Past Due	0			5,040,000
Total Non-Accruing	1,836,000			5,045,000
Non Accruing [Member] | Credit Card And Other Portfolio Segment [Member] | Credit Card Portfolio Class [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	0			0
30-89 Days Past Due	0			0
90+ Days Past Due	0			0
Total Non-Accruing	0			0
Non Accruing [Member] | Credit Card And Other Portfolio Segment [Member] | Other Consumer Loans Class [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	1,835,000			5,000
30-89 Days Past Due	1,000			0
90+ Days Past Due	0			5,040,000
Total Non-Accruing	$ 1,836,000			$ 5,045,000

[1] Balances as of September 30, 2012 and 2011 include $14.7 million and $26.9 million of reserves, respectively, and $417.0 million and $623.3 million of balances in restricted consumer real estate loans and secured borrowings, respectively.

[2] Balances as of September 30, 2012 and 2011 include $.6 million and $5.5 million of reserves, respectively, and $14.2 million and $42.4 million of balances in restricted permanent mortgage loans and secured borrowings, respectively.

[3] Includes LOCOM valuation allowance $34.2 million.

[4] Includes LOCOM valuation allowance $35.3 million.

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

[6] Includes restricted real estate loans and secured borrowings

[7] The non-accruing balance as of September 30, 2012 includes $15.5 million of HELOC and R/E installment nonperforming loans, and $10.1 million of permanent mortgage nonperforming loans associated with implementation of recently issued regulatory guidance. Approximately 80 percent of these nonperforming loans are current.