Loans (Accruing And Non-Accruing Loans By Class) (Details) (USD $)	Sep. 30, 2013		Dec. 31, 2012		Sep. 30, 2012
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Accruing	$ 15,120,514,000				$ 16,218,245,000
Total Non-Accruing	288,042,000				305,538,000
Loans, net of unearned income	15,408,556,000		16,708,582,000		16,523,783,000
Commercial Financial And Industrial Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Accruing	7,644,217,000				8,315,849,000
Total Non-Accruing	102,725,000				150,601,000
Loans, net of unearned income	7,746,942,000		8,796,956,000		8,466,450,000
Consumer Real Estate Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Accruing	5,336,090,000				5,680,564,000
Total Non-Accruing	121,957,000				55,340,000
Loans, net of unearned income	5,458,047,000	[1]	5,688,703,000	[1]	5,735,904,000	[1]
Commercial Real Estate Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Accruing	1,148,723,000				1,166,120,000
Total Non-Accruing	24,988,000				63,735,000
Loans, net of unearned income	1,173,711,000		1,168,235,000		1,229,855,000
Permanent Mortgage Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Accruing	660,721,000				771,485,000
Total Non-Accruing	36,973,000				34,026,000
Loans, net of unearned income	697,694,000	[2]	765,583,000	[2]	805,511,000	[2]
Credit Card And Other Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	332,162,000		289,105,000		286,063,000
General C I [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Accruing	6,573,399,000				6,340,989,000
Total Non-Accruing	65,526,000				76,916,000
Loans, net of unearned income	6,638,925,000				6,417,905,000
Loans To Mortgage Companies [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Accruing	732,366,000				1,636,683,000
Total Non-Accruing	335,000				0
Loans, net of unearned income	732,701,000				1,636,683,000
TRUPs [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Accruing	336,042,000	[3]			338,177,000	[4]
Total Non-Accruing	36,864,000	[3]			73,685,000	[4]
Loans, net of unearned income	372,906,000	[3]			411,862,000	[4]
LOCOM valuation allowance	29,400,000				34,200,000
Income C R E [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Accruing	1,069,661,000				1,114,009,000
Total Non-Accruing	20,593,000				46,857,000
Loans, net of unearned income	1,090,254,000				1,160,866,000
Residential C R E [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Accruing	33,619,000				52,111,000
Total Non-Accruing	4,395,000				16,878,000
Loans, net of unearned income	38,014,000				68,989,000
Home Equity [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Accruing	2,815,049,000				3,301,582,000
Total Non-Accruing	81,483,000				34,053,000
Loans, net of unearned income	2,896,532,000				3,335,635,000
R E Installment Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Accruing	2,520,147,000				2,378,982,000
Total Non-Accruing	40,474,000				21,287,000
Loans, net of unearned income	2,560,621,000				2,400,269,000
Credit Card Class [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
30-89 Days Past Due	1,480,000				1,666,000
90+ Days Past Due	1,258,000				1,352,000
Loans, net of unearned income	189,487,000				186,911,000
Other Consumer Loans Class [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
30-89 Days Past Due	803,000				594,000
90+ Days Past Due	138,000				477,000
Loans, net of unearned income	142,658,000				99,152,000
C I Purchase Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Accruing	2,410,000
Total Non-Accruing	0
Loans, net of unearned income	2,410,000
C R E Purchase Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Accruing	45,443,000
Total Non-Accruing	0
Loans, net of unearned income	45,443,000
R E Installment Purchase Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Accruing	894,000
Total Non-Accruing	0
Loans, net of unearned income	894,000
Other Purchase Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	17,000
Accruing [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	15,026,344,000				16,078,762,000
30-89 Days Past Due	60,324,000				100,493,000
90+ Days Past Due	33,846,000				38,990,000
Accruing [Member] | Commercial Financial And Industrial Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	7,635,506,000				8,290,200,000
30-89 Days Past Due	8,464,000				25,221,000
90+ Days Past Due	247,000				428,000
Accruing [Member] | Consumer Real Estate Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	5,278,746,000				5,597,050,000
30-89 Days Past Due	38,228,000				54,555,000
90+ Days Past Due	19,116,000				28,959,000
Accruing [Member] | Commercial Real Estate Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	1,141,623,000				1,162,904,000
30-89 Days Past Due	6,252,000				3,216,000
90+ Days Past Due	848,000				0
Accruing [Member] | Permanent Mortgage Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	643,385,000				748,470,000
30-89 Days Past Due	5,097,000				15,241,000
90+ Days Past Due	12,239,000				7,774,000
Accruing [Member] | Credit Card And Other Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	327,084,000				280,138,000
30-89 Days Past Due	2,283,000				2,260,000
90+ Days Past Due	1,396,000				1,829,000
Total Accruing	330,763,000				284,227,000
Accruing [Member] | General C I [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	6,565,838,000				6,315,340,000
30-89 Days Past Due	7,314,000				25,221,000
90+ Days Past Due	247,000				428,000
Accruing [Member] | Loans To Mortgage Companies [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	731,684,000				1,636,683,000
30-89 Days Past Due	682,000				0
90+ Days Past Due	0				0
Accruing [Member] | TRUPs [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	336,042,000	[3]			338,177,000	[4]
30-89 Days Past Due	0	[3]			0	[4]
90+ Days Past Due	0	[3]			0	[4]
Accruing [Member] | Income C R E [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	1,063,940,000				1,111,616,000
30-89 Days Past Due	5,438,000				2,393,000
90+ Days Past Due	283,000				0
Accruing [Member] | Residential C R E [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	33,442,000				51,288,000
30-89 Days Past Due	177,000				823,000
90+ Days Past Due	0				0
Accruing [Member] | Home Equity [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	2,778,336,000				3,246,585,000
30-89 Days Past Due	24,072,000				36,223,000
90+ Days Past Due	12,641,000				18,774,000
Accruing [Member] | R E Installment Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	2,499,516,000				2,350,465,000
30-89 Days Past Due	14,156,000				18,332,000
90+ Days Past Due	6,475,000				10,185,000
Accruing [Member] | Credit Card Class [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	186,749,000				183,893,000
30-89 Days Past Due	1,480,000				1,666,000
90+ Days Past Due	1,258,000				1,352,000
Total Accruing	189,487,000				186,911,000
Accruing [Member] | Other Consumer Loans Class [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	140,318,000				96,245,000
30-89 Days Past Due	803,000				594,000
90+ Days Past Due	138,000				477,000
Total Accruing	141,259,000				97,316,000
Accruing [Member] | C I Purchase Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	1,942,000
30-89 Days Past Due	468,000
90+ Days Past Due	0
Accruing [Member] | C R E Purchase Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	44,241,000
30-89 Days Past Due	637,000
90+ Days Past Due	565,000
Accruing [Member] | R E Installment Purchase Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	894,000
30-89 Days Past Due	0
90+ Days Past Due	0
Accruing [Member] | Other Purchase Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	17,000
30-89 Days Past Due	0
90+ Days Past Due	0
Total Accruing	17,000
Non Accruing [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	146,857,000				102,630,000
30-89 Days Past Due	13,500,000				19,310,000
90+ Days Past Due	127,685,000				183,598,000
Non Accruing [Member] | Commercial Financial And Industrial Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	33,582,000				36,480,000
30-89 Days Past Due	3,610,000				9,734,000
90+ Days Past Due	65,533,000				104,387,000
Non Accruing [Member] | Consumer Real Estate Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	91,282,000				33,944,000
30-89 Days Past Due	8,569,000				3,665,000
90+ Days Past Due	22,106,000				17,731,000
Non Accruing [Member] | Commercial Real Estate Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	7,076,000				12,206,000
30-89 Days Past Due	0				3,815,000
90+ Days Past Due	17,912,000				47,714,000
Non Accruing [Member] | Permanent Mortgage Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	13,518,000				18,165,000
30-89 Days Past Due	1,321,000				2,095,000
90+ Days Past Due	22,134,000				13,766,000
Non Accruing [Member] | Credit Card And Other Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	1,399,000				1,835,000
30-89 Days Past Due	0				1,000
90+ Days Past Due	0				0
Total Non-Accruing	1,399,000				1,836,000
Non Accruing [Member] | General C I [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	33,582,000				36,480,000
30-89 Days Past Due	3,610,000				9,734,000
90+ Days Past Due	28,334,000				30,702,000
Non Accruing [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	335,000				0
Non Accruing [Member] | TRUPs [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	36,864,000	[3]			73,685,000	[4]
Non Accruing [Member] | Income C R E [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	6,791,000				10,552,000
30-89 Days Past Due	0				3,689,000
90+ Days Past Due	13,802,000				32,616,000
Non Accruing [Member] | Residential C R E [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	285,000				1,654,000
30-89 Days Past Due	0				126,000
90+ Days Past Due	4,110,000				15,098,000
Non Accruing [Member] | Home Equity [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	61,733,000				20,990,000
30-89 Days Past Due	5,521,000				1,195,000
90+ Days Past Due	14,229,000				11,868,000
Non Accruing [Member] | R E Installment Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	29,549,000				12,954,000
30-89 Days Past Due	3,048,000				2,470,000
90+ Days Past Due	7,877,000				5,863,000
Non Accruing [Member] | Credit Card 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] | Other Consumer Loans Class [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	1,399,000				1,835,000
30-89 Days Past Due	0				1,000
90+ Days Past Due	0				0
Total Non-Accruing	1,399,000				1,836,000
Non Accruing [Member] | C I Purchase Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	0
30-89 Days Past Due	0
90+ Days Past Due	0
Non Accruing [Member] | C R E Purchase Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	0
30-89 Days Past Due	0
90+ Days Past Due	0
Non Accruing [Member] | R E Installment Purchase Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	0
30-89 Days Past Due	0
90+ Days Past Due	0
Non Accruing [Member] | Other Purchase Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	0
30-89 Days Past Due	0
90+ Days Past Due	0
Total Non-Accruing	$ 0

[1] Balances as of September 30, 2013 and 2012, and December 31, 2012 include $349.3 million, $417.0 million and $402.4 million of restricted and secured real estate loans, respectively. See Note 14 - Variable Interest Entities for additional information.

[2] Balances as of September 30, 2013 and 2012, and December 31, 2012 include $11.7 million, $14.2 million and $13.2 million of restricted and secured real estate loans, respectively. See Note 14 - Variable Interest Entities for additional information.

[3] Total TRUPs includes LOCOM valuation allowance of $29.4 million.

[4] Total TRUPs includes LOCOM valuation allowance of $34.2 million.