Loan Sales And Securitizations (Narrative) (Details) (USD $)	3 Months Ended				9 Months Ended
	Sep. 30, 2011		Sep. 30, 2010		Sep. 30, 2011		Sep. 30, 2010		Dec. 31, 2010
Single-family residential mortgage loans transferred	$ 53,300,000		$ 191,600,000		$ 245,900,000		$ 545,400,000
Net pre-tax gains on sale of residential mortgage loan	1,100,000		4,000,000		4,700,000		11,100,000
Nonperforming permanent mortgages transferred	187,700,000
Unpaid principal balance after partial charge-offs and LOCOM of permanent mortgages sold	126,000,000				126,000,000
Net pre-tax losses in Provision for loan losses	29,800,000
Percentage of single-family mortgage loans received as fees	0.29%		0.29%
Percentage of income related to excess income	0.34%		0.34%
Percentage of HELOC and home equity loans received as fees	0.50%		0.50%
Loans, net of unearned income	16,241,402,000	[1],[2]	17,059,489,000	[1],[2]	16,241,402,000	[1],[2]	17,059,489,000	[1],[2]	16,782,572,000
Trading securities	1,227,197,000		1,214,595,000		1,227,197,000		1,214,595,000		769,750,000
Term borrowings	2,509,804,000		2,805,731,000		2,509,804,000		2,805,731,000		3,228,070,000
FTBNA [Member]
Loans, net of unearned income	112,500,000		112,500,000		112,500,000		112,500,000
Trading securities	1,700,000		1,700,000		1,700,000		1,700,000
Term borrowings	$ 51,900,000		$ 51,000,000		$ 51,900,000		$ 51,000,000

[1] Q3 2011 and Q3 2010 include $26.9 million and $41.9 million of reserves, respectively, and $623.3 million and $735.8 million of balances in restricted consumer real estate loans, respectively.

[2] Q3 2011 and Q3 2010 include $5.5 million and $5.9 million of reserves, respectively, and $42.4 million and $60.7 million of balances in restricted permanent mortgage loans, respectively.