Loan Sales And Securitizations (Narrative) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Loan Sales And Securitizations [Abstract]
Single-family residential mortgage loans transferred	$ 45.4	$ 54.4	$ 98.8	$ 192.6
Net pre-tax gains on sale of residential mortgage loan	$ 1.1	$ 0.9	$ 2.0	$ 3.5
Percentage of single-family mortgage loans received as fees	0.29%	0.29%
Percentage of outstanding balance generating for annual servicing inclusive excess interests	0.34%	0.34%
Percentage of HELOC and home equity loans received as fees	0.50%	0.50%
Percentage variation in assumptions that can not necessarily be extrapolated			10.00%