Commitments, Guarantees, And Contingent Liabilities (Narrative) (Details) (USD $) In Millions, unless otherwise specified	Jun. 30, 2013
Guarantees, Commitments And Contingencies [Abstract]
Letters of credit, accrued liability	$ 10.8
Reserve for unfunded lending commitments	6.7
Deferred commitment fees	4.1
Guarantee of trust preferred securities issued by affiliated trusts	15
Guarantee Of Trust Preferred Securities Issued By Affiliated Trusts, Canceled	285
Commitments for Private Equity and Other Noninterest-bearing Investments	30.9
Range of possible loss, minimum	0
Range of possible loss, maximum	$ 50