Commitments And Contingencies (Narrative) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012 item Y store	Dec. 31, 2011	Dec. 31, 2010	Sep. 30, 2011
Commitments And Contingencies [Line Items]
Sale leaseback transaction, number of units	142
Sale leaseback transaction, financial centers	180
Additional successive terms extendable at the option	4
Period of extendable lease term, in years	5
Rent expense	$ 32.0	$ 33.7	$ 31.4
Loan commitments	1,253	1,220
Fixed rate loan commitment	1,203
Floating rate loan commitment	50.0
Standby letters of credit	63.4	73.3
Number of corporate offices and training centers that are leased	38
Loan commitments fixed interest rate, minimum	0.00%
Loan commitments fixed interest rate, maximum	21.00%
Allowance for unfunded loan commitments	4.0	4.8
Extended credit	13.3	24.2
Unsecured credit extension	2.1	6.7
Amount accrued in anticipation of negotiating final settlement and resolution				$ 2
Maximum [Member]
Commitments And Contingencies [Line Items]
Lease Term	24 years
Maximum [Member] | Citizens Financial Group [Member]
Commitments And Contingencies [Line Items]
Lease Term	10 years
Maximum [Member] | Monroe Bancorp [Member]
Commitments And Contingencies [Line Items]
Lease Term	5 years
Minimum [Member]
Commitments And Contingencies [Line Items]
Lease Term	5 years
Minimum [Member] | Citizens Financial Group [Member]
Commitments And Contingencies [Line Items]
Lease Term	1 year
Minimum [Member] | Monroe Bancorp [Member]
Commitments And Contingencies [Line Items]
Lease Term	1 year