Loans (Schedule Of Loans In Process Of Foreclosure) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Loans In Process Of Foreclosure [Line Items]
Loans in process of foreclosure	$ 274.6	$ 308.0
PCI Loans
Loans In Process Of Foreclosure [Line Items]
Loans in process of foreclosure	133.7	201.7
Non-PCI
Loans In Process Of Foreclosure [Line Items]
Loans in process of foreclosure	140.9	106.3
OREO
Loans In Process Of Foreclosure [Line Items]
Loans in process of foreclosure	52.1	$ 69.9
Reverse Mortgage
Loans In Process Of Foreclosure [Line Items]
Loans in process of foreclosure, transfered from AHFI to AHFS	122.5
Reverse Mortgage | OREO
Loans In Process Of Foreclosure [Line Items]
Loans in process of foreclosure, transfered from AHFI to AHFS	$ 21.0