Discontinued Operations (Schedule Of Condensed Statements Of Income And Cash Flow Of Financial Freedom Discontinued Operations) (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
(Loss) income from discontinued operations, net of taxes	$ (5.2)	$ (3.2)	$ 115.5	$ 101.7	$ (716.7)	$ 37.3	$ (71.0)	$ 85.0	$ 90.2	$ (665.4)	$ 310.0
Financial Freedom
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net cash flows provided by operations									(47.0)	(40.0)	18.5
Net cash flows provided by (used in) investing activities									112.6	88.5	27.9
Discontinued Operation
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Interest income									39.5	84.4	74.5
Interest expense									109.1	380.0	370.9
Other non-interest income (loss)									(13.9)	37.9	73.2
Operating expenses									(30.0)	(432.0)	(101.9)
Income from discontinued operations before provision for income taxes									155.8	145.5	349.2
Benefit for income taxes									65.6	810.9	39.2
Other expenses									4.2	32.1	45.8
Net cash flows provided by operations									(14.6)	(4.3)	960.6
Net cash flows provided by (used in) investing activities									10,925.3	(567.4)	(721.7)
Discontinued Operation | Financial Freedom
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Interest income									10.2	11.6	4.3
Interest expense									9.5	10.7	4.4
Other non-interest income (loss)									(22.9)	15.4	16.7
Operating expenses									9.6	(330.1)	(33.7)
Income from discontinued operations before provision for income taxes									(12.6)	(313.8)	(17.1)
Benefit for income taxes									(4.9)	(103.7)	(6.7)
(Loss) income from discontinued operations, net of taxes									(7.7)	(210.1)	(10.4)
Salaries and benefits expense									19.0	16.0	11.0
Professional and legal fees									11.0	27.0	6.0
Other expenses									$ 17.0	$ 22.0	$ 16.0
Additional reserves						$ 260.0
Tax rate for discontinued operations									39.00%	33.00%	39.00%
Discontinued Operation | Financial Freedom | Residential Mortgage
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Impairment charge related to servicing liability									$ 50.0	$ 19.0
Net release of curtailment reserve									(111.0)
Increase in other servicing related reserves									$ 40.0