Discontinued Operations (Schedule Of Condensed Balance Sheet Aerospace Discontinued Operations) (Details) - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Assets of discontinued operations	$ 501.3	$ 13,220.7	$ 13,059.6
Liabilities of discontinued operations	509.3	3,737.7
Discontinued Operations, Disposed of by Sale | Aerospace
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Total cash and deposits	0.0	759.0
Net Loans	165.8	1,047.7
Operating lease equipment, net	18.4	9,677.6
Goodwill	0.0	126.8
Other assets	0.0	1,161.5
Assets of discontinued operations	184.2	12,772.6
Secured borrowings	0.0	1,204.6
Other liabilities	8.8	1,597.3
Liabilities of discontinued operations	$ 8.8	2,801.9
Deposits on commercial aerospace equipment		1,013.7
Maintenance reserves		1,084.9
Security deposits		$ 167.0