Discontinued Operations (Schedule of Condensed Balance Sheet Aerospace Discontinued Operations) (Details) - USD ($) $ in Millions	Jun. 30, 2017	Dec. 31, 2016
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Assets of discontinued operations	$ 630.9	$ 13,220.7
Liabilities of discontinued operations	607.8	3,737.7
Aerospace [Member] | Discontinued Operations, Disposed of by Sale [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Total cash and deposits	0.0
Net Loans	226.7
Operating lease equipment, net	21.0
Goodwill	0.0
Other assets	(2.8)
Assets of discontinued operations	244.9
Secured borrowings	0.0
Other liabilities	23.7
Liabilities of discontinued operations	$ 23.7
Aerospace [Member] | Discontinued Operations, Held-for-sale [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Total cash and deposits		759.0
Net Loans		1,047.7
Operating lease equipment, net		9,677.6
Goodwill		126.8
Other assets		1,161.5
Assets of discontinued operations		12,772.6
Secured borrowings		1,204.6
Other liabilities		1,597.3
Liabilities of discontinued operations		2,801.9
Deposits on commercial aerospace equipment		1,013.7
Maintenance reserves		1,084.9
Security deposits		$ 167.0