Discontinued Operations (Schedule of Condensed Combined Statements of Income and Cash Flow of Discontinued Operations) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Gain (loss) on sale of discontinued operations, net of taxes	$ (1.3)	$ 0.0	$ 118.6	$ 0.0
Total income (loss) from discontinued operations, net of taxes	(3.2)	37.3	214.0	51.3
Discontinued Operations
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Interest income	5.5	20.5	34.8	58.3
Interest expense	(3.5)	(93.7)	(105.7)	(281.7)
Provision for credit losses	0.0	(1.0)	0.0	(15.7)
Rental income on operating leases	2.0	309.3	310.7	928.8
Other income (losses)	5.7	(14.0)	(16.4)	24.0
Depreciation on operating lease equipment	0.0	(112.3)	0.0	(339.4)
Maintenance and other operating lease expenses	0.0	(3.8)	(4.2)	(25.4)
Operating expenses	(14.1)	(66.1)	(15.8)	(373.6)
Loss on debt extinguishment	0.0	0.0	(39.0)	(1.6)
Income (loss) from discontinued operations before benefit (provision) for income taxes	(4.4)	38.9	164.4	(26.3)
Benefit (provision) for income taxes	2.5	(1.6)	(69.0)	77.6
Gain (loss) on sale of discontinued operations, net of taxes	(1.3)	0.0	118.6	0.0
Total income (loss) from discontinued operations, net of taxes	$ (3.2)	$ 37.3	214.0	51.3
Net cash flows (used for) provided by operations			(1.1)	694.9
Net cash flows provided by (used in) investing activities			$ 10,867.5	$ (393.0)