Non-Interest Income (Schedule Of Non-Interest Income) (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
Noninterest Income [Abstract]
Rental income on operating leases	$ 252.6	$ 252.3	$ 251.2	$ 251.3	$ 252.2	$ 254.3	$ 261.0	$ 264.1	$ 1,007.4	$ 1,031.6	$ 1,018.1
Other non-interest Income:
Fee revenues									113.6	111.6	105.7
Factoring commissions									102.9	105.0	116.5
Gains on sales of leasing equipment									43.8	51.1	57.0
Gains on investments									31.2	34.6	0.9
Gains (losses) on loan and portfolio sales									22.9	34.2	(47.2)
Gains (losses) on OREO sales									4.3	10.2	(5.4)
Net gains (losses) on derivatives and foreign currency exchange									(5.4)	55.9	(37.9)
Impairment on assets held for sale									(32.2)	(36.6)	(55.9)
Termination fees on Canadian total return swap									0.0	(280.8)	0.0
Other revenues									83.1	65.4	15.9
Total other non-interest income	$ 137.2	$ 63.3	$ 84.6	$ 79.1	$ (117.6)	$ 83.6	$ 99.8	$ 84.8	364.2	150.6	149.6
Total non-interest income									$ 1,371.6	$ 1,182.2	$ 1,167.7