Fair Value Disclosure (Details 3) (USD $) In Millions, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Assets
Loans	$ 13.4	$ 97.3
Carrying Amount [Member]
Assets
Investment Funds	1.3	1.5
Loans	13.4	97.3
Liabilities
Recourse fixed rate debt	4,068.8	3,639.9
Recourse floating rate debt	375.1	540.0
Nonrecourse debt	13.7	15.9
Fair Value [Member]
Assets
Investment Funds	2.1	2.4
Loans	13.4	97.4
Liabilities
Recourse fixed rate debt	4,219.1	3,775.0
Recourse floating rate debt	376.0	540.0
Nonrecourse debt	$ 14.3	$ 16.6