Fair Value Disclosure (Details 3) - USD ($) $ in Millions	Dec. 31, 2015	Dec. 31, 2014
Assets
Loans	$ 8.8	$ 97.3
Liabilities
Non-Recourse Debt	6.9	15.9
Carrying Amount [Member]
Assets
Investment Funds	0.6	1.5
Loans		97.3
Liabilities
Recourse fixed rate debt	3,915.0	3,639.9
Recourse floating rate debt	275.2	540.0
Nonrecourse debt		15.9
Estimate of Fair Value Measurement [Member]
Assets
Investment Funds	1.2	2.4
Loans	8.7	97.4
Liabilities
Recourse fixed rate debt	3,882.6	3,775.0
Recourse floating rate debt	264.6	540.0
Nonrecourse debt	$ 7.1	$ 16.6