Unconsolidated Investments - Schedule of Interest Income and Foreign Currency Gain (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Equity Method Investments and Joint Ventures [Abstract]
Income from unconsolidated investments - loan pools	$ (1.8)	$ 2.3	$ 4.3	$ 7.0
Foreign currency translation loss	(0.7)	(2.9)	(1.0)	(2.5)
Total	$ (2.5)	$ (0.6)	$ 3.3	$ 4.5