Debt (Details 1) (Recourse, Convertible Subordinated Notes, USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Recourse | Convertible Subordinated Notes
Total interest expense recognized on the Convertible Subordinated Notes
Coupon rate interest	$ 4.3	$ 4.3	$ 8.7	$ 8.7
Amortized debt discount	3.6	3.2	7.1	6.5
Total interest expense recognized on the Convertible Subordinated Notes	$ 7.9	$ 7.5	$ 15.8	$ 15.2