Variable Interest Entities (Details 1) - USD ($) $ in Millions	Sep. 30, 2015	Dec. 31, 2014
Carrying amounts and maximum exposure to loss with respect to VIEs
Net Carrying Amount	$ 159.3	$ 144.3
Maximum Exposure to Loss	159.3	144.3
Investments in Affiliates [Member]
Carrying amounts and maximum exposure to loss with respect to VIEs
Net Carrying Amount	159.1	143.9
Maximum Exposure to Loss	159.1	143.9
Other investment [Member]
Carrying amounts and maximum exposure to loss with respect to VIEs
Net Carrying Amount	0.2	0.4
Maximum Exposure to Loss	$ 0.2	$ 0.4