Variable Interest Entities (Details 1) (USD $) In Millions, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Carrying amounts and maximum exposure to loss with respect to VIEs
Net Carrying Amount	$ 130.0	$ 126.1
Maximum Exposure to Loss	130.0	126.1
Investments in Affiliates [Member]
Carrying amounts and maximum exposure to loss with respect to VIEs
Net Carrying Amount	129.4	125.5
Maximum Exposure to Loss	129.4	125.5
Other investment [Member]
Carrying amounts and maximum exposure to loss with respect to VIEs
Net Carrying Amount	0.6	0.6
Maximum Exposure to Loss	$ 0.6	$ 0.6