Significant Accounting Policies (Details) $ in Millions	Jun. 30, 2016 USD ($)	Jan. 01, 2016 investment
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Maximum risk of loss in variable interest entities	$ 6.1
Net assets of non-consolidated variable interest entities	$ 39,200.0
Early Adoption
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Number of variable interest entities consolidated | investment		3