Variable Interest Entities (Details) - Variable Interest Entity, Primary Beneficiary [Member] - USD ($) $ in Millions	Sep. 30, 2016	Dec. 31, 2015
Variable Interest Entity [Line Items]
Noncontrolling Interest in Variable Interest Entity	$ 72.0	$ 70.5
Variable Interest Entity, Consolidated, Carrying Amount, Assets	183.1	175.8
New Ocean Capital Management Ltd [Member]
Variable Interest Entity [Line Items]
Noncontrolling Interest in Variable Interest Entity	$ 0.3	$ 0.4