Basis of Presentation and Principles of Consolidation (Details) - USD ($) $ in Millions	Jun. 30, 2019	Jan. 01, 2019
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Operating lease, right-of-use asset	$ 15.7
Operating lease liabilities	$ 16.5
ASC 842
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Operating lease, right-of-use asset		$ 13.4
Operating lease liabilities		$ 14.0