Recently Issued Accounting Standards (Details) - USD ($) $ in Millions	Mar. 31, 2019	Jan. 01, 2019
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Operating lease ROU assets	$ 434.0
Total lease liability	$ 437.3
ASU No. 2016-02
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Operating lease ROU assets		$ 458.1
Total lease liability		$ 458.7